Last updated: August 23, 2025
In Valle San Bartolomeo, Italy, the average temperature in September is a pleasant 21°C (71°F). Expect temperatures to range from a cool 8°C (47°F) to a warm 33°C (92°F). During this time, precipitation averages 53 mm (2.1 in) spread over 8 days, and the average humidity hovers around 74%. Enjoy the vibrant climate this month!
In September in Valle San Bartolomeo, the average temperature is 21°C (71°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop to as low as 8°C (47°F). This range makes it an ideal time for travelers looking to enjoy mild weather and various outdoor activities.
In Valle San Bartolomeo in September, the total precipitation amount is 53 mm (2.1 in) over the course of 8 days.
In Valle San Bartolomeo in September, humidity is 74%. With an average temperature of 21°C (71°F), this humidity feels like traveling through a warm, damp blanket, making outdoor excursions feel sticky and a bit stifling, often prompting the need for frequent breaks to stay refreshed.
In Valle San Bartolomeo in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Valle San Bartolomeo, you can refer to this Hourly UV Index in Valle San Bartolomeo.
UV Risk Categories
Weather in Valle San Bartolomeo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Valle San Bartolomeo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 36 mm (1.4 inches) | 88% | low |
| February Weather | 7°C (45°F) | 47 mm (1.9 inches) | 81% | moderate |
| March Weather | 10°C (50°F) | 53 mm (2.1 inches) | 76% | moderate |
| April Weather | 14°C (58°F) | 62 mm (2.4 inches) | 77% | high |
| May Weather | 18°C (65°F) | 87 mm (3.4 inches) | 74% | very high |
| June Weather | 24°C (76°F) | 46 mm (1.8 inches) | 71% | very high |
| July Weather | 26°C (79°F) | 50 mm (2.0 inches) | 67% | very high |
| August Weather | 26°C (80°F) | 31 mm (1.2 inches) | 64% | very high |
| September Weather | 21°C (71°F) | 53 mm (2.1 inches) | 74% | high |
| October Weather | 16°C (60°F) | 93 mm (3.7 inches) | 87% | moderate |
| November Weather | 10°C (50°F) | 142 mm (5.6 inches) | 88% | moderate |
| December Weather | 4°C (40°F) | 78 mm (3.1 inches) | 85% | low |