George Town Temperature by Month

George Town, Grand Cayman, Cayman Islands has a consistently comfortable climate year-round, with daytime highs averaging 29°C (84°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

George Town enjoys a stable climate with temperatures staying pretty much the same throughout the year. Maximum daytime temperatures range from a comfortable 27°C (81°F) in January to a very warm 30°C (86°F) in August. Nights are consistently cool, with lows between 27°C (81°F) and 25°C (77°F).

The chart below illustrates the average maximum day and minimum night temperatures in George Town by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 249 hours of sunshine.

The chart below shows the average temperature throughout the year:

George Town's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In George Town, January is the coolest month, with average highs of 27°C (81°F) and humidity around 76%, considered high. In August, the warmest month, temperatures average 30°C (86°F) with 78% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in George Town this rarely lasts long on the ground.

For more on George Town's weather, including monthly rainfall, sunshine hours, and humidity, visit our George Town climate page.