Hilo, Big Island weather by month

Check out Hilo, Big Island weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Hilo, Big Island (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
70°F maximum daytime temperature in January in Hilo, Big Island70
70°F maximum daytime temperature in February in Hilo, Big Island70
70°F maximum daytime temperature in March in Hilo, Big Island70
72°F maximum daytime temperature in April in Hilo, Big Island72
73°F maximum daytime temperature in May in Hilo, Big Island73
75°F maximum daytime temperature in June in Hilo, Big Island75
75°F maximum daytime temperature in July in Hilo, Big Island75
75°F maximum daytime temperature in August in Hilo, Big Island75
75°F maximum daytime temperature in September in Hilo, Big Island75
75°F maximum daytime temperature in October in Hilo, Big Island75
73°F maximum daytime temperature in November in Hilo, Big Island73
72°F maximum daytime temperature in December in Hilo, Big Island72
Min temperature (night-time)
55°F minimum night-time temperature in January in Hilo, Big Island55
55°F minimum night-time temperature in February in Hilo, Big Island55
55°F minimum night-time temperature in March in Hilo, Big Island55
57°F minimum night-time temperature in April in Hilo, Big Island57
59°F minimum night-time temperature in May in Hilo, Big Island59
61°F minimum night-time temperature in June in Hilo, Big Island61
61°F minimum night-time temperature in July in Hilo, Big Island61
61°F minimum night-time temperature in August in Hilo, Big Island61
61°F minimum night-time temperature in September in Hilo, Big Island61
61°F minimum night-time temperature in October in Hilo, Big Island61
59°F minimum night-time temperature in November in Hilo, Big Island59
57°F minimum night-time temperature in December in Hilo, Big Island57
Heat & Humidity
Low heat & humidity in January in Hilo, Big IslandL
Low heat & humidity in February in Hilo, Big IslandL
Low heat & humidity in March in Hilo, Big IslandL
Low heat & humidity in April in Hilo, Big IslandL
Moderate heat & humidity in May in Hilo, Big IslandM
Moderate heat & humidity in June in Hilo, Big IslandM
Moderate heat & humidity in July in Hilo, Big IslandM
Moderate heat & humidity in August in Hilo, Big IslandM
Moderate heat & humidity in September in Hilo, Big IslandM
Moderate heat & humidity in October in Hilo, Big IslandM
Moderate heat & humidity in November in Hilo, Big IslandM
Low heat & humidity in December in Hilo, Big IslandL
Sea temperature
75°F sea temperature in January in Hilo, Big Island75
75°F sea temperature in February in Hilo, Big Island75
75°F sea temperature in March in Hilo, Big Island75
75°F sea temperature in April in Hilo, Big Island75
77°F sea temperature in May in Hilo, Big Island77
77°F sea temperature in June in Hilo, Big Island77
79°F sea temperature in July in Hilo, Big Island79
79°F sea temperature in August in Hilo, Big Island79
81°F sea temperature in September in Hilo, Big Island81
79°F sea temperature in October in Hilo, Big Island79
79°F sea temperature in November in Hilo, Big Island79
77°F sea temperature in December in Hilo, Big Island77

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Hilo, Big Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
11 hours of daylight per day in January in Hilo, Big Island11
12 hours of daylight per day in February in Hilo, Big Island12
12 hours of daylight per day in March in Hilo, Big Island12
13 hours of daylight per day in April in Hilo, Big Island13
13 hours of daylight per day in May in Hilo, Big Island13
13 hours of daylight per day in June in Hilo, Big Island13
13 hours of daylight per day in July in Hilo, Big Island13
13 hours of daylight per day in August in Hilo, Big Island13
12 hours of daylight per day in September in Hilo, Big Island12
12 hours of daylight per day in October in Hilo, Big Island12
11 hours of daylight per day in November in Hilo, Big Island11
11 hours of daylight per day in December in Hilo, Big Island11
UV Index (Maximum)
UV (maximum) index 8 (Very High) in January in Hilo, Big Island8
UV (maximum) index 10 (Very High) in February in Hilo, Big Island10
UV (maximum) index 11+ (Extreme) in March in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in April in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in May in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in June in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in July in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in August in Hilo, Big Island11
UV (maximum) index 11+ (Extreme) in September in Hilo, Big Island11
UV (maximum) index 10 (Very High) in October in Hilo, Big Island10
UV (maximum) index 8 (Very High) in November in Hilo, Big Island8
UV (maximum) index 7 (High) in December in Hilo, Big Island7

