Kailua, Oahu weather by month

Check out Kailua, Oahu weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Kailua, Oahu (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
26°C maximum daytime temperature in January in Kailua, Oahu26
26°C maximum daytime temperature in February in Kailua, Oahu26
27°C maximum daytime temperature in March in Kailua, Oahu27
27°C maximum daytime temperature in April in Kailua, Oahu27
28°C maximum daytime temperature in May in Kailua, Oahu28
29°C maximum daytime temperature in June in Kailua, Oahu29
30°C maximum daytime temperature in July in Kailua, Oahu30
31°C maximum daytime temperature in August in Kailua, Oahu31
30°C maximum daytime temperature in September in Kailua, Oahu30
29°C maximum daytime temperature in October in Kailua, Oahu29
28°C maximum daytime temperature in November in Kailua, Oahu28
27°C maximum daytime temperature in December in Kailua, Oahu27
Min temperature (night-time)
18°C minimum night-time temperature in January in Kailua, Oahu18
18°C minimum night-time temperature in February in Kailua, Oahu18
19°C minimum night-time temperature in March in Kailua, Oahu19
20°C minimum night-time temperature in April in Kailua, Oahu20
20°C minimum night-time temperature in May in Kailua, Oahu20
21°C minimum night-time temperature in June in Kailua, Oahu21
22°C minimum night-time temperature in July in Kailua, Oahu22
22°C minimum night-time temperature in August in Kailua, Oahu22
22°C minimum night-time temperature in September in Kailua, Oahu22
21°C minimum night-time temperature in October in Kailua, Oahu21
20°C minimum night-time temperature in November in Kailua, Oahu20
19°C minimum night-time temperature in December in Kailua, Oahu19
Heat & Humidity
Low heat & humidity in January in Kailua, OahuL
Low heat & humidity in February in Kailua, OahuL
Low heat & humidity in March in Kailua, OahuL
Low heat & humidity in April in Kailua, OahuL
Moderate heat & humidity in May in Kailua, OahuM
Moderate heat & humidity in June in Kailua, OahuM
Moderate heat & humidity in July in Kailua, OahuM
High heat & humidity in August in Kailua, OahuH
High heat & humidity in September in Kailua, OahuH
Moderate heat & humidity in October in Kailua, OahuM
Moderate heat & humidity in November in Kailua, OahuM
Low heat & humidity in December in Kailua, OahuL
Sea temperature
24°C sea temperature in January in Kailua, Oahu24
24°C sea temperature in February in Kailua, Oahu24
24°C sea temperature in March in Kailua, Oahu24
24°C sea temperature in April in Kailua, Oahu24
25°C sea temperature in May in Kailua, Oahu25
25°C sea temperature in June in Kailua, Oahu25
26°C sea temperature in July in Kailua, Oahu26
26°C sea temperature in August in Kailua, Oahu26
27°C sea temperature in September in Kailua, Oahu27
27°C sea temperature in October in Kailua, Oahu27
26°C sea temperature in November in Kailua, Oahu26
25°C sea temperature in December in Kailua, Oahu25

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

Sunshine & UV index in Kailua, Oahu

  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 Kailua, Oahu11
11 hours of daylight per day in February in Kailua, Oahu11
12 hours of daylight per day in March in Kailua, Oahu12
13 hours of daylight per day in April in Kailua, Oahu13
13 hours of daylight per day in May in Kailua, Oahu13
13 hours of daylight per day in June in Kailua, Oahu13
13 hours of daylight per day in July in Kailua, Oahu13
13 hours of daylight per day in August in Kailua, Oahu13
12 hours of daylight per day in September in Kailua, Oahu12
12 hours of daylight per day in October in Kailua, Oahu12
11 hours of daylight per day in November in Kailua, Oahu11
11 hours of daylight per day in December in Kailua, Oahu11
UV Index (Maximum)
UV (maximum) index 7 (High) in January in Kailua, Oahu7
UV (maximum) index 9 (Very High) in February in Kailua, Oahu9
UV (maximum) index 11 (Extreme) in March in Kailua, Oahu11
UV (maximum) index 11 (Extreme) in April in Kailua, Oahu11
UV (maximum) index 11 (Extreme) in May in Kailua, Oahu11
UV (maximum) index 11+ (Extreme) in June in Kailua, Oahu11
UV (maximum) index 11+ (Extreme) in July in Kailua, Oahu11
UV (maximum) index 11+ (Extreme) in August in Kailua, Oahu11
UV (maximum) index 11 (Extreme) in September in Kailua, Oahu11
UV (maximum) index 9 (Very High) in October in Kailua, Oahu9
UV (maximum) index 7 (High) in November in Kailua, Oahu7
UV (maximum) index 6 (High) in December in Kailua, Oahu6

