Early autumn · Weather & things to do
Downtown St. Petersburg in September
Downtown St. Petersburg edges cooler than August, with highs of 85°F (29°C), lows of 75°F (24°C) and about 7.3 in (185 mm) of rain.
Our comfort score puts it mid-table at 54/100, 9th of 12.
- Avg high
- 85°F (29°C)
- Avg low
- 75°F (24°C)
- Rain
- 7.3 in (185 mm)
- Humidity
- 83%
- Cloud cover
- 59%
- Daylight
- ~12 h 09 min
- Comfort score
- 54/100 · Fair
What September feels like
Highs settle around 85°F (29°C), warm enough for short sleeves.
Nights stay warm too, with lows averaging 75°F (24°C).
With 83% average humidity, it feels muggy.
Expect regular rain: about 7.3 in (185 mm) falls in the month.
Plan around September
September sits mid-table; the best months are November – April.
- Comfort improves from 41/100 in August to 54/100.
- Our Tampa 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 clotheshighs average 85°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Quick-dry fabrics83% average humidity
- Rain jacket and waterproof shoes7.3 in of rain on average
- Comfortable walking shoesmost picks involve some walking
What to do in Downtown St. Petersburg in September
With 7.3 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
Salvador Dali Museum
The largest Dali collection outside Europe, in a concrete box wrapped by a glass bubble on the bay.
Why now An indoor-leaning stop for a month with 7.3 in of rain.
Ted Peters Famous Smoked Fish
Roadside smokehouse since 1951 serving mullet and mackerel smoked over red oak, with smoked-fish spread.
Why now A sit-down stop to wait out showers in a month with 7.3 in of rain.
St. Pete Pier
Quarter-mile pier into Tampa Bay with parks, restaurants, a splash pad and a rooftop deck at its head.
Fort De Soto Park
County park on five keys at the mouth of Tampa Bay, with white-sand beaches, a 1898 fort and fishing piers.
Nearby in September
- Downtown Tampa & the Riverwalk in September~16 mi · highs 85°F, 7.3 in rain · similar daytime temperatures, about as wet
- Walt Disney World in September~78 mi · highs 85°F, 6.2 in rain · similar daytime temperatures, drier
- Winter Park in September~96 mi · highs 85°F, 6.9 in rain · similar daytime temperatures, about as wet
- St. Augustine in September~167 mi · highs 84°F, 6.6 in rain · similar daytime temperatures, drier
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.
Downtown St. Petersburg in September: quick answers
Is September a good time to visit Downtown St. Petersburg?
It's middling, scoring 54/100. The best months are November – April, at up to 91. Expect highs of 85°F (29°C) and 7.3 in (185 mm) of rain.
How hot is Downtown St. Petersburg in September?
Average highs are 85°F (29°C) and average lows 75°F (24°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Downtown St. Petersburg in September?
Yes: about 7.3 in (185 mm) of rain falls across September on average, the 4th-wettest month of the year. The annual total is about 56.7 in (1441 mm).
What should I pack for Downtown St. Petersburg in September?
Bring light, breathable clothes (highs average 85°F), sunscreen, sunglasses and a hat (high UV on clear days), quick-dry fabrics (83% average humidity), rain jacket and waterproof shoes (7.3 in of rain on average) and comfortable walking shoes (most picks involve some walking).
More on Downtown St. Petersburg
Planning Downtown St. Petersburg in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.