Weather in Fort Myers in September 2025
- September is usually the wettest month of the year in Fort Myers;
Average weather
Average temperature in Fort Myers in September
The temperature in September is +33°C on average, with a range between a maximum of +35°C during the day and a minimum of +22°C at night.
The average maximum temperature goes down 23% by the end of the month, compared with the beginning of the month, from +35°C to +32°C.
Is Fort Myers warm or cold in September?
Fort Myers is typically hot in September.
Maximum temperatures go down compared to the previous month from +32°C to +31°C. The minimum temperature also goes down from +25°C to +24°C.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how September is compared to other months in Fort Myers:
Water temperature in Fort Myers in September
Water in Fort Myers in September is Very warm. It varies from +28°C to +30°C, with an average of +29°C. This is almost similar to the air temperature, which averages +31°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Fort Myers in September?
Climate in Fort Myers in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +32°C | +31°C | +29°C | ||||
| Min. temperature | ||||||
| +22°C | +19°C | +9°C | ||||
| Max. temperature | ||||||
| +36°C | +35°C | +34°C | ||||
| Rainfall | ||||||
| 278 mm | 236 mm | 100 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +30°C | +29°C | +28°C | ||||
| Humidity | ||||||
| 79% | 79% | 75% | ||||
| Air pressure | ||||||
| 1015 HPa | 1013 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 2 | 3 | 11 | ||||
| Cloudy days | ||||||
| 1 | 1 | 5 | ||||
| Rainy days | ||||||
| 10 | 12 | 12 | ||||
| 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 +31°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 278 mm to 236 mm. Humidity levels don’t change as the month goes on, averaging around 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 2 to 3.
But maybe it is worth considering traveling in October as the weather gets better.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Fort Myers is gradually increasing during September, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Fort Myers?
Climate Change over Years
The climate in Fort Myers in September has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+27°C) and the highest in 2023 (+30°C). The driest year was 1997 with only 1050 mm of rainfall, and the wettest year was 2021 with 2546 mm.
FAQ
Is September a good time to visit Fort Myers?
Can you sunbathe in Fort Myers in September?
Can you swim in Fort Myers in September?
Is Fort Myers rainy in September?
Is it sunny in Fort Myers in September?
Other cities in USA
Monthly weather in Fort Myers
Source of the data
For this page, we’ve looked at the typical weather in Fort Myers, 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.