Last updated: August 23, 2025
The average temperature in Heidenheim, Germany during September is a pleasant 15°C (58°F). Expect a minimum of 2°C (36°F) and a maximum of 28°C (84°F), providing a wide range for outdoor activities. During this month, precipitation totals around 53 mm (2.1 in), typically spread over 10 days, so be prepared for occasional showers. With an average humidity of 85%, the air will feel quite moist, enhancing the lush atmosphere of the season.
In September in Heidenheim, the average temperature is 15°C (58°F), with maximums reaching 28°C (84°F) and minimums dropping as low as 2°C (36°F). This variety in temperatures makes it an ideal time to enjoy both outdoor activities and cozy indoor experiences while traveling.
In Heidenheim in September, the precipitation amount is 53 mm (2.1 in) spread over a duration of 10 days.
In Heidenheim in September humidity is 85%. With an average temperature of 15°C (58°F), this humidity feels like an enveloping blanket, making travel feel sticky and heavy, often leading to a sense of discomfort that can drain your energy during outdoor explorations.
In Heidenheim 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 Heidenheim, you can refer to this Hourly UV Index in Heidenheim.
UV Risk Categories
Weather in Heidenheim varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Heidenheim, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 62 mm (2.4 inches) | 91% | low |
| February Weather | 2°C (37°F) | 59 mm (2.3 inches) | 89% | moderate |
| March Weather | 5°C (41°F) | 62 mm (2.4 inches) | 88% | moderate |
| April Weather | 9°C (49°F) | 38 mm (1.5 inches) | 84% | high |
| May Weather | 13°C (55°F) | 102 mm (4.0 inches) | 77% | very high |
| June Weather | 18°C (65°F) | 109 mm (4.3 inches) | 82% | very high |
| July Weather | 19°C (66°F) | 83 mm (3.3 inches) | 83% | very high |
| August Weather | 19°C (66°F) | 100 mm (3.9 inches) | 84% | very high |
| September Weather | 15°C (58°F) | 53 mm (2.1 inches) | 85% | high |
| October Weather | 10°C (50°F) | 60 mm (2.4 inches) | 88% | moderate |
| November Weather | 4°C (40°F) | 47 mm (1.9 inches) | 88% | low |
| December Weather | 2°C (36°F) | 96 mm (3.8 inches) | 91% | low |