Last updated: March 2, 2024
The weather in Aosta, Italy, during September is characterized by an average temperature of 8°C (47°F). Highs can soar to 18°C (65°F), while lows may dip to -2°C (28°F). Typically, the humidity level in Aosta throughout September hovers around 73%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Aosta averages 64 mm (2.5 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 57 minutes each day. Additionally, there is a 27% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Aosta reaches a maximum of 8, 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 | 5 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||