Temperatures in December
It's warm in December in Key West with an average temperature of 26°C. Temperatures this month range from a low of 25°C to a high of 27°C. At night, you can expect temperatures between 20°C and 23°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Key West in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Key West with hot temperatures, averaging around 27°C during the day and nights close to 23°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature stays the same at 27°C, with nights close to 22°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers.
End of December
By the end of December, the average daytime temperature in Key West will be around 26°C, with nights close to 22°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers.
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Water temperature
The water temperature at Key West is 25°C this month. Lovely temperature for a swim.
Precipitation in December
In December, there is an average of 77 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the East.
The precipitation chance averages 17% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Key West. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Key West in December |
London | ||
|---|---|---|---|
 Average Temperature |
26°C | 9°C | |
 High Temp |
27°C | 11°C | |
| Low Temp |
25°C | 8°C | |
 Total Precipitation |
77 mm | 67 mm | |
| Rainy Days |
5 days | 10 days | |
November
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is December a good time to visit Key West?
Want nice weather? Then December is a great time to be in Key West. You’ll have pleasant temperatures and not too much rain this month.
The hurricane season in Key West runs from June to November.
Temperature records for Key West in December
With 30°C, Key West hit the highest temperature in the last 10 years in December 2018. The lowest daytime temperature in this month was 15°C in 2022. The extreme night temperatures ranged from a low of 11°C to a high of 28°C.
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Daily Temperature in December in Key West
This chart shows the average daily temperatures, both day and night, for each day in December in Key West, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Key West
The chart below shows the average daily precipitation in December for Key West, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 5 days of rain in Key West.
Daily UV Index in December in Key West
This chart shows the average daily UV index in December in Key West, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in Key West Over the Years
This chart shows the average temperature in December in Key West, measured in degrees Celsius, over the past years.
Total Precipitation in December in Key West Over the Years
This chart shows the average precipitation in December in Key West, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for Key West
Click on a specific day in December for detailed info on the typical weather on that day in Key West. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Key West
Have you been to Key West in December?
Share your weather experience in December in Key West.
Average Weather in Key West by Month
Click on a month below to see detailed weather info for Key West. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
