Last updated: August 23, 2025
In September, the average temperature in Achern, Germany is a pleasant 17°C (63°F), but you can expect temperatures to range from a cool 3°C (38°F) to a warm 33°C (91°F). During this month, the area sees an average precipitation of 48 mm (1.9 in) over 7 days, making for a moderate climate. With an average humidity of 85%, it's wise to stay prepared for the moist conditions!
In September in Achern, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 33°C (91°F), while minimums can drop as low as 3°C (38°F). It's a great time for travelers to enjoy a mix of warm and cool weather, making it ideal for both outdoor activities and exploring the local culture.
In Achern in September, the total precipitation amount is 48 mm (1.9 in) over a span of 7 days.
In Achern in September humidity is 85%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit stifling and encouraging frequent breaks in shaded areas or air-conditioned spaces for travelers.
In Achern 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 Achern, you can refer to this Hourly UV Index in Achern.
UV Risk Categories
Weather in Achern varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Achern, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 89 mm (3.5 inches) | 91% | low |
| February Weather | 5°C (41°F) | 79 mm (3.1 inches) | 89% | moderate |
| March Weather | 7°C (45°F) | 85 mm (3.3 inches) | 87% | moderate |
| April Weather | 11°C (52°F) | 36 mm (1.4 inches) | 83% | high |
| May Weather | 15°C (59°F) | 76 mm (3.0 inches) | 79% | very high |
| June Weather | 20°C (68°F) | 75 mm (2.9 inches) | 82% | very high |
| July Weather | 21°C (71°F) | 64 mm (2.5 inches) | 83% | very high |
| August Weather | 21°C (70°F) | 54 mm (2.1 inches) | 84% | very high |
| September Weather | 17°C (63°F) | 48 mm (1.9 inches) | 85% | high |
| October Weather | 12°C (54°F) | 80 mm (3.2 inches) | 88% | moderate |
| November Weather | 7°C (44°F) | 63 mm (2.5 inches) | 89% | low |
| December Weather | 5°C (40°F) | 124 mm (4.9 inches) | 91% | low |