Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Key West, Florida, United States in September
Weather score65Good
Good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 8.8h per day, so bright days are a strong part of the month. Rainfall averages 166mm, so some wet days are possible.
September weather
Monthly averages
Temp
31°C
Rain
166mm
Sun
8.8h
Sea
30°C
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 166mm, so some wet days are possible.
Bright
Sunshine averages 8.8h per day, so bright days are a strong part of the month.
Warm sea
Sea temperatures average 30°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Key West, Florida, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September is one of Key West's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September166mm average rain
September is one of Key West's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September8.8 hours average sun
September sits close to Key West's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September30°C average sea
September is one of Key West's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to October
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September65 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsMarch to April and November
These months have the strongest weather score in the monthly averages.
Hotels in Key West, Florida, United States
Marriott
La Concha Key West, Autograph CollectionKey West, Florida, USA
The Saint Hotel Key West, Autograph Collection, Adult OnlyKey West, Florida, USA
Courtyard Key West WaterfrontKey West, Florida, USA
Fairfield Inn & Suites Key WestKey West, Florida, USA
Fairfield Inn & Suites Key West at The Keys CollectionKey West, Florida, USA