Early autumn · Weather & things to do
Bahia Honda & the Lower Keys in September
The year's rain peaks now, with about 6.6 in (167 mm) falling in Bahia Honda & the Lower Keys, alongside highs near 85°F (29°C) and lows of 83°F (28°C).
With a comfort score of 59/100 (12th of 12), it's one of the toughest months, held back mainly by rain.
- Avg high
- 85°F (29°C)
- Avg low
- 83°F (28°C)
- Rain
- 6.6 in (167 mm)
- Humidity
- 77%
- Cloud cover
- 62%
- Daylight
- ~12 h 08 min
- Comfort score
- 59/100 · Fair
What September feels like
Highs settle around 85°F (29°C), warm enough for short sleeves.
Even at night it stays warm, around 83°F (28°C).
With 77% average humidity, it feels muggy.
Rain is a real factor, with about 6.6 in (167 mm) across the month.
Plan around September
September is one of the lower-scoring months here; the best are November – April.
- Inside the wettest three-month stretch, July – September.
- Comfort slips from 62/100 in August to 59/100.
- Our Key West New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clothes85°F afternoons
- Sunscreen, sunglasses and a hatstrong sun this month
- Quick-dry fabrics77% average humidity
- Rain jacket and waterproof shoesfrequent rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Bahia Honda & the Lower Keys in September
Wet days call for a roof: these picks favor sit-down and indoor stops, plus a few for drier spells.
No Name Pub
A pizza and beer stop on a back road of Big Pine Key, its walls covered in signed dollar bills.
Why now A sit-down stop to wait out showers in a month with 6.6 in of rain.
Blue Hole
A freshwater pond in an old quarry in the National Key Deer Refuge, where small Key deer and alligators are often seen.
Old Seven Mile Bridge
A 2.2-mile walk or bike ride on the restored old bridge from Marathon out to Pigeon Key.
Old Bahia Honda Bridge
A section of Flagler's 1912 railroad bridge inside the park, with a walkway on top that looks over the channel.
Nearby in September
- Key West in September~33 mi · highs 85°F, 7.0 in rain · similar daytime temperatures, about as wet
- Everglades in September~49 mi · highs 85°F, 8.0 in rain · similar daytime temperatures, wetter
- Key Largo in September~59 mi · highs 85°F, 7.8 in rain · similar daytime temperatures, wetter
- Miami in September~101 mi · highs 85°F, 7.5 in rain · similar daytime temperatures, wetter
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Bahia Honda & the Lower Keys in September: quick answers
Is September a good time to visit Bahia Honda & the Lower Keys?
It's one of the tougher months here, scoring 59/100, held back mainly by rain. The best months are November – April. Expect highs of 85°F (29°C) and 6.6 in (167 mm) of rain.
How hot is Bahia Honda & the Lower Keys in September?
Average highs are 85°F (29°C) and average lows 83°F (28°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Bahia Honda & the Lower Keys in September?
Yes: about 6.6 in (167 mm) of rain falls across September on average, the wettest month of the year. The annual total is about 40.5 in (1028 mm).
What should I pack for Bahia Honda & the Lower Keys in September?
Bring light, breathable clothes (85°F afternoons), sunscreen, sunglasses and a hat (strong sun this month), quick-dry fabrics (77% average humidity), rain jacket and waterproof shoes (frequent rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Bahia Honda & the Lower Keys
Planning Bahia Honda & the Lower Keys in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.