Rainfall in Hilo, Big Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
13 days with some rainfall in January in Hilo, Big Island13
12 days with some rainfall in February in Hilo, Big Island12
16 days with some rainfall in March in Hilo, Big Island16
16 days with some rainfall in April in Hilo, Big Island16
14 days with some rainfall in May in Hilo, Big Island14
14 days with some rainfall in June in Hilo, Big Island14
16 days with some rainfall in July in Hilo, Big Island16
15 days with some rainfall in August in Hilo, Big Island15
14 days with some rainfall in September in Hilo, Big Island14
15 days with some rainfall in October in Hilo, Big Island15
14 days with some rainfall in November in Hilo, Big Island14
14 days with some rainfall in December in Hilo, Big Island14
Average monthly rainfall (inches)
9.3 inches monthly rainfall in January in Hilo, Big Island9.3
9.6 inches monthly rainfall in February in Hilo, Big Island9.6
13.4 inches monthly rainfall in March in Hilo, Big Island13.4
11.5 inches monthly rainfall in April in Hilo, Big Island11.5
8.1 inches monthly rainfall in May in Hilo, Big Island8.1
7.4 inches monthly rainfall in June in Hilo, Big Island7.4
10.8 inches monthly rainfall in July in Hilo, Big Island10.8
9.8 inches monthly rainfall in August in Hilo, Big Island9.8
9.9 inches monthly rainfall in September in Hilo, Big Island9.9
9.8 inches monthly rainfall in October in Hilo, Big Island9.8
15.5 inches monthly rainfall in November in Hilo, Big Island15.5
11.6 inches monthly rainfall in December in Hilo, Big Island11.6

More about Hilo, Big Island

Hilo, Big Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Hawaii (Hilo, Big Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Hilo, Big Island?

Hilo, Big Island has a hot tropical climate with no dry season.

Hilo, Big Island weather in January

Expect daytime maximum temperatures of 70°F in Hilo, Big Island, Hawaii in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 9.3 inches of rainfall in the month.

  • 70°F maximum daytime temperature in January in Hilo, Big Island70
    70°F max day temperature
  • 5 hours of sunshine per day
  • 13 days with some rainfall in January in Hilo, Big Island13
    13 days with some rainfall
  • 55°F minimum night-time temperature in January in Hilo, Big Island55
    55°F min night temperature
  • 11 hours of daylight per day in January in Hilo, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in January in Hilo, Big IslandL
    Low heat & humidity
  • 9.3 inches monthly rainfall in January in Hilo, Big Island9.3
    9.3 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in January in Hilo, Big Island8
    8 (Very High) UV index
  • 75°F sea temperature in January in Hilo, Big Island75
    75°F sea temperature

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Hilo, Big Island weather in February

Expect daytime maximum temperatures of 70°F in Hilo, Big Island, Hawaii in February based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 9.6 inches of rainfall in the month.

  • 70°F maximum daytime temperature in February in Hilo, Big Island70
    70°F max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in February in Hilo, Big Island12
    12 days with some rainfall
  • 55°F minimum night-time temperature in February in Hilo, Big Island55
    55°F min night temperature
  • 12 hours of daylight per day in February in Hilo, Big Island12
    12 hours of daylight per day
  • Low heat & humidity in February in Hilo, Big IslandL
    Low heat & humidity
  • 9.6 inches monthly rainfall in February in Hilo, Big Island9.6
    9.6 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in February in Hilo, Big Island10
    10 (Very High) UV index
  • 75°F sea temperature in February in Hilo, Big Island75
    75°F sea temperature

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Hilo, Big Island weather in March

Expect daytime maximum temperatures of 70°F in Hilo, Big Island, Hawaii in March based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 13.4 inches of rainfall in the month.

