Last updated: August 23, 2025
In September, the average temperature in Saint-Thomas, France is a pleasant 19°C (67°F). Expect a temperature range with a minimum of 7°C (45°F) and a maximum of 35°C (95°F). During this time, the region experiences 61 mm (2.4 in) of precipitation spread over 10 days, accompanied by an average humidity of 73%.
In September, in Saint-Thomas, the average temperature is 19°C (67°F). Maximum temperatures can reach 35°C (95°F), while the minimum can drop to as low as 7°C (45°F). This range makes Saint-Thomas a versatile destination, perfect for travelers seeking both warm days and cooler nights.
In Saint-Thomas in September, the precipitation amount is 61 mm (2.4 in) over a span of 10 days.
In Saint-Thomas in September humidity is 73%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapped around you, making travel slightly uncomfortable and sticky, but still manageable as long as you stay hydrated and take breaks in the shade.
In Saint-Thomas in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Saint-Thomas.
UV Risk Categories
Weather in Saint-Thomas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Thomas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 62 mm (2.5 inches) | 87% | low |
| February Weather | 9°C (48°F) | 66 mm (2.6 inches) | 83% | moderate |
| March Weather | 10°C (51°F) | 64 mm (2.5 inches) | 80% | high |
| April Weather | 13°C (55°F) | 69 mm (2.7 inches) | 77% | high |
| May Weather | 16°C (62°F) | 96 mm (3.8 inches) | 75% | very high |
| June Weather | 20°C (69°F) | 84 mm (3.3 inches) | 74% | very high |
| July Weather | 23°C (73°F) | 70 mm (2.7 inches) | 72% | very high |
| August Weather | 23°C (73°F) | 55 mm (2.2 inches) | 70% | very high |
| September Weather | 19°C (67°F) | 61 mm (2.4 inches) | 73% | high |
| October Weather | 15°C (59°F) | 64 mm (2.5 inches) | 82% | moderate |
| November Weather | 9°C (49°F) | 84 mm (3.3 inches) | 87% | moderate |
| December Weather | 8°C (46°F) | 118 mm (4.6 inches) | 88% | low |