Key West weather in September (Florida, United States of America)
How is September weather typically in Key West? Discover if this is the best time for your journey with our detailed monthly weather breakdown.
Temperatures
In September, Key West tends to experience very high temperatures and heavy rainfall. Daytime temperatures generally settle around 32°C, while nighttime can see a dip to about 26°C. Note that these temperatures are average, but some days may be hotter. Dress in cool, breathable fabrics to stay comfortable in the heat.
Precipitation
Key West in September usually receives heavy rainfall, averaging around 163 mm for the month. In this month, the heaviest downpours of the year are not uncommon. Carrying a poncho might be your best bet to stay dry. Analyzing past climate data, one can expect approximately 23 days of rain.Average sunshine
The city usually sees around 271 hours of sunlight, indicating many sunny days.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Key West. January, February, March, April, November and December typically offer the most optimal weather. In contrast, July, August, September and October tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Key West climate page with graphs.
Key West, monthly averages in September
Min Temperature
26°C
Max Temperature
32°C
Water Temperature
30°C
Chance of Rain
76%
Precipitation
163 mm
Rainy days
23 days
Humidity
75%
Sunshine
271 hours
Percentage Sunshine
73%
Where to go in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in this month?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case. With a water temperature of around 30°C this is a great month to swim so bring your swimwear.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in Key West.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
