The temperatures in Cayman Islands during September are extremely high, between 29°C and hot as 29°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Cayman Islands. 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 Cayman Islands in September 2025.
If you’re planning to visit Cayman Islands in the near future, we highly recommend that you review the 14 day weather forecast for Cayman Islands before you arrive.
Temperatures
29° / 29°
Rainy Days
8
Snowy Days
0
Dry Days
22
Rainfall
176
mm
Sun Hours
6.3
Hrs