Rainfall in Kailua, Oahu

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in Kailua, Oahu10
9 days with some rainfall in February in Kailua, Oahu9
10 days with some rainfall in March in Kailua, Oahu10
10 days with some rainfall in April in Kailua, Oahu10
8 days with some rainfall in May in Kailua, Oahu8
6 days with some rainfall in June in Kailua, Oahu6
8 days with some rainfall in July in Kailua, Oahu8
7 days with some rainfall in August in Kailua, Oahu7
8 days with some rainfall in September in Kailua, Oahu8
9 days with some rainfall in October in Kailua, Oahu9
10 days with some rainfall in November in Kailua, Oahu10
11 days with some rainfall in December in Kailua, Oahu11
Average monthly rainfall (mm)
89 mm monthly rainfall in January in Kailua, Oahu89
79 mm monthly rainfall in February in Kailua, Oahu79
102 mm monthly rainfall in March in Kailua, Oahu102
55 mm monthly rainfall in April in Kailua, Oahu55
35 mm monthly rainfall in May in Kailua, Oahu35
27 mm monthly rainfall in June in Kailua, Oahu27
41 mm monthly rainfall in July in Kailua, Oahu41
38 mm monthly rainfall in August in Kailua, Oahu38
44 mm monthly rainfall in September in Kailua, Oahu44
76 mm monthly rainfall in October in Kailua, Oahu76
119 mm monthly rainfall in November in Kailua, Oahu119
109 mm monthly rainfall in December in Kailua, Oahu109

More about Kailua, Oahu

Kailua, Oahu by month

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

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The climate guide for Hawaii (Kailua, Oahu) 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 Kailua, Oahu?

Kailua, Oahu has a hot tropical climate with a short dry season.

Kailua, Oahu weather in January

Expect daytime maximum temperatures of 26°C in Kailua, Oahu, Hawaii in January based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 89 mm of rainfall in the month.

  • 26°C maximum daytime temperature in January in Kailua, Oahu26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in January in Kailua, Oahu10
    10 days with some rainfall
  • 18°C minimum night-time temperature in January in Kailua, Oahu18
    18°C min night temperature
  • 11 hours of daylight per day in January in Kailua, Oahu11
    11 hours of daylight per day
  • Low heat & humidity in January in Kailua, OahuL
    Low heat & humidity
  • 89 mm monthly rainfall in January in Kailua, Oahu89
    89 mm of monthly rainfall
  • UV (maximum) index 7 (High) in January in Kailua, Oahu7
    7 (High) UV index
  • 24°C sea temperature in January in Kailua, Oahu24
    24°C sea temperature

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Kailua, Oahu weather in February

Expect daytime maximum temperatures of 26°C in Kailua, Oahu, Hawaii in February based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 79 mm of rainfall in the month.

  • 26°C maximum daytime temperature in February in Kailua, Oahu26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in February in Kailua, Oahu9
    9 days with some rainfall
  • 18°C minimum night-time temperature in February in Kailua, Oahu18
    18°C min night temperature
  • 11 hours of daylight per day in February in Kailua, Oahu11
    11 hours of daylight per day
  • Low heat & humidity in February in Kailua, OahuL
    Low heat & humidity
  • 79 mm monthly rainfall in February in Kailua, Oahu79
    79 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in February in Kailua, Oahu9
    9 (Very High) UV index
  • 24°C sea temperature in February in Kailua, Oahu24
    24°C sea temperature

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Kailua, Oahu weather in March

Expect daytime maximum temperatures of 27°C in Kailua, Oahu, Hawaii in March based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 102 mm of rainfall in the month.

