Key West weather by month

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

Temperature in Key West (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
75°F maximum daytime temperature in January in Key West75
75°F maximum daytime temperature in February in Key West75
79°F maximum daytime temperature in March in Key West79
82°F maximum daytime temperature in April in Key West82
84°F maximum daytime temperature in May in Key West84
88°F maximum daytime temperature in June in Key West88
90°F maximum daytime temperature in July in Key West90
90°F maximum daytime temperature in August in Key West90
88°F maximum daytime temperature in September in Key West88
84°F maximum daytime temperature in October in Key West84
81°F maximum daytime temperature in November in Key West81
75°F maximum daytime temperature in December in Key West75
Min temperature (night-time)
63°F minimum night-time temperature in January in Key West63
63°F minimum night-time temperature in February in Key West63
68°F minimum night-time temperature in March in Key West68
70°F minimum night-time temperature in April in Key West70
73°F minimum night-time temperature in May in Key West73
77°F minimum night-time temperature in June in Key West77
77°F minimum night-time temperature in July in Key West77
79°F minimum night-time temperature in August in Key West79
77°F minimum night-time temperature in September in Key West77
73°F minimum night-time temperature in October in Key West73
68°F minimum night-time temperature in November in Key West68
64°F minimum night-time temperature in December in Key West64
Heat & Humidity
No heat & humidity in January in Key West0
No heat & humidity in February in Key West0
Low heat & humidity in March in Key WestL
Moderate heat & humidity in April in Key WestM
High heat & humidity in May in Key WestH
High heat & humidity in June in Key WestH
Very high heat & humidity in July in Key WestVH
Very high heat & humidity in August in Key WestVH
Very high heat & humidity in September in Key WestVH
High heat & humidity in October in Key WestH
Moderate heat & humidity in November in Key WestM
Low heat & humidity in December in Key WestL
Sea temperature
73°F sea temperature in January in Key West73
72°F sea temperature in February in Key West72
73°F sea temperature in March in Key West73
77°F sea temperature in April in Key West77
81°F sea temperature in May in Key West81
84°F sea temperature in June in Key West84
86°F sea temperature in July in Key West86
86°F sea temperature in August in Key West86
84°F sea temperature in September in Key West84
82°F sea temperature in October in Key West82
79°F sea temperature in November in Key West79
75°F sea temperature in December in Key West75

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

Sunshine & Daylight in Key West

  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 West11
11 hours of daylight per day in February in Key West11
12 hours of daylight per day in March in Key West12
13 hours of daylight per day in April in Key West13
13 hours of daylight per day in May in Key West13
14 hours of daylight per day in June in Key West14
13 hours of daylight per day in July in Key West13
13 hours of daylight per day in August in Key West13
12 hours of daylight per day in September in Key West12
12 hours of daylight per day in October in Key West12
11 hours of daylight per day in November in Key West11
11 hours of daylight per day in December in Key West11
UV Index (Maximum)
UV (maximum) index 6 (High) in January in Key West6
UV (maximum) index 8 (Very High) in February in Key West8
UV (maximum) index 10 (Very High) in March in Key West10
UV (maximum) index 11 (Extreme) in April in Key West11
UV (maximum) index 11 (Extreme) in May in Key West11
UV (maximum) index 11 (Extreme) in June in Key West11
UV (maximum) index 11 (Extreme) in July in Key West11
UV (maximum) index 11 (Extreme) in August in Key West11
UV (maximum) index 10 (Very High) in September in Key West10
UV (maximum) index 9 (Very High) in October in Key West9
UV (maximum) index 7 (High) in November in Key West7
UV (maximum) index 6 (High) in December in Key West6

Rainfall in Key West

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
6 days with some rainfall in January in Key West6
6 days with some rainfall in February in Key West6
5 days with some rainfall in March in Key West5
4 days with some rainfall in April in Key West4
8 days with some rainfall in May in Key West8
12 days with some rainfall in June in Key West12
12 days with some rainfall in July in Key West12
15 days with some rainfall in August in Key West15
15 days with some rainfall in September in Key West15
11 days with some rainfall in October in Key West11
7 days with some rainfall in November in Key West7
6 days with some rainfall in December in Key West6
Average monthly rainfall (inches)
1.9 inches monthly rainfall in January in Key West1.9
1.9 inches monthly rainfall in February in Key West1.9
1.6 inches monthly rainfall in March in Key West1.6
1.8 inches monthly rainfall in April in Key West1.8
4.2 inches monthly rainfall in May in Key West4.2
5.7 inches monthly rainfall in June in Key West5.7
4.1 inches monthly rainfall in July in Key West4.1
4.9 inches monthly rainfall in August in Key West4.9
6.5 inches monthly rainfall in September in Key West6.5
4.5 inches monthly rainfall in October in Key West4.5
2.0 inches monthly rainfall in November in Key West2.0
1.8 inches monthly rainfall in December in Key West1.8

More about Key West

Key West by month

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

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The climate guide for Florida (Key West) 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 West?

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

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Key West, Florida hurricane season

% of month affected by tropical storms
0
0
0
0
0
1.9%
0
2.6%
2.8%
2.3%
<1%
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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  • Pay £0 deposits with direct debit & spread the cost
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More about Florida

Compare Key West with the USA

Below the Key West chart shows average maximum daytime temperature for Key West, Florida, USA and the USA (Washington).

Maximum daytime temperature (°F)

Key West, Florida, USA
USA (Washington)
75
41
75
45
79
55
82
66
84
75
88
84
90
88
90
86
88
79
84
68
81
57
75
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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