Key West Weather in September
United States · 30-year monthly averages
⚠️ Challenging time to visit
September in Key West is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 26°C (79°F). Expect roughly 184mm of precipitation, and this is one of the wetter months.
Avg high
32°C
89°F
Avg low
26°C
79°F
Rainfall
184mm
rainy
Mean temp
29°C
84°F
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Key West in September?
- September in Key West is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 26°C (79°F). Expect roughly 184mm of precipitation, and this is one of the wetter months.
- Does it rain a lot in Key West in September?
- Key West sees around 184mm of precipitation in September on average — rainy by global standards.
- Is September a good time to visit Key West?
- September is a challenging month to visit Key West weather-wise — plan around the conditions.