  • 70°F maximum daytime temperature in March in Hilo, Big Island70
    70°F max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in March in Hilo, Big Island16
    16 days with some rainfall
  • 55°F minimum night-time temperature in March in Hilo, Big Island55
    55°F min night temperature
  • 12 hours of daylight per day in March in Hilo, Big Island12
    12 hours of daylight per day
  • Low heat & humidity in March in Hilo, Big IslandL
    Low heat & humidity
  • 13.4 inches monthly rainfall in March in Hilo, Big Island13.4
    13.4 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Hilo, Big Island11
    11+ (Extreme) UV index
  • 75°F sea temperature in March in Hilo, Big Island75
    75°F sea temperature

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Hilo, Big Island weather in April

Expect daytime maximum temperatures of 72°F in Hilo, Big Island, Hawaii in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 11.5 inches of rainfall in the month.

  • 72°F maximum daytime temperature in April in Hilo, Big Island72
    72°F max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in April in Hilo, Big Island16
    16 days with some rainfall
  • 57°F minimum night-time temperature in April in Hilo, Big Island57
    57°F min night temperature
  • 13 hours of daylight per day in April in Hilo, Big Island13
    13 hours of daylight per day
  • Low heat & humidity in April in Hilo, Big IslandL
    Low heat & humidity
  • 11.5 inches monthly rainfall in April in Hilo, Big Island11.5
    11.5 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in April in Hilo, Big Island11
    11+ (Extreme) UV index
  • 75°F sea temperature in April in Hilo, Big Island75
    75°F sea temperature

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Hilo, Big Island weather in May

Expect daytime maximum temperatures of 73°F in Hilo, Big Island, Hawaii in May based on long-term weather averages. There are 5 hours of sunshine per day on average with 14 days with some rainfall and typically 8.1 inches of rainfall in the month.

  • 73°F maximum daytime temperature in May in Hilo, Big Island73
    73°F max day temperature
  • 5 hours of sunshine per day
  • 14 days with some rainfall in May in Hilo, Big Island14
    14 days with some rainfall
  • 59°F minimum night-time temperature in May in Hilo, Big Island59
    59°F min night temperature
  • 13 hours of daylight per day in May in Hilo, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in May in Hilo, Big IslandM
    Moderate heat & humidity
  • 8.1 inches monthly rainfall in May in Hilo, Big Island8.1
    8.1 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Hilo, Big Island11
    11+ (Extreme) UV index
  • 77°F sea temperature in May in Hilo, Big Island77
    77°F sea temperature

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Hilo, Big Island weather in June

Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in June based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 7.4 inches of rainfall in the month.

  • 75°F maximum daytime temperature in June in Hilo, Big Island75
    75°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in June in Hilo, Big Island14
    14 days with some rainfall
  • 61°F minimum night-time temperature in June in Hilo, Big Island61
    61°F min night temperature
  • 13 hours of daylight per day in June in Hilo, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in June in Hilo, Big IslandM
    Moderate heat & humidity
  • 7.4 inches monthly rainfall in June in Hilo, Big Island7.4
    7.4 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Hilo, Big Island11
    11+ (Extreme) UV index
  • 77°F sea temperature in June in Hilo, Big Island77
    77°F sea temperature

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Hilo, Big Island weather in July

Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in July based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 10.8 inches of rainfall in the month.

  • 75°F maximum daytime temperature in July in Hilo, Big Island75
    75°F max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in July in Hilo, Big Island16
    16 days with some rainfall
  • 61°F minimum night-time temperature in July in Hilo, Big Island61
    61°F min night temperature
  • 13 hours of daylight per day in July in Hilo, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in July in Hilo, Big IslandM
    Moderate heat & humidity
  • 10.8 inches monthly rainfall in July in Hilo, Big Island10.8
    10.8 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Hilo, Big Island11
    11+ (Extreme) UV index
  • 79°F sea temperature in July in Hilo, Big Island79
    79°F sea temperature

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Hilo, Big Island weather in August

Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 9.8 inches of rainfall in the month.

  • 75°F maximum daytime temperature in August in Hilo, Big Island75
    75°F max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in August in Hilo, Big Island15
    15 days with some rainfall
  • 61°F minimum night-time temperature in August in Hilo, Big Island61
    61°F min night temperature
  • 13 hours of daylight per day in August in Hilo, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in August in Hilo, Big IslandM
    Moderate heat & humidity
  • 9.8 inches monthly rainfall in August in Hilo, Big Island9.8
    9.8 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Hilo, Big Island11
    11+ (Extreme) UV index
  • 79°F sea temperature in August in Hilo, Big Island79
    79°F sea temperature

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Hilo, Big Island weather in September

Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 14 days with some rainfall and typically 9.9 inches of rainfall in the month.

