Key WestPhoto: Ebyabe · CC BY-SA 3.0USA · North America
Best time to visit Key West
Key West at the end of the Florida Keys blends colourful colonial houses, Hemingway flair and Caribbean sunsets. Warm all year; wetter and muggier in late summer.
Climate decision
Best travel months for Key West
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Next highest scores
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
December · Monthly precipitation
101.3 mm/month
1991–2025: 54 mm/month
+47.3 mm/month · higher
June · Wet days
27.4 days/month
1991–2025: 23.5 days/month
+3.9 days/month · higher
March · Mean daily maximum
25 °C
1991–2025: 24 °C
+1 °C · higher
August · Sea temperature
30.7 °C
1991–2025: 30.1 °C
+0.6 °C · higher
July: 104/155 days at or above 30 °C; highest single value 32 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Coast and sea
Key West: the swimming season follows two curves
Average daily highs vary by 6.9 °C through the year, while the sea varies by 7.4 °C. Air and water temperature should therefore be considered separately.
The practical difference
The month with the highest daytime temperature and the month with the warmest sea need not define the same travel window. Rain and sunshine help resolve the trade-off.
Warmest sea
August · 30.1 °C
Highest average daily high
August · 29.9 °C
Fewest rainy days
February · 5.6
Most sunshine
May · 8.5 h
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| January | 23 | 21 | 7 | 47 | 4.8 | 79 | 5.3 | 23 | 85 |
| February | 23 | 22 | 6 | 40 | 6.0 | 79 | 4.9 | 23 | 88 |
| March | 24 | 23 | 6 | 36 | 7.3 | 77 | 5.1 | 24 | 91 |
| April | 25 | 24 | 8 | 59 | 8.2 | 77 | 5.0 | 25 | 89 |
| May | 27 | 26 | 14 | 100 | 8.5 | 76 | 4.4 | 27 | 74 |
| June | 29 | 28 | 23 | 202 | 7.9 | 78 | 3.9 | 29 | 59 |
| July | 30 | 29 | 25 | 145 | 8.0 | 76 | 3.7 | 30 | 55 |
| August | 30 | 29 | 26 | 188 | 7.6 | 75 | 3.8 | 30 | 52 |
| September | 29 | 29 | 24 | 198 | 6.7 | 77 | 4.0 | 30 | 54 |
| October | 28 | 27 | 17 | 130 | 5.9 | 77 | 5.1 | 28 | 65 |
| November | 26 | 24 | 9 | 55 | 5.1 | 77 | 5.5 | 26 | 85 |
| December | 24 | 23 | 8 | 54 | 4.5 | 79 | 5.3 | 24 | 86 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
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Where to stay in Key West
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The number is the overall climate score, not a similarity score.
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Frequently asked questions
When is the best time to visit Key West?
The strongest climate months are February, March, April, December. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Key West?
The average daily maximum temperature in Key West is highest in August at around 30 °C.
When is the sea warmest at Key West?
In August, at around 30 °C.