Last updated: March 2, 2024
The weather in Grassau, Germany, during September is characterized by an average temperature of 13°C (56°F). Highs can soar to 25°C (78°F), while lows may dip to 2°C (36°F). Typically, the humidity level in Grassau throughout September hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Grassau averages 146 mm (5.7 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 31 minutes of daylight, with the sun shining for approximately 9 hours 55 minutes each day. Additionally, there is a 49% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Grassau reaches a maximum of 6, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 25 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 2 | 3 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||