September
Weather in Castries for September 2025
Your guide to Castries weather in September - trends and predictions
In general, the average temperature in Castries at the beginning of September is 30 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 30.1 °C by the end of September.
Castries experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.
Is September a good time to visit Castries? check out the best time to travel to Castries page.
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8
Dry days
22
Rainy days
0
Snow days
30°/27°
Temperatures
19 km/h
Avg max wind
74 %
Avg humidity
Castries in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2  30° | 3 30° | 4 30° | 5 30° | 6 30° | 7 30° |
| 8 30° | 9 31° | 10 30° | 11 31° | 12  30° | 13 30° | 14 31° |
| 15 30° | 16 30° | 17 30° | 18  31° | 19 31° | 20 31° | 21 31° |
| 22 31° | 23 30° | 24  30° | 25  30° | 26 30° | 27 30° | 28 30° |
| 29 31° | 30 30° |
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Temperatures trend during September in Castries
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 30° /27° | 4.6 mm | 7 | |
| 2 Sept. | Patchy light rain with thunder | 30° /26° | 10.5 mm | 7 | |
| 3 Sept. | Light rain shower | 30° /26° | 3 mm | 7 | |
| 4 Sept. | Patchy rain possible | 30° /27° | 2.5 mm | 7 | |
| 5 Sept. | Patchy rain possible | 30° /27° | 1.1 mm | 7 | |
| 6 Sept. | Patchy rain possible | 30° /27° | 0.7 mm | 7 | |
| 7 Sept. | Patchy rain possible | 30° /27° | 1.4 mm | 7 | |
| 8 Sept. | Light rain shower | 30° /26° | 1.2 mm | 7 | |
| 9 Sept. | Patchy rain possible | 31° /26° | 2.2 mm | 7 | |
| 10 Sept. | Patchy rain possible | 30° /27° | 13 mm | 7 | |
| 11 Sept. | Patchy rain possible | 31° /27° | 5.2 mm | 7 | |
| 12 Sept. | Partly cloudy | 30° /27° | 2.3 mm | 8 | |
| 13 Sept. | Partly cloudy | 30° /27° | 3.5 mm | 8 | |
| 14 Sept. | Partly cloudy | 31° /27° | 3.1 mm | 8 | |
| 15 Sept. | Partly cloudy | 30° /27° | 1.2 mm | 8 | |
| 16 Sept. | Patchy rain possible | 30° /27° | 1.6 mm | 7 | |
| 17 Sept. | Patchy rain possible | 30° /27° | 1.8 mm | 7 | |
| 18 Sept. | Sunny | 31° /26° | 0.8 mm | 8 | |
| 19 Sept. | Patchy rain possible | 31° /27° | 2.6 mm | 7 | |
| 20 Sept. | Patchy light rain with thunder | 31° /27° | 1.3 mm | 7 | |
| 21 Sept. | Patchy light rain with thunder | 31° /28° | 1.1 mm | 8 | |
| 22 Sept. | Patchy rain possible | 31° /27° | 1.5 mm | 7 | |
| 23 Sept. | Patchy rain possible | 30° /27° | 3.8 mm | 7 | |
| 24 Sept. | Moderate or heavy rain shower | 30° /27° | 7.3 mm | 7 | |
| 25 Sept. | Patchy light rain | 30° /28° | 2.6 mm | 7 | |
| 26 Sept. | Patchy rain possible | 30° /27° | 11 mm | 7 | |
| 27 Sept. | Light rain shower | 30° /27° | 5.4 mm | 7 | |
| 28 Sept. | Partly cloudy | 30° /26° | 0.9 mm | 8 | |
| 29 Sept. | Patchy rain possible | 31° /27° | 0.5 mm | 7 | |
| 30 Sept. | Patchy rain possible | 30° /27° | 1.7 mm | 7 | |
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Important Notice
Our weather forecast for Castries in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Castries forecast closer to your planned date for the most up-to-date weather information.
Castries in September - FAQ
What are the expected maximum and minimum temperatures in Castries during September?
During September, expect a variety of temperatures with highs around 30° and lows near 27°, suitable for diverse activities and preferences.
How much rainfall should be expected in Castries during September?
Moderate rainfall is anticipated in Castries during September, with a total of 75.8 mm spread over approximately 22 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Castries during September?
The average wind speed in Castries during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Castries in September?
As you prepare for your trip to Castries 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 Castries, 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 Castries
Explore the daily rainfall trends and prepare for Castriess September weather 💧
UV exposure in Castries during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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