Last updated: August 22, 2025
In September, the average temperature in Henndorf am Wallersee, Austria hovers around 14°C (58°F), with the potential to dip as low as 2°C (35°F) or soar to a balmy 29°C (84°F). Visitors should be prepared for 114 mm (4.5 in) of rain spread over approximately 13 days, creating a 74% average humidity that gives the air a notable stickiness.
In September in Henndorf am Wallersee, the average temperature is 14°C (58°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 2°C (35°F). This temperature variation makes Henndorf am Wallersee a great destination for travelers looking to experience a range of weather conditions during their visit.
In Henndorf am Wallersee in September, the total precipitation amount is 114 mm (4.5 in), distributed over the course of 13 days.
In Henndorf am Wallersee in September humidity is 74%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or indoor venues more often.
In Henndorf am Wallersee 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 Henndorf am Wallersee, you can refer to this Hourly UV Index in Henndorf am Wallersee.
UV Risk Categories
Weather in Henndorf am Wallersee varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Henndorf am Wallersee, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 104 mm (4.1 inches) | 91% | low |
| February Weather | 2°C (36°F) | 90 mm (3.5 inches) | 87% | moderate |
| March Weather | 5°C (41°F) | 94 mm (3.7 inches) | 82% | moderate |
| April Weather | 9°C (49°F) | 65 mm (2.6 inches) | 79% | high |
| May Weather | 13°C (56°F) | 153 mm (6.0 inches) | 74% | very high |
| June Weather | 18°C (65°F) | 134 mm (5.3 inches) | 75% | very high |
| July Weather | 19°C (66°F) | 147 mm (5.8 inches) | 74% | very high |
| August Weather | 19°C (66°F) | 151 mm (5.9 inches) | 68% | very high |
| September Weather | 14°C (58°F) | 114 mm (4.5 inches) | 74% | high |
| October Weather | 10°C (50°F) | 110 mm (4.3 inches) | 88% | moderate |
| November Weather | 4°C (40°F) | 72 mm (2.8 inches) | 90% | low |
| December Weather | 2°C (35°F) | 131 mm (5.2 inches) | 89% | low |