Month guide · Key West · United States
Key West in September
What September is really like in Key West: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Marc Averette, CC BY-SA 3.0
Quick answer
September is a month many travellers avoid. Expect average highs of 31°C (88°F), lows of 26°C (79°F), about 13 rainy days and roughly 12.3 hours of daylight. Peak hurricane season and the quietest month; some businesses close for staff holidays.
Key facts
- Average high / low
- 31°C (88°F) / 26°C (79°F)
- Rainy days
- About 13
- Daylight
- About 12.3 hours
- Sea temperature
- 30°C (86°F)
- Crowds
- Very quiet
- Hotel prices
- Lowest
Weather in September
September is the 4th-warmest month in Key West: days average 31°C (88°F) against a yearly average high of 28°C (82°F), and nights fall to about 26°C (79°F). Rain falls on roughly 13 of its 30 days. Compared with August (32°C (90°F)), September is about as warm; by October highs drop to around 29°C (84°F).
- Sunrise (15 September)
- About 07:13
- Sunset (15 September)
- About 19:31
- Daylight
- About 12.3 hours
- Sea
- 30°C (86°F)
Summer (June–August). Hot and humid with brief tropical downpours, very warm sea and lower prices; hurricane season is under way.
Crowds and prices
On a 1–5 scale, September rates 1 for crowds (the peak is January at 5) and 1 for hotel prices (highest in January). That makes September one of the better-value months to book.
Events in September
September has no major recurring festival in Key West, which usually means easier bookings.
What to do in September
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Beach · Truman Annex
Fort Zachary Taylor Historic State Park
Wear water shoes; the beach is rocky and coral rubble underfoot, and fish gather around the rock groynes.
- Time needed
- Half a day
- Cost
- Low cost
- Kids
- Outdoors
- History
- Nature
Experience · Historic Seaport
Snorkelling and diving on the Florida Reef
Catamarans and dive boats leave Key West Bight for reef sites such as Sand Key, where shallow coral heads hold parrotfish, angelfish and sometimes turtles and nurse sharks.
- Time needed
- Half a day
- Cost
- Expensive
- Kids
- Nature
- Active
- Outdoors
Landmark · Bahama Village
Key West Lighthouse and Keeper's Quarters
It is opposite the Hemingway Home, so climb it straight after your tour.
- Time needed
- 45 minutes
- Cost
- Low cost
- Views
- Kids
- History
Historic site · Old Town and Duval Street
Key West Cemetery
Founded in 1847, the city cemetery has above-ground vaults because of the high water table, a memorial to sailors of the USS Maine, and witty epitaphs such as 'I told you I was sick'.
- Time needed
- 45 minutes
- Cost
- Free
- Free
- History
- Off the beaten path
The sea averages 30°C (86°F) — warm enough to swim. Best beaches near Key West.
What to pack
For highs near 31°C, lows near 26°C and 13 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; a compact umbrella and waterproof shoes — rain is frequent; comfortable walking shoes.
Is September a good time to visit Key West?
A month many travellers avoid. If your dates are flexible, December–May are better overall. Compare every month.
Key West in other months
Questions travellers ask
+Is September a good time to visit Key West?
It is a month many travellers avoid. Peak hurricane season and the quietest month; some businesses close for staff holidays.
+How warm is Key West in September?
Average highs are around 31°C (88°F) and lows around 26°C (79°F).
+Does it rain a lot in Key West in September?
Expect rain on about 13 days of the month, so pack for wet weather.