Cayman Islands weather in September 2025

Expect 90°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Cayman Islands in September. Check more long-term weather averages for Cayman Islands in September before you book your next holiday to Cayman Islands in 2025/2026.

  • 90°F maximum daytime temperature in September in Cayman Islands (George Town)90
    90°F max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in September in Cayman Islands (George Town)16
    16 days with some rainfall
  • 77°F minimum night-time temperature in September in Cayman Islands (George Town)77
    77°F min night temperature
  • 12 hours of daylight per day in September in Cayman Islands (George Town)12
    12 hours of daylight per day
  • Very high heat & humidity in September in Cayman Islands (George Town)VH
    Very High heat & humidity
  • 8.2 inches monthly rainfall in September in Cayman Islands (George Town)8.2
    8.2 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Cayman Islands (George Town)11
    11 (Extreme) UV index
  • 86°F sea temperature in September in Cayman Islands (George Town)86
    86°F sea temperature

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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)

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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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