Last updated: August 23, 2025
In La Chapelle-sur-Erdre, France, the average temperature in September hovers around 17°C (63°F), with a refreshing minimum of 5°C (41°F) and a warm maximum of 34°C (93°F). Be prepared for 45 mm (1.8 in) of precipitation spread over 8 days, and you'll likely experience a comfortable average humidity of 75%.
In September in La Chapelle-sur-Erdre, the average temperature is 17°C (63°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 5°C (41°F). It's a good time to pack layers and enjoy a mix of warm and cool weather for your travels.
In La Chapelle-sur-Erdre in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.
In La Chapelle-sur-Erdre in September, humidity is 75%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities a bit sticky and requiring frequent breaks to stay refreshed during your travels.
In La Chapelle-sur-Erdre in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in La Chapelle-sur-Erdre, you can refer to this Hourly UV Index in La Chapelle-sur-Erdre.
UV Risk Categories
Weather in La Chapelle-sur-Erdre varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Chapelle-sur-Erdre, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 50 mm (2.0 inches) | 88% | low |
| February Weather | 7°C (46°F) | 66 mm (2.6 inches) | 87% | moderate |
| March Weather | 9°C (49°F) | 71 mm (2.8 inches) | 84% | moderate |
| April Weather | 12°C (53°F) | 51 mm (2.0 inches) | 83% | high |
| May Weather | 15°C (59°F) | 64 mm (2.5 inches) | 81% | very high |
| June Weather | 18°C (65°F) | 84 mm (3.3 inches) | 75% | very high |
| July Weather | 20°C (69°F) | 36 mm (1.4 inches) | 65% | very high |
| August Weather | 19°C (67°F) | 42 mm (1.7 inches) | 67% | very high |
| September Weather | 17°C (63°F) | 45 mm (1.8 inches) | 75% | high |
| October Weather | 13°C (56°F) | 83 mm (3.3 inches) | 85% | moderate |
| November Weather | 9°C (48°F) | 79 mm (3.1 inches) | 88% | low |
| December Weather | 8°C (46°F) | 107 mm (4.2 inches) | 90% | low |