Last updated: August 23, 2025
In September, the average temperature in Castel San Giovanni, Italy hovers around 19°C (67°F), making it a pleasant destination for visitors. Temperatures can vary significantly, with a minimum of 6°C (43°F) and a maximum of 31°C (88°F). Expect some rain, as the region receives about 103 mm (4.1 in) of precipitation over 11 days. With an average humidity of 74%, it's advisable to dress comfortably during your stay!
In September in Castel San Giovanni, the average temperature is 19°C (67°F), with maximums reaching 31°C (88°F) and minimums dropping as low as 6°C (43°F). Overall, it's a great time to visit Castel San Giovanni if you enjoy mild weather with warm days and cooler nights.
In Castel San Giovanni in September, the precipitation amount is 103 mm (4.1 in) spread over 11 days.
In Castel San Giovanni in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.
In Castel San Giovanni 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 Castel San Giovanni, you can refer to this Hourly UV Index in Castel San Giovanni.
UV Risk Categories
Weather in Castel San Giovanni varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Castel San Giovanni, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 34 mm (1.3 inches) | 88% | low |
| February Weather | 6°C (43°F) | 54 mm (2.1 inches) | 81% | moderate |
| March Weather | 9°C (48°F) | 58 mm (2.3 inches) | 76% | moderate |
| April Weather | 13°C (55°F) | 72 mm (2.8 inches) | 77% | high |
| May Weather | 17°C (63°F) | 118 mm (4.7 inches) | 74% | very high |
| June Weather | 23°C (73°F) | 71 mm (2.8 inches) | 71% | very high |
| July Weather | 24°C (76°F) | 86 mm (3.4 inches) | 67% | very high |
| August Weather | 24°C (76°F) | 77 mm (3.0 inches) | 64% | very high |
| September Weather | 19°C (67°F) | 103 mm (4.1 inches) | 74% | high |
| October Weather | 14°C (58°F) | 84 mm (3.3 inches) | 87% | moderate |
| November Weather | 9°C (48°F) | 134 mm (5.3 inches) | 88% | moderate |
| December Weather | 4°C (39°F) | 97 mm (3.8 inches) | 85% | low |