Early autumn · Weather & things to do
Downtown Jacksonville & Southbank in September
Downtown Jacksonville & Southbank edges cooler than August, with highs of 86°F (30°C), lows of 70°F (21°C) and about 5.8 in (147 mm) of rain.
Our comfort score puts it mid-table at 57/100, 9th of 12.
- Avg high
- 86°F (30°C)
- Avg low
- 70°F (21°C)
- Rain
- 5.8 in (147 mm)
- Humidity
- 81%
- Cloud cover
- 59%
- Daylight
- ~12 h 10 min
- Comfort score
- 57/100 · Fair
What September feels like
Afternoons run hot at about 86°F (30°C), which leaves mornings and evenings as the time for walking.
After dark, temperatures fall to about 70°F (21°C).
Humidity averages 81%, so the air feels sticky and the heat feels stronger than the thermometer says.
Rain is a real factor, with about 5.8 in (147 mm) across the month.
Plan around September
September sits mid-table; the best months are February – April and November.
- Comfort improves from 46/100 in August to 57/100.
- Our Jacksonville 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 clothes86°F afternoons
- Sun hat and sunscreenmidday heat
- Refillable water bottleeasy to dehydrate in the heat
- Quick-dry fabrics81% 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 Downtown Jacksonville & Southbank in September
With 5.8 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
Florida Theatre
Restored 1927 Mediterranean Revival movie palace downtown, now a concert and comedy venue.
Why now An indoor-leaning stop for a month with 5.8 in of rain.
Intuition Ale Works
Local brewery on East Bay Street near the stadium, with a rooftop deck looking back at the skyline.
Why now A sit-down stop to wait out showers in a month with 5.8 in of rain.
Cowford Chophouse
Steakhouse in the restored 1902 Bostwick Building on Bay Street, with a rooftop bar over the river.
Why now Go early — afternoons average 86°F.
Taverna
Mediterranean and Italian restaurant on San Marco Square, with wood-fired dishes and a long wine list.
Why now Best first thing, before the 86°F afternoon heat.
Nearby in September
- Jacksonville Beach in September~16 mi · highs 82°F, 5.4 in rain · 2°C (4°F) cooler by day, about as wet
- Amelia Island in September~27 mi · highs 82°F, 5.4 in rain · 2°C (4°F) cooler by day, about as wet
- St. Augustine in September~36 mi · highs 84°F, 6.6 in rain · 1°C (3°F) cooler by day, wetter
- Winter Park in September~121 mi · highs 85°F, 6.9 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.
Downtown Jacksonville & Southbank in September: quick answers
Is September a good time to visit Downtown Jacksonville & Southbank?
It's middling, scoring 57/100. The best months are February – April and November, at up to 90. Expect highs of 86°F (30°C) and 5.8 in (147 mm) of rain.
How hot is Downtown Jacksonville & Southbank in September?
Average highs are 86°F (30°C) and average lows 70°F (21°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Downtown Jacksonville & Southbank in September?
Yes: about 5.8 in (147 mm) of rain falls across September on average, the 4th-wettest month of the year. The annual total is about 50.6 in (1286 mm).
What should I pack for Downtown Jacksonville & Southbank in September?
Bring light, breathable clothes (86°F afternoons), sun hat and sunscreen (midday heat), refillable water bottle (easy to dehydrate in the heat), quick-dry fabrics (81% average humidity) and rain jacket and waterproof shoes (frequent rain).
More on Downtown Jacksonville & Southbank
Planning Downtown Jacksonville & Southbank 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.