  • 27°C maximum daytime temperature in March in Kailua, Oahu27
    27°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in March in Kailua, Oahu10
    10 days with some rainfall
  • 19°C minimum night-time temperature in March in Kailua, Oahu19
    19°C min night temperature
  • 12 hours of daylight per day in March in Kailua, Oahu12
    12 hours of daylight per day
  • Low heat & humidity in March in Kailua, OahuL
    Low heat & humidity
  • 102 mm monthly rainfall in March in Kailua, Oahu102
    102 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in March in Kailua, Oahu11
    11 (Extreme) UV index
  • 24°C sea temperature in March in Kailua, Oahu24
    24°C sea temperature

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Kailua, Oahu weather in April

Expect daytime maximum temperatures of 27°C in Kailua, Oahu, Hawaii in April based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 55 mm of rainfall in the month.

  • 27°C maximum daytime temperature in April in Kailua, Oahu27
    27°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in April in Kailua, Oahu10
    10 days with some rainfall
  • 20°C minimum night-time temperature in April in Kailua, Oahu20
    20°C min night temperature
  • 13 hours of daylight per day in April in Kailua, Oahu13
    13 hours of daylight per day
  • Low heat & humidity in April in Kailua, OahuL
    Low heat & humidity
  • 55 mm monthly rainfall in April in Kailua, Oahu55
    55 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in April in Kailua, Oahu11
    11 (Extreme) UV index
  • 24°C sea temperature in April in Kailua, Oahu24
    24°C sea temperature

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Kailua, Oahu weather in May

Expect daytime maximum temperatures of 28°C in Kailua, Oahu, Hawaii in May based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in May in Kailua, Oahu28
    28°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in May in Kailua, Oahu8
    8 days with some rainfall
  • 20°C minimum night-time temperature in May in Kailua, Oahu20
    20°C min night temperature
  • 13 hours of daylight per day in May in Kailua, Oahu13
    13 hours of daylight per day
  • Moderate heat & humidity in May in Kailua, OahuM
    Moderate heat & humidity
  • 35 mm monthly rainfall in May in Kailua, Oahu35
    35 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Kailua, Oahu11
    11 (Extreme) UV index
  • 25°C sea temperature in May in Kailua, Oahu25
    25°C sea temperature

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Kailua, Oahu weather in June

Expect daytime maximum temperatures of 29°C in Kailua, Oahu, Hawaii in June based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 29°C maximum daytime temperature in June in Kailua, Oahu29
    29°C max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in June in Kailua, Oahu6
    6 days with some rainfall
  • 21°C minimum night-time temperature in June in Kailua, Oahu21
    21°C min night temperature
  • 13 hours of daylight per day in June in Kailua, Oahu13
    13 hours of daylight per day
  • Moderate heat & humidity in June in Kailua, OahuM
    Moderate heat & humidity
  • 27 mm monthly rainfall in June in Kailua, Oahu27
    27 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Kailua, Oahu11
    11+ (Extreme) UV index
  • 25°C sea temperature in June in Kailua, Oahu25
    25°C sea temperature

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Kailua, Oahu weather in July

Expect daytime maximum temperatures of 30°C in Kailua, Oahu, Hawaii in July based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 41 mm of rainfall in the month.

  • 30°C maximum daytime temperature in July in Kailua, Oahu30
    30°C max day temperature
  • 10 hours of sunshine per day
  • 8 days with some rainfall in July in Kailua, Oahu8
    8 days with some rainfall
  • 22°C minimum night-time temperature in July in Kailua, Oahu22
    22°C min night temperature
  • 13 hours of daylight per day in July in Kailua, Oahu13
    13 hours of daylight per day
  • Moderate heat & humidity in July in Kailua, OahuM
    Moderate heat & humidity
  • 41 mm monthly rainfall in July in Kailua, Oahu41
    41 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Kailua, Oahu11
    11+ (Extreme) UV index
  • 26°C sea temperature in July in Kailua, Oahu26
    26°C sea temperature

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Kailua, Oahu weather in August

Expect daytime maximum temperatures of 31°C in Kailua, Oahu, Hawaii in August and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 31°C maximum daytime temperature in August in Kailua, Oahu31
    31°C max day temperature
  • 10 hours of sunshine per day
  • 7 days with some rainfall in August in Kailua, Oahu7
    7 days with some rainfall
  • 22°C minimum night-time temperature in August in Kailua, Oahu22
    22°C min night temperature
  • 13 hours of daylight per day in August in Kailua, Oahu13
    13 hours of daylight per day
  • High heat & humidity in August in Kailua, OahuH
    High heat & humidity
  • 38 mm monthly rainfall in August in Kailua, Oahu38
    38 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Kailua, Oahu11
    11+ (Extreme) UV index
  • 26°C sea temperature in August in Kailua, Oahu26
    26°C sea temperature

Back to months

Kailua, Oahu weather in September

Expect daytime maximum temperatures of 30°C in Kailua, Oahu, Hawaii in September and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 44 mm of rainfall in the month.