  • 75°F maximum daytime temperature in September in Hilo, Big Island75
    75°F max day temperature
  • 5 hours of sunshine per day
  • 14 days with some rainfall in September in Hilo, Big Island14
    14 days with some rainfall
  • 61°F minimum night-time temperature in September in Hilo, Big Island61
    61°F min night temperature
  • 12 hours of daylight per day in September in Hilo, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Hilo, Big IslandM
    Moderate heat & humidity
  • 9.9 inches monthly rainfall in September in Hilo, Big Island9.9
    9.9 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Hilo, Big Island11
    11+ (Extreme) UV index
  • 81°F sea temperature in September in Hilo, Big Island81
    81°F sea temperature

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Hilo, Big Island weather in October

Expect daytime maximum temperatures of 75°F in Hilo, Big Island, Hawaii in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 9.8 inches of rainfall in the month.

  • 75°F maximum daytime temperature in October in Hilo, Big Island75
    75°F max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in October in Hilo, Big Island15
    15 days with some rainfall
  • 61°F minimum night-time temperature in October in Hilo, Big Island61
    61°F min night temperature
  • 12 hours of daylight per day in October in Hilo, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in October in Hilo, Big IslandM
    Moderate heat & humidity
  • 9.8 inches monthly rainfall in October in Hilo, Big Island9.8
    9.8 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in October in Hilo, Big Island10
    10 (Very High) UV index
  • 79°F sea temperature in October in Hilo, Big Island79
    79°F sea temperature

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Hilo, Big Island weather in November

Expect daytime maximum temperatures of 73°F in Hilo, Big Island, Hawaii in November based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 15.5 inches of rainfall in the month.

  • 73°F maximum daytime temperature in November in Hilo, Big Island73
    73°F max day temperature
  • 4 hours of sunshine per day
  • 14 days with some rainfall in November in Hilo, Big Island14
    14 days with some rainfall
  • 59°F minimum night-time temperature in November in Hilo, Big Island59
    59°F min night temperature
  • 11 hours of daylight per day in November in Hilo, Big Island11
    11 hours of daylight per day
  • Moderate heat & humidity in November in Hilo, Big IslandM
    Moderate heat & humidity
  • 15.5 inches monthly rainfall in November in Hilo, Big Island15.5
    15.5 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in November in Hilo, Big Island8
    8 (Very High) UV index
  • 79°F sea temperature in November in Hilo, Big Island79
    79°F sea temperature

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Hilo, Big Island weather in December

Expect daytime maximum temperatures of 72°F in Hilo, Big Island, Hawaii in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 11.6 inches of rainfall in the month.

  • 72°F maximum daytime temperature in December in Hilo, Big Island72
    72°F max day temperature
  • 4 hours of sunshine per day
  • 14 days with some rainfall in December in Hilo, Big Island14
    14 days with some rainfall
  • 57°F minimum night-time temperature in December in Hilo, Big Island57
    57°F min night temperature
  • 11 hours of daylight per day in December in Hilo, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in December in Hilo, Big IslandL
    Low heat & humidity
  • 11.6 inches monthly rainfall in December in Hilo, Big Island11.6
    11.6 inches of monthly rainfall
  • UV (maximum) index 7 (High) in December in Hilo, Big Island7
    7 (High) UV index
  • 77°F sea temperature in December in Hilo, Big Island77
    77°F sea temperature

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More about Hilo, Big Island

Hilo, Big Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Expires at 23:59 on Thursday 31st Dec 2026

The climate guide for Hawaii (Hilo, Big Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Hilo, Big Island, Hawaii hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.3%
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Hilo, Big Island weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Hilo, Big Island, Hawaii, USA and the UK (London).

Maximum daytime temperature (°F)

Hilo, Big Island, Hawaii, USA
UK (London)
70
45
70
45
70
50
72
55
73
63
75
68
75
72
75
72
75
66
75
59
73
50
72
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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