Key Largo weather by month

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

Temperature in Key Largo (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
24°C maximum daytime temperature in January in Key Largo24
25°C maximum daytime temperature in February in Key Largo25
27°C maximum daytime temperature in March in Key Largo27
28°C maximum daytime temperature in April in Key Largo28
30°C maximum daytime temperature in May in Key Largo30
31°C maximum daytime temperature in June in Key Largo31
32°C maximum daytime temperature in July in Key Largo32
32°C maximum daytime temperature in August in Key Largo32
32°C maximum daytime temperature in September in Key Largo32
30°C maximum daytime temperature in October in Key Largo30
27°C maximum daytime temperature in November in Key Largo27
25°C maximum daytime temperature in December in Key Largo25
Min temperature (night-time)
14°C minimum night-time temperature in January in Key Largo14
14°C minimum night-time temperature in February in Key Largo14
16°C minimum night-time temperature in March in Key Largo16
18°C minimum night-time temperature in April in Key Largo18
21°C minimum night-time temperature in May in Key Largo21
22°C minimum night-time temperature in June in Key Largo22
23°C minimum night-time temperature in July in Key Largo23
23°C minimum night-time temperature in August in Key Largo23
23°C minimum night-time temperature in September in Key Largo23
21°C minimum night-time temperature in October in Key Largo21
18°C minimum night-time temperature in November in Key Largo18
15°C minimum night-time temperature in December in Key Largo15
Heat & Humidity
No heat & humidity in January in Key Largo0
No heat & humidity in February in Key Largo0
Low heat & humidity in March in Key LargoL
Moderate heat & humidity in April in Key LargoM
High heat & humidity in May in Key LargoH
High heat & humidity in June in Key LargoH
Very high heat & humidity in July in Key LargoVH
Very high heat & humidity in August in Key LargoVH
Very high heat & humidity in September in Key LargoVH
High heat & humidity in October in Key LargoH
Moderate heat & humidity in November in Key LargoM
Low heat & humidity in December in Key LargoL
Sea temperature
24°C sea temperature in January in Key Largo24
23°C sea temperature in February in Key Largo23
24°C sea temperature in March in Key Largo24
25°C sea temperature in April in Key Largo25
27°C sea temperature in May in Key Largo27
29°C sea temperature in June in Key Largo29
29°C sea temperature in July in Key Largo29
30°C sea temperature in August in Key Largo30
29°C sea temperature in September in Key Largo29
28°C sea temperature in October in Key Largo28
26°C sea temperature in November in Key Largo26
25°C sea temperature in December in Key Largo25

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

Sunshine & UV index in Key Largo

  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 Key Largo11
11 hours of daylight per day in February in Key Largo11
12 hours of daylight per day in March in Key Largo12
13 hours of daylight per day in April in Key Largo13
13 hours of daylight per day in May in Key Largo13
14 hours of daylight per day in June in Key Largo14
14 hours of daylight per day in July in Key Largo14
13 hours of daylight per day in August in Key Largo13
12 hours of daylight per day in September in Key Largo12
12 hours of daylight per day in October in Key Largo12
11 hours of daylight per day in November in Key Largo11
11 hours of daylight per day in December in Key Largo11
UV Index (Maximum)
UV (maximum) index 6 (High) in January in Key Largo6
UV (maximum) index 8 (Very High) in February in Key Largo8
UV (maximum) index 10 (Very High) in March in Key Largo10
UV (maximum) index 11 (Extreme) in April in Key Largo11
UV (maximum) index 11 (Extreme) in May in Key Largo11
UV (maximum) index 11 (Extreme) in June in Key Largo11
UV (maximum) index 11 (Extreme) in July in Key Largo11
UV (maximum) index 11 (Extreme) in August in Key Largo11
UV (maximum) index 10 (Very High) in September in Key Largo10
UV (maximum) index 8 (Very High) in October in Key Largo8
UV (maximum) index 6 (High) in November in Key Largo6
UV (maximum) index 5 (Moderate) in December in Key Largo5

