The weather in Port St. Lucie in September is very hot. The average temperatures are between 26°C and 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Port St. Lucie. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Port St. Lucie in September 2025.
If you’re planning to visit Port St. Lucie in the near future, we highly recommend that you review the 14 day weather forecast for Port St. Lucie before you arrive.
Temperatures
30° / 26°
Rainy Days
11
Snowy Days
0
Dry Days
19
Rainfall
177
mm
Sun Hours
11.5
Hrs
