Yearly weather and climate in Key West, United States
The yearly weather in Key West runs from around 21°C in January to 30°C in July. November is the driest month at 4 rainy days; August the wettest at 23. Here is the annual climate data, so you know what you are packing for.
Best time to visit
The best weather is typically in Jan, Feb, Mar, Apr, May, Nov, Dec, with mild temperatures and lower rainfall.
Sunshine
Expect up to 12.8 hours of clear skies in May, but only 8.5 hours in Dec. Pack sunglasses and SPF accordingly.
Rainfall
It rains the most in Jun (202mm over 19 days). A reliable rain jacket is a must-have if visiting then.
Day-to-night swings
Temperatures typically drop by 2°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Key West, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 2374°2169°6Jan
- 2374°2171°7Feb
- 2577°2374°7Mar
- 2679°2475°7Apr
- 2882°2678°7May
- 2984°2780°19Jun
- 3087°2882°16Jul
- 3087°2882°23Aug
- 3086°2781°19Sep
- 2882°2679°14Oct
- 2679°2476°4Nov
- 2374°2170°8Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Nov is typically driest at 4 days (73mm); Aug the wettest at 23 days (195mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 23°C | 21°C | 6 | 19mm |
| Feb | 23°C | 21°C | 7 | 32mm |
| Mar | 25°C | 23°C | 7 | 60mm |
| Apr | 26°C | 24°C | 7 | 46mm |
| May | 28°C | 26°C | 7 | 57mm |
| Jun | 29°C | 27°C | 19 | 202mm |
| Jul | 30°C | 28°C | 16 | 81mm |
| Aug | 30°C | 28°C | 23 | 195mm |
| Sep | 30°C | 27°C | 19 | 148mm |
| Oct | 28°C | 26°C | 14 | 142mm |
| Nov | 26°C | 24°C | 4 | 73mm |
| Dec | 23°C | 21°C | 8 | 114mm |
Weather data by Open-Meteo.com
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