Rainfall in Key Largo

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
7 days with some rainfall in January in Key Largo7
6 days with some rainfall in February in Key Largo6
6 days with some rainfall in March in Key Largo6
5 days with some rainfall in April in Key Largo5
10 days with some rainfall in May in Key Largo10
15 days with some rainfall in June in Key Largo15
15 days with some rainfall in July in Key Largo15
17 days with some rainfall in August in Key Largo17
17 days with some rainfall in September in Key Largo17
13 days with some rainfall in October in Key Largo13
9 days with some rainfall in November in Key Largo9
6 days with some rainfall in December in Key Largo6
Average monthly rainfall (mm)
51 mm monthly rainfall in January in Key Largo51
49 mm monthly rainfall in February in Key Largo49
57 mm monthly rainfall in March in Key Largo57
62 mm monthly rainfall in April in Key Largo62
168 mm monthly rainfall in May in Key Largo168
253 mm monthly rainfall in June in Key Largo253
150 mm monthly rainfall in July in Key Largo150
166 mm monthly rainfall in August in Key Largo166
213 mm monthly rainfall in September in Key Largo213
179 mm monthly rainfall in October in Key Largo179
55 mm monthly rainfall in November in Key Largo55
36 mm monthly rainfall in December in Key Largo36

More about Key Largo

Key Largo by month

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

Recommended for Florida

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027

TUITUI deal finder

The climate guide for Florida (Key Largo) 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 Key Largo?

Key Largo has a hot tropical climate with a winter dry season.

Key Largo weather in January

Expect daytime maximum temperatures of 24°C in Key Largo, Florida in January based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 51 mm of rainfall in the month.

  • 24°C maximum daytime temperature in January in Key Largo24
    24°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in January in Key Largo7
    7 days with some rainfall
  • 14°C minimum night-time temperature in January in Key Largo14
    14°C min night temperature
  • 11 hours of daylight per day in January in Key Largo11
    11 hours of daylight per day
  • No heat & humidity in January in Key Largo0
    No heat & humidity
  • 51 mm monthly rainfall in January in Key Largo51
    51 mm of monthly rainfall
  • UV (maximum) index 6 (High) in January in Key Largo6
    6 (High) UV index
  • 24°C sea temperature in January in Key Largo24
    24°C sea temperature

Back to months

Key Largo weather in February

Expect daytime maximum temperatures of 25°C in Key Largo, Florida in February based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 49 mm of rainfall in the month.

  • 25°C maximum daytime temperature in February in Key Largo25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 6 days with some rainfall in February in Key Largo6
    6 days with some rainfall
  • 14°C minimum night-time temperature in February in Key Largo14
    14°C min night temperature
  • 11 hours of daylight per day in February in Key Largo11
    11 hours of daylight per day
  • No heat & humidity in February in Key Largo0
    No heat & humidity
  • 49 mm monthly rainfall in February in Key Largo49
    49 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in February in Key Largo8
    8 (Very High) UV index
  • 23°C sea temperature in February in Key Largo23
    23°C sea temperature

Back to months

Key Largo weather in March

Expect daytime maximum temperatures of 27°C in Key Largo, Florida in March based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 57 mm of rainfall in the month.

  • 27°C maximum daytime temperature in March in Key Largo27
    27°C max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in March in Key Largo6
    6 days with some rainfall
  • 16°C minimum night-time temperature in March in Key Largo16
    16°C min night temperature
  • 12 hours of daylight per day in March in Key Largo12
    12 hours of daylight per day
  • Low heat & humidity in March in Key LargoL
    Low heat & humidity
  • 57 mm monthly rainfall in March in Key Largo57
    57 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in March in Key Largo10
    10 (Very High) UV index
  • 24°C sea temperature in March in Key Largo24
    24°C sea temperature

Back to months

Key Largo weather in April

Expect daytime maximum temperatures of 28°C in Key Largo, Florida in April based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 62 mm of rainfall in the month.

