Last updated: March 2, 2024
The weather in Promontogno, Switzerland, during September is characterized by an average temperature of 12°C (53°F). Highs can soar to 20°C (69°F), while lows may dip to 1°C (34°F). Typically, the humidity level in Promontogno throughout September hovers around 83%.
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Average temperature
Maximum temperature
Humidity
In September, Promontogno averages 116 mm (4.6 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 29 minutes of daylight, with the sun shining for approximately 10 hours 18 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Promontogno reaches a maximum of 7, 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 | 7 | 7 | 7 | 6 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||