Last updated: August 23, 2025
In September, the average temperature in Saint-Germain-le-Chatelet, France hovers around 16°C (61°F), offering a comfortable climate for exploration. However, temperatures can swing from a brisk 4°C (39°F) to a warm 31°C (88°F). Rainfall is moderate, with an average precipitation of 57 mm (2.2 in) spread over 9 days, and the air carries a notable average humidity of 81%. Whether you prefer cool breezes or sunny days, Saint-Germain-le-Chatelet has a little something for everyone!
In September in Saint-Germain-le-Chatelet, the average temperature is 16°C (61°F). The maximum can reach 31°C (88°F) and the minimum can be as low as 4°C (39°F). This variation in temperature makes it ideal for travelers to pack layers for both warm and cooler days.
In Saint-Germain-le-Chatelet in September, the total precipitation amount is 57 mm (2.2 in) over the course of 9 days.
In Saint-Germain-le-Chatelet in September, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.
In Saint-Germain-le-Chatelet 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 Saint-Germain-le-Chatelet, you can refer to this Hourly UV Index in Saint-Germain-le-Chatelet.
UV Risk Categories
Weather in Saint-Germain-le-Chatelet varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Germain-le-Chatelet, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 106 mm (4.2 inches) | 91% | low |
| February Weather | 4°C (39°F) | 89 mm (3.5 inches) | 89% | moderate |
| March Weather | 6°C (44°F) | 99 mm (3.9 inches) | 87% | moderate |
| April Weather | 10°C (50°F) | 51 mm (2.0 inches) | 84% | high |
| May Weather | 14°C (57°F) | 117 mm (4.6 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 91 mm (3.6 inches) | 82% | very high |
| July Weather | 20°C (69°F) | 75 mm (2.9 inches) | 82% | very high |
| August Weather | 20°C (68°F) | 66 mm (2.6 inches) | 77% | very high |
| September Weather | 16°C (61°F) | 57 mm (2.2 inches) | 81% | high |
| October Weather | 11°C (52°F) | 87 mm (3.4 inches) | 89% | moderate |
| November Weather | 5°C (42°F) | 78 mm (3.1 inches) | 89% | low |
| December Weather | 3°C (38°F) | 144 mm (5.7 inches) | 91% | low |