United StatesAverage weather for Key West in January
It's warm in January in Key West with an average temperature of 24°C. Temperatures this month range from a low of 22°C to a high of 27°C. At night, you can expect temperatures between 17°C and 23°C.
Start of January
The month of January starts in Key West with warm temps, averaging around 26°C during the day and nights around 21°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
Mid January
By mid-January, daytime temps drop to around 24°C, with nights around 20°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of January
By the end of January, the average daytime temperature in Key West is around 24°C, while nighttime temps are about 19°C. A shower might pop up, but overall, the weather will be dry and sunny.
Water temperature
The water temperature at Key West is 24°C this month. Comfortable for a swim.
In January, there is an average of 42 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Key West in January |
New York | ||
|---|---|---|---|
 Average temperature |
24°C | 5°C | |
 Max. temperature |
27°C | 11°C | |
| Min. temperature |
22°C | -5°C | |
 Total precipitation |
42 mm | 97 mm | |
| Rainy days |
5 days | 12 days | |
December
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 January a good time to visit Key West?
Looking for great weather? January is a good time to be in Key West. The temperatures are nice, and there’s not too much rain.
Temperature records
With 29°C in 2016, Key West reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 14°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 10°C to a highest value of 26°C.
Check out the climate of Key West for all months and discover the best travel time
Daily Temperature in January in Key West
This chart shows the average daily high and low temperatures in January 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 January in Key West
The chart below shows the average daily precipitation in January 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 January, you can expect about 5 days of precipitation in Key West.
Daily UV index in January in Key West
This chart shows the average daily UV index in January 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 January in Key West over the years
This chart shows the average temperature in January in Key West, measured in degrees Celsius, over the past few years.
Total precipitation in January in Key West over the years
This chart shows the average precipitation in January 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 January for Key West
Click on any day in January 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 January in Key West
Have you been to Key West in January?
Share your weather experience in January 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.
