Key West (FL) Climate by Month
Temperatures see a moderate degree of fluctuation,
transitioning from very warm conditions
to warm.
It also experiences much rainfall throughout the year.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
The weather in Key West changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a very warm 32°C in August. In January, the coolest month of the year, temperatures drop to a comfortable 24°C. At night, expect cooler temperatures, averaging 19°C during this month.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Key West is known for its substantial rainfall, with annual precipitation reaching 1007 mm. Key West can be quite wet during September, receiving approximately 163 mm of precipitation over 23 rainy days. In contrast March, experiences much drier conditions, with 27 mm of rainfall, spread across 7 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Key West experiences moderate variation in sunshine hours across the seasons. With 11.4 hours daily sunshine in May, it dips to 7.7 hours in November, offering a balanced mix of sunny and overcast days.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year in Key West ranges from 22°C in January to 31°C in August.
Water temperature over the year
Average humidity
The relative humidity is moderate throughout the year in Key West.
Relative humidity over the year
The best time of year to visit Key West in the United States of America
During the months of January, February, March and December you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Most rainfall (rainy season) is seen in September and October.
August has an average maximum temperature of 32°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 24°C.
September tops the wettest month list with 163 mm of rainfall.
March is the driest month with 27 mm of precipitation.
May is the sunniest month with an average of 341 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
