Climate averages 1991–2020
Fort Myers weather
in September.
A hot, wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Fort Myers: daytime highs average 30.4°C and nights cool to about 23.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 156 mm of rain on roughly 20 days, which makes September a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average September day.
The nearest other city in this atlas is Cape Coral (13 km away). In September its highs average 30.2°C, about as warm as Fort Myers, with 141 mm of rain.
Among the 498 cities listed in the United States, Fort Myers ranks joint 97th of 498 for the warmest September highs and joint 481st of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Fort Myers is 3.5°C warmer than that mean.
From September to October, average highs fall by 1.7°C to 28.7°C, and monthly rainfall falls from 156 mm to 74 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Fort Myers climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.9°C13.4°C | 13.4°C | 45 | 5.3 | 10.711 h |
| February | 24.3°C14.5°C | 14.5°C | 35 | 4.7 | 11.211 h |
| March | 26.3°C16.1°C | 16.1°C | 43 | 4.9 | 12.012 h |
| April | 28.7°C18.6°C | 18.6°C | 50 | 6.4 | 12.813 h |
| May | 30.9°C21.2°C | 21.2°C | 74 | 9.5 | 13.413 h |
| June | 31.1°C23.7°C | 23.7°C | 176 | 20.8 | 13.814 h |
| July | 31.2°C24.3°C | 24.3°C | 165 | 23.1 | 13.614 h |
| August | 31.2°C24.4°C | 24.4°C | 164 | 24.0 | 13.113 h |
| September, selected | 30.4°C23.8°C | 23.8°C | 156 | 19.7 | 12.312 h |
| October | 28.7°C21.2°C | 21.2°C | 74 | 8.9 | 11.612 h |
| November | 26.2°C17.5°C | 17.5°C | 33 | 4.2 | 10.911 h |
| December | 24.1°C15.2°C | 15.2°C | 33 | 4.3 | 10.511 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Cape Coral in SeptemberUnited States · 13 kmHigh 30.2°C · Low 24.1°C · 141 mm rain
- Lehigh Acres in SeptemberUnited States · 21 kmHigh 30.7°C · Low 23.1°C · 162 mm rain
- St. Petersburg in SeptemberUnited States · 152 kmHigh 29.2°C · Low 24.7°C · 139 mm rain
- Brandon in SeptemberUnited States · 153 kmHigh 30.3°C · Low 23.3°C · 120 mm rain
- Lakeland in SeptemberUnited States · 158 kmHigh 30.0°C · Low 22.9°C · 130 mm rain
- Tampa in SeptemberUnited States · 160 kmHigh 30.0°C · Low 23.4°C · 137 mm rain
- Coral Springs in SeptemberUnited States · 161 kmHigh 30.1°C · Low 24.1°C · 176 mm rain
- Port Saint Lucie in SeptemberUnited States · 166 kmHigh 29.6°C · Low 24.3°C · 139 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Fort Myers) is explained once on the Fort Myers year overview and on the Sources, method and limits page.