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Cayman Islands weather in September 2025
Expect daytime maximum temperatures of 90°F in Cayman Islands in September and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 8.2 inches of rainfall in the month.
- 90°F max day temperature
90 - 8 hours of sunshine per day
- 16 days with some rainfall
16 - 77°F min night temperature
77 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 8.2 inches of monthly rainfall
8.2 - 11 (Extreme) UV index
11 - 86°F sea temperature
86
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The September weather guide for Cayman Islands, represented by George Town, (George Town) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
How hot is it in the Cayman Islands in September?
Daytime temperatures usually reach 90°F in George Town, Cayman Islands in September with very high heat and humidity, falling to 77°F at night.
How sunny is it in the Cayman Islands in September?
There are normally 8 hours of bright sunshine each day in George Town, Cayman Islands in September - that's 61% of daylight hours.
How warm is the sea around the Cayman Islands in September?
The average sea temperature around George Town, Cayman Islands in September is 86°F.
Does it rain in the Cayman Islands in September?
There are usually 16 days with some rain in George Town, Cayman Islands in September and the average monthly rainfall is 8.2 inches.
What is the chance of a hurricane in the Cayman Islands in September?
On average less than 1 day in September in George Town, Cayman Islands is likely to be affected by the passage of one or more tropical storms.
Cayman Islands September sunrise & sunset times
Browse the sunrise and sunset times for Cayman Islands in September 2025. Select a month to view Cayman Islands sunrise and sunset times for the next 12 months. The Cayman Islands sunrise and sunset times shown below are for George Town.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:10 | 18:40 |
| Monday, 15th September 2025 | 06:13 | 18:28 |
| Tuesday, 30th September 2025 | 06:16 | 18:14 |
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