Jacksonville in September
In September, Jacksonville averages 29°C (85°F) during the day and 23°C (73°F) at night, with frequent rain — about 23 days of the month see precipitation (179 mm total).
Off-peakConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
It's peak hurricane season in Jacksonville during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How September compares to the rest of the year in Jacksonville
September is in the middle of the year for warmth in Jacksonville (4th of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 4°C above the annual average (26°C). September runs 2°C cooler than August (31°C) and cools 3°C in October (26°C).
September sunrise & sunset in Jacksonville
Times shown for Jacksonville local time (America/New_York), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Jacksonville — September
Golden-hour and blue-hour windows for the 15th of September, in Jacksonville's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Jacksonville in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Off-peak) and Jacksonville's popularity.
Crowds & pricing — September in Jacksonville
This is off-peak for Jacksonville — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: peak hazard season (1 active)
Sun & mosquito risk — September in Jacksonville
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Jacksonville in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 18°C / 64°F | 9°C / 47°F | 63 mm | 12 | — |
| February | 21°C / 69°F | 11°C / 53°F | 77 mm | 13 | — |
| March | 23°C / 74°F | 14°C / 56°F | 66 mm | 12 | — |
| April | 26°C / 79°F | 17°C / 62°F | 79 mm | 14 | — |
| May | 29°C / 84°F | 20°C / 68°F | 83 mm | 17 | — |
| June | 31°C / 88°F | 23°C / 74°F | 159 mm | 25 | — |
| July | 32°C / 89°F | 24°C / 76°F | 165 mm | 28 | — |
| August | 31°C / 88°F | 25°C / 76°F | 177 mm | 28 | — |
| September | 29°C / 85°F | 23°C / 73°F | 179 mm | 23 | — |
| October | 26°C / 79°F | 19°C / 66°F | 74 mm | 16 | — |
| November | 22°C / 71°F | 14°C / 57°F | 69 mm | 14 | — |
| December | 20°C / 68°F | 12°C / 53°F | 69 mm | 13 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Jacksonville in September →
Frequently asked questions
How hot is Jacksonville in September?
In September, Jacksonville averages a high of 29°C (85°F) and a low of 23°C (73°F) — generally warm.
Does it rain a lot in Jacksonville in September?
September is quite rainy in Jacksonville, with about 23 rainy days on average.
Is September a good time to visit Jacksonville?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Jacksonville in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Jacksonville for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.