Last updated: August 23, 2025
In Illkirch-Graffenstaden, France, the average temperature in September is a comfortable 17°C (62°F). Expect temperatures to range from a chilly 3°C (37°F) to a warm 32°C (91°F). With an average precipitation of 47 mm (1.9 in) over 9 days, pack your umbrella! Furthermore, the average humidity is a noteworthy 85%, adding to the vibrant atmosphere of this beautiful location.
In September in Illkirch-Graffenstaden, the average temperature is 17°C (62°F). Maximums can reach 32°C (91°F), and minimums can be as low as 3°C (37°F). This diverse range of temperatures offers travelers a comfortable climate, perfect for exploring outdoor activities or enjoying cozy indoor settings.
In Illkirch-Graffenstaden in September, the precipitation amount is 47 mm (1.9 in) spread over a period of 9 days.
In Illkirch-Graffenstaden in September humidity is 85%. With an average temperature of 17°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making travel somewhat uncomfortable as you navigate the thick, moist air that clings to your skin and slows your pace.
In Illkirch-Graffenstaden 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 Illkirch-Graffenstaden, you can refer to this Hourly UV Index in Illkirch-Graffenstaden.
UV Risk Categories
Weather in Illkirch-Graffenstaden varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Illkirch-Graffenstaden, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 82 mm (3.2 inches) | 91% | low |
| February Weather | 5°C (41°F) | 74 mm (2.9 inches) | 89% | moderate |
| March Weather | 7°C (45°F) | 79 mm (3.1 inches) | 87% | moderate |
| April Weather | 11°C (52°F) | 43 mm (1.7 inches) | 83% | high |
| May Weather | 15°C (59°F) | 85 mm (3.3 inches) | 79% | very high |
| June Weather | 20°C (68°F) | 79 mm (3.1 inches) | 82% | very high |
| July Weather | 21°C (70°F) | 80 mm (3.2 inches) | 83% | very high |
| August Weather | 21°C (70°F) | 75 mm (2.9 inches) | 84% | very high |
| September Weather | 17°C (62°F) | 47 mm (1.9 inches) | 85% | high |
| October Weather | 12°C (54°F) | 76 mm (3.0 inches) | 88% | moderate |
| November Weather | 6°C (44°F) | 63 mm (2.5 inches) | 89% | low |
| December Weather | 4°C (40°F) | 110 mm (4.3 inches) | 91% | low |