Georgetown Weather in September
During September, Georgetown experiences very high daytime temperatures of 30°C (86°F) and cooler nights around 27°C (81°F). Expect quite a bit of rainfall. Around 152 mm (6 in) is typical.
Rainfall in Georgetown in September
On average, there are about 16 days with rain during this month, averaging 152 mm (6 in). This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Georgetown in September
Temperatures in Georgetown in September top out at 30°C (86°F) and drop to 27°C (81°F) overnight. For most visitors, the main thing to prepare for is the heat during the day. Nights are warm at 27°C (81°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Georgetown in September
There are approximately 240 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in September
At 30°C (86°F), the water feels bath-warm. Fine for swimming, but those looking for a cooling swim may be a bit disappointed.If you prefer dry days with pleasant temperatures, January, February, March, April and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cayman Islands, check out our Georgetown's climate page.
Georgetown Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Water Temperature
30°C (86°F)
Chance of Rain
53%
Precipitation
152 mm (6 in)
Rainy days
16 days
Humidity
79%
Sunshine
240 hours
Percentage Sunshine
Daily Historical Temperatures
45-year average (1976-2025)
Based on our historical records, temperatures in Georgetown typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
45-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Georgetown in September
Browse day-by-day weather records for Georgetown spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Georgetown historical weather extremes in September
The extremes listed below come from historical weather data collected in Georgetown from 2005 through 2025.
- Georgetown recorded its highest September temperature of 39°C (102°F) on September 17, 2014.
- On September 28, 2010, Georgetown saw its coldest September day with temperatures maxing out at 28°C (82°F).
- The coldest night in September in Georgetown was on September 21, 2012, with a minimum of 23°C (73°F).
Best Places in Cayman Islands in September
Find out more about the weather in Cayman Islands and which places have the best travel conditions in this month. See all of Cayman Islands in September →
perfect weather
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What to Wear in Georgetown in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! The water temperature sits at about 30°C (86°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Georgetown in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cayman Islands, check out our Georgetown's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Georgetown climate overview or explore weather in Cayman Islands.
