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When is the best time to visit Key West?
In general the best time to visit Key West is probably September, when the weather is usually great. The hottest months are July, August, September, while the coldest months are January, February, March.
Depending on the activities you want to experience, you may choose different months to visit:
- The best time for a sunbathing holiday is July, August, September. Average maximum temperatures are up to +30°C in September and it has 2 sunny days on average.
- In general, it’s pleasant to walk and do outdoor activities during January - December.
- If you want to avoid wet weather, then your choice is October, November, December with the lowest chance of rain.
Average weather in Key West in different months
This is the average weather in Key West for each month based on historic data:
January, February, March, April, May, July, December usually has good weather. Average maximum temperature reaches +30°C during July.
In June, August, September, October, November the weather is average. Expect around 91 rainy days, and the precipitation amounts to approximately 173 mm in September.
Climate in Key West
Here is the detailed breakdown of the climate in Key West for each month:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum Temperature | |||||||||||
| +28°C | +30°C | +30°C | +32°C | +33°C | +34°C | +35°C | +35°C | +38°C | +33°C | +31°C | +29°C |
| Average Maximum Temperature | |||||||||||
| +23°C | +23°C | +24°C | +26°C | +28°C | +29°C | +30°C | +30°C | +30°C | +28°C | +26°C | +24°C |
| Minimum Temperature | |||||||||||
| +8°C | +9°C | +11°C | +14°C | +18°C | +22°C | +23°C | +23°C | +23°C | +16°C | +12°C | +8°C |
| Avg. water temperature | |||||||||||
| - | - | - | - | - | - | - | - | - | - | - | - |
| Humidity, % | |||||||||||
| 76 | 76 | 74 | 73 | 74 | 76 | 74 | 75 | 76 | 76 | 76 | 76 |
| Rain, mm | |||||||||||
| 46 | 38 | 41 | 46 | 84 | 129 | 96 | 129 | 173 | 133 | 63 | 50 |
| Snow, mm | |||||||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Average wind speed, m/s | |||||||||||
| 5 | 5 | 5 | 5 | 4 | 3 | 3 | 3 | 3 | 4 | 5 | 5 |
| Sunny Days | |||||||||||
| 10 | 10 | 13 | 13 | 10 | 5 | 4 | 3 | 2 | 6 | 8 | 8 |
| Cloud Days | |||||||||||
| 10 | 9 | 8 | 7 | 6 | 4 | 4 | 3 | 2 | 4 | 7 | 10 |
| Rainy Days | |||||||||||
| 11 | 9 | 9 | 10 | 14 | 17 | 15 | 18 | 21 | 20 | 15 | 13 |
| Snowy Days | |||||||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Average Temperature
Here are the average maximum and minimum temperatures in Key West during the whole year:
The hottest month in Key West is September with average maximum temperature going up to +30°C. The coldest month is January with the lowest temperatures of +20°C.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Key West looks throughout the year, in %:
The most humid month in Key West is December with average humidity going up to 76%. The least humid month is April with an average humidity of 73%.
Rain
Amount of rainfall in mm. in Key West during the whole year based on historical data:
The sunniest and driest month is March with approximately 13 sunny days and a total precipitation of around 41 mm. The rainiest and wettest month is September with approximately 21 rainy days and 173 mm of total precipitation.
FAQ
Frequently asked questions about the weather in Key West:
What is the hottest month in Key West?
The hottest month in Key West is September with average maximum temperature of +30°C.
What is the coldest month in Key West?
The coldest month in Key West is January with minimum temperatures of +20°C.
Is Key West worth visiting in winter?
If you are planning to visit Key West in winter you can expect pretty good weather. The best month is September with +30°C and 2 sunny days.
When does it rain the least in Key West?
if you're looking to visit Key West when it rains the least, you should plan your trip for September, October, August. During this time, rainfall is rare with the driest month being February with only 38 mm of rain.
Other cities in USA
Check out the weather for other cities in USA.
Monthly weather in Key West
Source of the data
For this page, we’ve looked at the typical weather in Key West, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
