Weather in Cayman Islands for September 2025
In general, the average temperature in Cayman Islands at the beginning of September is 29.9 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.6 °C by the end of September.
Cayman Islands experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.
Is September a good time to visit Cayman Islands? check out the best time to travel to Cayman Islands page.
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Cayman Islands in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2  29° | 3 31° | 4  30° | 5 29° | 6 29° | 7 30° |
| 8  30° | 9  31° | 10 30° | 11 30° | 12  31° | 13  30° | 14  31° |
| 15 31° | 16 31° | 17 32° | 18 30° | 19 32° | 20 30° | 21 31° |
| 22 31° | 23 30° | 24 29° | 25 29° | 26  29° | 27 30° | 28 30° |
| 29 29° | 30 31° |
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Temperatures trend during September in Cayman Islands
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 31° /28° | 0.8 mm | 7 | |
| 2 Sept. | Overcast | 29° /28° | 2.7 mm | 6 | |
| 3 Sept. | Patchy rain possible | 31° /28° | 5.3 mm | 7 | |
| 4 Sept. | Thundery outbreaks possible | 30° /28° | 2.5 mm | 7 | |
| 5 Sept. | Patchy rain possible | 29° /27° | 3 mm | 6 | |
| 6 Sept. | Thundery outbreaks possible | 29° /28° | 3.4 mm | 6 | |
| 7 Sept. | Patchy rain possible | 30° /28° | 0.4 mm | 7 | |
| 8 Sept. | Patchy light rain with thunder | 30° /28° | 0.9 mm | 7 | |
| 9 Sept. | Moderate rain at times | 31° /28° | 0.7 mm | 7 | |
| 10 Sept. | Thundery outbreaks possible | 30° /28° | 0 mm | 7 | |
| 11 Sept. | Moderate rain at times | 30° /29° | 2.2 mm | 7 | |
| 12 Sept. | Cloudy | 31° /28° | 0 mm | 7 | |
| 13 Sept. | Moderate or heavy rain with thunder | 30° /28° | 5.9 mm | 7 | |
| 14 Sept. | Partly cloudy | 31° /29° | 2.4 mm | 8 | |
| 15 Sept. | Cloudy | 31° /28° | 0.1 mm | 7 | |
| 16 Sept. | Partly cloudy | 31° /28° | 1.6 mm | 8 | |
| 17 Sept. | Patchy rain possible | 32° /28° | 4.3 mm | 7 | |
| 18 Sept. | Cloudy | 30° /28° | 0.6 mm | 7 | |
| 19 Sept. | Patchy light rain with thunder | 32° /29° | 17 mm | 7 | |
| 20 Sept. | Light rain shower | 30° /28° | 11.5 mm | 7 | |
| 21 Sept. | Partly cloudy | 31° /29° | 1.2 mm | 7 | |
| 22 Sept. | Patchy rain possible | 31° /28° | 1.3 mm | 7 | |
| 23 Sept. | Partly cloudy | 30° /28° | 4.9 mm | 7 | |
| 24 Sept. | Thundery outbreaks possible | 29° /27° | 55.3 mm | 6 | |
| 25 Sept. | Moderate or heavy rain shower | 29° /28° | 87.3 mm | 7 | |
| 26 Sept. | Torrential rain shower | 29° /26° | 36.8 mm | 7 | |
| 27 Sept. | Thundery outbreaks possible | 30° /28° | 8.7 mm | 7 | |
| 28 Sept. | Moderate or heavy rain shower | 30° /28° | 1.5 mm | 7 | |
| 29 Sept. | Patchy rain possible | 29° /28° | 4.5 mm | 6 | |
| 30 Sept. | Patchy rain possible | 31° /28° | 3.5 mm | 8 | |
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Guide for Cayman Islands in September
In the Cayman Islands, September marks the transition from the peak of the summer season to the beginning of the fall season. At the beginning of the month, the weather in the Cayman Islands is typically warm and humid, with average temperatures ranging from 28° to 31°.
The sea temperatures are also quite warm, making it an ideal time for water activities such as snorkeling and diving. However, there is a higher chance of experiencing brief showers or thunderstorms during this time, as it is the tail end of the wet season.
By the end of September, the weather in the Cayman Islands begins to show signs of the approaching fall season. The temperatures start to gradually decrease, with average highs around 30° and lows around 26°.
The humidity also begins to lessen, providing a more comfortable environment for outdoor activities. The sea conditions remain favorable for water sports and beach outings, with water temperatures remaining warm and inviting.
Overall, September in the Cayman Islands offers a mix of warm temperatures, occasional showers, and decreasing humidity as the month progresses, making it a great time to enjoy the island's natural beauty and outdoor attractions.
Cayman Islands in September - FAQ
What to pack to Cayman Islands in September?
As you prepare for your trip to Cayman Islands in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cayman Islands, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
September rainfall patterns in Cayman Islands
UV exposure in Cayman Islands during September
Quick links
Where is Cayman Islands?Get accurate weather forecasts for Cayman Islands, located at latitude 19.287 and longitude -81.374. Stay updated with localized weather information tailored for Cayman Islands.