Warm
Average highs sit around 32°C, giving warm days by monthly-average standards.
September verdict
Cayman Islands in September
Weather score61Good
Good for holiday weather
Average highs sit around 32°C, giving warm days by monthly-average standards. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 185mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
32°C
Rain
185mm
Sun
5h
Sea
30°C
Weather score
61
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 185mm, so showers are a real planning factor.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Warm sea
Sea temperatures average 30°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Cayman Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September32°C average high
September is one of Cayman Islands' warmest months, with daytime heat above the yearly average.
Warmest monthsMay to October
This stretch sets the upper range for average daytime heat.
Rain
September185mm average rain
September is wetter than Cayman Islands' yearly average, so flexible plans matter more.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5 hours average sun
September is below Cayman Islands' yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsApril and July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September30°C average sea
September is one of Cayman Islands' warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September61 weather score
September scores below Cayman Islands' yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to April
These months have the strongest weather score in the monthly averages.
