Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
December verdict
Grand Cayman, Cayman Islands in December
Weather score74Very good
Very good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 7.1h per day, enough for a balanced month. Rainfall averages 57mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
29°C
Rain
57mm
Sun
7.1h
Sea
28°C
Weather score
74
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 57mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.1h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Grand Cayman, Cayman Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December29°C average high
December is on the cooler side of Grand Cayman's year, useful if you prefer less intense daytime heat.
Warmest monthsMay to October
This stretch sets the upper range for average daytime heat.
Rain
December57mm average rain
December sits on the drier side of Grand Cayman's year, which helps with sightseeing and transfers.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December7.1 hours average sun
December is one of Grand Cayman's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMarch to April and July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December28°C average sea
December is below Grand Cayman's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJune to October
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
December74 weather score
December scores above Grand Cayman's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJanuary to April and December
These months have the strongest weather score in the monthly averages.
