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Key West weather in August 2025
Expect 32°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Key West in August based on long-term weather averages. There is usually 15 days with some rainfall and 125 mm of average monthly rainfall in August.
- 32°C max day temperature
32 - 10 hours of sunshine per day
- 15 days with some rainfall
15 - 26°C min night temperature
26 - 13 hours of daylight per day
13 - Very High heat & humidity
VH - 125 mm of monthly rainfall
125 - 11 (Extreme) UV index
11 - 30°C sea temperature
30
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The August weather guide for Florida (Key West) shows long term 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)
More about Florida
How hot is it in Key West in August?
Daytime temperatures usually reach 32°C in Key West in August with very high heat and humidity, falling to 26°C at night.
How sunny is it in Key West in August?
There are normally 10 hours of bright sunshine each day in Key West in August - that's 74% of daylight hours.
How warm is the sea around Key West in August?
The average sea temperature around Key West in August is 30°C.
Does it rain in Key West in August?
There are usually 15 days with some rain in Key West in August and the average monthly rainfall is 125mm.
What is the chance of a hurricane in Key West in August?
On average less than 1 day in August in Key West is likely to be affected by the passage of one or more tropical storms.
Key West August sunrise & sunset times
Browse the sunrise and sunset times for Key West in August 2025. Select a month to view Key West sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Friday, 1st August 2025 | 05:56 | 19:11 |
| Saturday, 16th August 2025 | 06:02 | 19:00 |
| Sunday, 31st August 2025 | 06:08 | 18:46 |
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