Key West weather

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Usually in September
- 31
- 25
- 9
Weather by month
Now Today
- 31
- 7
5-day forecast

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Recommended for Florida

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

The weather guide for Key West, Florida shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

Which is the hottest month in Key West?

The hottest time of year in Key West is normally August. Expect maximum daytime temperatures to reach 32°C with very high heat and humidity.

Which month has the most rain in Key West?

In terms of rainfall, September is usually the wettest month in Key West with 166mm on average. There are normally 15 days in September with some rain.

When is it sunniest in Key West?

The sunniest time of year in Key West is normally April with bright sunshine on average for 83% of daylight hours; that's 11 hours of sunshine per day.

When is the sea warmest in Key West?

The sea is usually at its warmest in Key West in August when the water temperature reaches 30°C.

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

Compare Key West weather with the USA

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

Maximum daytime temperature (°C)

Key West, Florida, USA

USA (Washington)

Jan

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Aug

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

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TUI discount code: £150 off summer 2021 holidays

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Save £100 on summer 2021 holidays with TUI
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Plus testing packages + Covid cover & free changes
Travel before 31st October 2021 (inclusive)

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Tropical storm risk: Key West, Florida hurricane season

% of month affected by tropical storms

1.9%

2.6%

2.8%

2.3%

<1%

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The Key West, Florida tropical storm risk chart above shows the hurricane season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms