Key West, Florida Weather in September

September: hot and stormy

September feels sticky from morning to night. Highs reach 30°C, and rain falls on 23 days, often in heavy showers. You may get sun between downpours, but outdoor plans can be interrupted. The sea is warm, though boat trips and beach time depend on the weather.

Try the Ernest Hemingway Home and Museum or the Key West Aquarium when rain sets in. Save a walk along the Historic Seaport for a clearer spell. September falls in hurricane season, so tropical weather can affect flights and water trips.

Events and quieter streets

Key West Brewfest usually brings beer tastings and events around Labor Day weekend. Dates change, so check the festival's schedule before making it part of your trip. Labor Day is also a US public holiday.

If you hate crowds, September is one of the quieter months. It's low season, with fewer visitors and often lower hotel rates than winter. The trade-off is real: heat, frequent rain and a greater chance of storm disruption. January and February are better choices if you want more reliable sightseeing weather.

Make a flexible plan

Keep outdoor plans loose, and don't count on a full day at Fort Zachary Taylor State Park if storms are moving through. Its beach and historic fort are both worth visiting, but neither is much fun in a downpour.

Travelling with kids? The Key West Butterfly & Nature Conservatory gives you a sheltered stop near Duval Street. For a local weather check, follow National Hurricane Center updates before boarding a ferry or going out with a fishing charter. If a storm warning appears, change plans rather than heading offshore.