  • 30°C maximum daytime temperature in September in Kailua, Oahu30
    30°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in September in Kailua, Oahu8
    8 days with some rainfall
  • 22°C minimum night-time temperature in September in Kailua, Oahu22
    22°C min night temperature
  • 12 hours of daylight per day in September in Kailua, Oahu12
    12 hours of daylight per day
  • High heat & humidity in September in Kailua, OahuH
    High heat & humidity
  • 44 mm monthly rainfall in September in Kailua, Oahu44
    44 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Kailua, Oahu11
    11 (Extreme) UV index
  • 27°C sea temperature in September in Kailua, Oahu27
    27°C sea temperature

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Kailua, Oahu weather in October

Expect daytime maximum temperatures of 29°C in Kailua, Oahu, Hawaii in October based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 76 mm of rainfall in the month.

  • 29°C maximum daytime temperature in October in Kailua, Oahu29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in October in Kailua, Oahu9
    9 days with some rainfall
  • 21°C minimum night-time temperature in October in Kailua, Oahu21
    21°C min night temperature
  • 12 hours of daylight per day in October in Kailua, Oahu12
    12 hours of daylight per day
  • Moderate heat & humidity in October in Kailua, OahuM
    Moderate heat & humidity
  • 76 mm monthly rainfall in October in Kailua, Oahu76
    76 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in October in Kailua, Oahu9
    9 (Very High) UV index
  • 27°C sea temperature in October in Kailua, Oahu27
    27°C sea temperature

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Kailua, Oahu weather in November

Expect daytime maximum temperatures of 28°C in Kailua, Oahu, Hawaii in November based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 119 mm of rainfall in the month.

  • 28°C maximum daytime temperature in November in Kailua, Oahu28
    28°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in November in Kailua, Oahu10
    10 days with some rainfall
  • 20°C minimum night-time temperature in November in Kailua, Oahu20
    20°C min night temperature
  • 11 hours of daylight per day in November in Kailua, Oahu11
    11 hours of daylight per day
  • Moderate heat & humidity in November in Kailua, OahuM
    Moderate heat & humidity
  • 119 mm monthly rainfall in November in Kailua, Oahu119
    119 mm of monthly rainfall
  • UV (maximum) index 7 (High) in November in Kailua, Oahu7
    7 (High) UV index
  • 26°C sea temperature in November in Kailua, Oahu26
    26°C sea temperature

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Kailua, Oahu weather in December

Expect daytime maximum temperatures of 27°C in Kailua, Oahu, Hawaii in December based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 109 mm of rainfall in the month.

  • 27°C maximum daytime temperature in December in Kailua, Oahu27
    27°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in December in Kailua, Oahu11
    11 days with some rainfall
  • 19°C minimum night-time temperature in December in Kailua, Oahu19
    19°C min night temperature
  • 11 hours of daylight per day in December in Kailua, Oahu11
    11 hours of daylight per day
  • Low heat & humidity in December in Kailua, OahuL
    Low heat & humidity
  • 109 mm monthly rainfall in December in Kailua, Oahu109
    109 mm of monthly rainfall
  • UV (maximum) index 6 (High) in December in Kailua, Oahu6
    6 (High) UV index
  • 25°C sea temperature in December in Kailua, Oahu25
    25°C sea temperature

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More about Kailua, Oahu

Kailua, Oahu by month

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

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The climate guide for Hawaii (Kailua, Oahu) 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 / mm)  |  Imperial (°F / inches)

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Compare Kailua, Oahu weather with the UK

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

Maximum daytime temperature (°C)

Kailua, Oahu, Hawaii, USA
UK (London)
26
7
26
7
27
10
27
13
28
17
29
20
30
22
31
22
30
19
29
15
28
10
27
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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