United StatesAverage weather for Key West 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.
Start of December
The month of December starts in Key West with hot temps, averaging around 27°C during the day and nights around 23°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid December
By mid-December, daytime temps stay steady at around 27°C, with nights around 22°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers.
End of December
By the end of December, the average daytime temperature in Key West is around 26°C, while nighttime temps are about 22°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended.
Water temperature
The water temperature at Key West is 25°C this month. Lovely temperature for a swim.
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.
Key West in December |
New York | ||
|---|---|---|---|
 Average temperature |
26°C | 9°C | |
 Max. temperature |
27°C | 12°C | |
| Min. temperature |
25°C | -5°C | |
 Total precipitation |
77 mm | 133 mm | |
| Rainy days |
5 days | 17 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?
Looking for great weather? December is a good time to be in Key West. The temperatures are nice, and there’s not too much rain.
The hurricane season in Key West runs from June to November.
Temperature records
With 30°C in 2018, Key West reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 15°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 28°C.
Check out the climate of Key West for all months and discover the best travel time
Daily Temperature in December in Key West
This chart shows the average daily high and low temperatures in December for Key West, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Key West
The chart below shows the average daily precipitation in December for Key West, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 5 days of precipitation 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 few years.
Total precipitation in December in Key West over the years
This chart shows the average precipitation in December in Key West, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in December for Key West
Click on any day in December to get detailed info about the usual 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.
