September weather forecast and climate
Fort Myers, FL

Dusk over the pier bridge in Fort Myers, Florida, with cloudy skies and calm waters below
Dusk over the pier bridge in Fort Myers, Florida, with cloudy skies and calm waters below

What is the temperature in September in Fort Myers?

The average high-temperature, in September, in Fort Myers, Florida, is 90.5°F (32.5°C), while the average low-temperature is 74.3°F (23.5°C).

How many days does it rain in September in Fort Myers?

In Fort Myers, in September, it is raining for 15.4 days, with typically 8" (202mm) of accumulated precipitation.
Average temperature in September - Fort Myers, FL
  • Average high temperature in September: 90.5°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (74.7°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is August (74.9°F).
The coldest month (with the lowest average low temperature) is January (53.7°F).

Average rainfall in September - Fort Myers, FL
  • Average rainfall in September: 8"

The wettest month (with the highest rainfall) is June (9.3").
The driest month (with the lowest rainfall) is April (1.4").

Average rainfall days in September - Fort Myers, FL
  • Average rainfall days in September: 15.4 days

The month with the highest number of rainy days is August (17.9 days).
The month with the lowest number of rainy days is April (4.2 days).

Average sea temperature in September - Fort Myers, FL
  • Average sea temperature in September: 84°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (70°F).

Average daylight in September / Average sunshine in September - Fort Myers, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.8h).
The month with shortest days is December (Average daylight: 10.5h).

  • Average sunshine in September: 8h

Months with most sunshine are April, May and June (Average sunshine: 10h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in September - Fort Myers, FL
  • Average UV index in September: 10

Months with the highest UV index are April, May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 5).

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