  • 28°C maximum daytime temperature in April in Key Largo28
    28°C max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in April in Key Largo5
    5 days with some rainfall
  • 18°C minimum night-time temperature in April in Key Largo18
    18°C min night temperature
  • 13 hours of daylight per day in April in Key Largo13
    13 hours of daylight per day
  • Moderate heat & humidity in April in Key LargoM
    Moderate heat & humidity
  • 62 mm monthly rainfall in April in Key Largo62
    62 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in April in Key Largo11
    11 (Extreme) UV index
  • 25°C sea temperature in April in Key Largo25
    25°C sea temperature

Back to months

Key Largo weather in May

Expect daytime maximum temperatures of 30°C in Key Largo, Florida in May and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 168 mm of rainfall in the month.

  • 30°C maximum daytime temperature in May in Key Largo30
    30°C max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in May in Key Largo10
    10 days with some rainfall
  • 21°C minimum night-time temperature in May in Key Largo21
    21°C min night temperature
  • 13 hours of daylight per day in May in Key Largo13
    13 hours of daylight per day
  • High heat & humidity in May in Key LargoH
    High heat & humidity
  • 168 mm monthly rainfall in May in Key Largo168
    168 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Key Largo11
    11 (Extreme) UV index
  • 27°C sea temperature in May in Key Largo27
    27°C sea temperature

Back to months

Key Largo weather in June

Expect daytime maximum temperatures of 31°C in Key Largo, Florida in June and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 15 days with some rainfall and typically 253 mm of rainfall in the month.

  • 31°C maximum daytime temperature in June in Key Largo31
    31°C max day temperature
  • 10 hours of sunshine per day
  • 15 days with some rainfall in June in Key Largo15
    15 days with some rainfall
  • 22°C minimum night-time temperature in June in Key Largo22
    22°C min night temperature
  • 14 hours of daylight per day in June in Key Largo14
    14 hours of daylight per day
  • High heat & humidity in June in Key LargoH
    High heat & humidity
  • 253 mm monthly rainfall in June in Key Largo253
    253 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in June in Key Largo11
    11 (Extreme) UV index
  • 29°C sea temperature in June in Key Largo29
    29°C sea temperature

Back to months

Key Largo weather in July

Expect daytime maximum temperatures of 32°C in Key Largo, Florida in July and very high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 15 days with some rainfall and typically 150 mm of rainfall in the month.

  • 32°C maximum daytime temperature in July in Key Largo32
    32°C max day temperature
  • 10 hours of sunshine per day
  • 15 days with some rainfall in July in Key Largo15
    15 days with some rainfall
  • 23°C minimum night-time temperature in July in Key Largo23
    23°C min night temperature
  • 14 hours of daylight per day in July in Key Largo14
    14 hours of daylight per day
  • Very high heat & humidity in July in Key LargoVH
    Very High heat & humidity
  • 150 mm monthly rainfall in July in Key Largo150
    150 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in July in Key Largo11
    11 (Extreme) UV index
  • 29°C sea temperature in July in Key Largo29
    29°C sea temperature

Back to months

Key Largo weather in August

Expect daytime maximum temperatures of 32°C in Key Largo, Florida in August and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 17 days with some rainfall and typically 166 mm of rainfall in the month.

  • 32°C maximum daytime temperature in August in Key Largo32
    32°C max day temperature
  • 9 hours of sunshine per day
  • 17 days with some rainfall in August in Key Largo17
    17 days with some rainfall
  • 23°C minimum night-time temperature in August in Key Largo23
    23°C min night temperature
  • 13 hours of daylight per day in August in Key Largo13
    13 hours of daylight per day
  • Very high heat & humidity in August in Key LargoVH
    Very High heat & humidity
  • 166 mm monthly rainfall in August in Key Largo166
    166 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in August in Key Largo11
    11 (Extreme) UV index
  • 30°C sea temperature in August in Key Largo30
    30°C sea temperature

Back to months

Key Largo weather in September

Expect daytime maximum temperatures of 32°C in Key Largo, Florida in September and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 17 days with some rainfall and typically 213 mm of rainfall in the month.

