Last updated: March 2, 2024
The weather in Grotte di Castro, Italy, during September is characterized by an average temperature of 20°C (67°F). Highs can soar to 30°C (86°F), while lows may dip to 10°C (50°F). Typically, the humidity level in Grotte di Castro throughout September hovers around 66%.
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Humidity
In September, Grotte di Castro averages 89 mm (3.5 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 26 minutes of daylight, with the sun shining for approximately 11 hours 14 minutes each day. Additionally, there is a 52% probability of sunny days during this period.
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In September, the UV Index in Grotte di Castro 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 | 4 | 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 | ||||||||