Last updated: March 2, 2024
The weather in Saint-Leonard, Switzerland, during September is characterized by an average temperature of 9°C (49°F). Highs can soar to 20°C (69°F), while lows may dip to -2°C (29°F). Typically, the humidity level in Saint-Leonard throughout September hovers around 81%.
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Average temperature
Maximum temperature
Humidity
In September, Saint-Leonard averages 90 mm (3.6 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 12 hours 29 minutes of daylight, with the sun shining for approximately 10 hours 46 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Saint-Leonard reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, 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 | 7 | 7 | 6 | 4 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||