The weather in Marco Island in September is very hot. The average temperatures are between 26°C and 31°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Marco Island.
Marco Island should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Marco Island in September 2025.
If you’re planning to visit Marco Island in the near future, we highly recommend that you review the 14 day weather forecast for Marco Island before you arrive.
Temperatures
31° / 26°
Rainy Days
15
Snowy Days
0
Dry Days
15
Rainfall
228
mm
Sun Hours
11.6
Hrs
