Weather in Jacksonville in September 2025
- September is usually the wettest month of the year in Jacksonville;
Average weather
Average temperature in Jacksonville in September
The temperature in September is +30°C on average, with a range between a maximum of +35°C during the day and a minimum of +18°C at night.
The average maximum temperature goes down 6% by the end of the month, compared with the beginning of the month, from +29°C to +28°C.
Is Jacksonville warm or cold in September?
Jacksonville is typically warm in September.
Maximum temperatures go down compared to the previous month from +32°C to +30°C. The minimum temperature also goes down from +24°C to +23°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Jacksonville:
Climate in Jacksonville in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +32°C | +30°C | +27°C | ||||
| Min. temperature | ||||||
| +18°C | +11°C | +4°C | ||||
| Max. temperature | ||||||
| +39°C | +36°C | +34°C | ||||
| Rainfall | ||||||
| 134 mm | 117 mm | 61 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 81% | 81% | 78% | ||||
| Air pressure | ||||||
| 1015 HPa | 1014 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 1 | 3 | 8 | ||||
| Cloudy days | ||||||
| 3 | 6 | 10 | ||||
| Rainy days | ||||||
| 20 | 18 | 13 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +32°C in the day, the average maximum temperature lowers to +30°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 134 mm to 117 mm. Humidity levels don’t change as the month goes on, averaging around 81%. Winds are stronger in comparison to August, going up from 2 m/s to 3 m/s on average. The good news is there are likely to be more sunny days in September, from 1 to 3.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Jacksonville is gradually increasing during September, going from 5 m/s to 5 m/s over the course of the month.
Rain
How was the weather last September in Jacksonville?
Climate Change over Years
The climate in Jacksonville in September has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+24°C) and the highest in 2015 (+28°C). The driest year was 2006 with only 554 mm of rainfall, and the wettest year was 2020 with 1607 mm.
FAQ
Is September a good time to visit Jacksonville?
Can you sunbathe in Jacksonville in September?
Is Jacksonville rainy in September?
Is it sunny in Jacksonville in September?
Other cities in USA
Monthly weather in Jacksonville
Source of the data
For this page, we’ve looked at the typical weather in Jacksonville, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.