  • 32°C maximum daytime temperature in September in Key Largo32
    32°C max day temperature
  • 9 hours of sunshine per day
  • 17 days with some rainfall in September in Key Largo17
    17 days with some rainfall
  • 23°C minimum night-time temperature in September in Key Largo23
    23°C min night temperature
  • 12 hours of daylight per day in September in Key Largo12
    12 hours of daylight per day
  • Very high heat & humidity in September in Key LargoVH
    Very High heat & humidity
  • 213 mm monthly rainfall in September in Key Largo213
    213 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Key Largo10
    10 (Very High) UV index
  • 29°C sea temperature in September in Key Largo29
    29°C sea temperature

Back to months

Key Largo weather in October

Expect daytime maximum temperatures of 30°C in Key Largo, Florida in October and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 179 mm of rainfall in the month.

  • 30°C maximum daytime temperature in October in Key Largo30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in October in Key Largo13
    13 days with some rainfall
  • 21°C minimum night-time temperature in October in Key Largo21
    21°C min night temperature
  • 12 hours of daylight per day in October in Key Largo12
    12 hours of daylight per day
  • High heat & humidity in October in Key LargoH
    High heat & humidity
  • 179 mm monthly rainfall in October in Key Largo179
    179 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in October in Key Largo8
    8 (Very High) UV index
  • 28°C sea temperature in October in Key Largo28
    28°C sea temperature

Back to months

Key Largo weather in November

Expect daytime maximum temperatures of 27°C in Key Largo, Florida in November based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 55 mm of rainfall in the month.

  • 27°C maximum daytime temperature in November in Key Largo27
    27°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in November in Key Largo9
    9 days with some rainfall
  • 18°C minimum night-time temperature in November in Key Largo18
    18°C min night temperature
  • 11 hours of daylight per day in November in Key Largo11
    11 hours of daylight per day
  • Moderate heat & humidity in November in Key LargoM
    Moderate heat & humidity
  • 55 mm monthly rainfall in November in Key Largo55
    55 mm of monthly rainfall
  • UV (maximum) index 6 (High) in November in Key Largo6
    6 (High) UV index
  • 26°C sea temperature in November in Key Largo26
    26°C sea temperature

Back to months

Key Largo weather in December

Expect daytime maximum temperatures of 25°C in Key Largo, Florida in December based on long-term weather averages. There are 7 hours of sunshine per day on average.

  • 25°C maximum daytime temperature in December in Key Largo25
    25°C max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in December in Key Largo6
    6 days with some rainfall
  • 15°C minimum night-time temperature in December in Key Largo15
    15°C min night temperature
  • 11 hours of daylight per day in December in Key Largo11
    11 hours of daylight per day
  • Low heat & humidity in December in Key LargoL
    Low heat & humidity
  • 36 mm monthly rainfall in December in Key Largo36
    36 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in December in Key Largo5
    5 (Moderate) UV index
  • 25°C sea temperature in December in Key Largo25
    25°C sea temperature

Back to months

More about Key Largo

Key Largo by month

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

Recommended for Florida

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027

TUITUI deal finder

The climate guide for Florida (Key Largo) 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.

Tropical storm risk: Key Largo, Florida hurricane season

% of month affected by tropical storms
0
0
0
0
0
1.8%
0
2.9%
2.8%
2.3%
<1%
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Key Largo weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Key Largo, Florida, USA and the UK (London).

Maximum daytime temperature (°C)

Key Largo, Florida, USA
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

Compare more weather >>

Back to top

More about Florida

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^