Last updated: August 23, 2025
In September, the average temperature in Castel San Niccolo, Italy is a mild 17°C (64°F), with lows dipping to 5°C (41°F) and highs reaching up to 29°C (84°F). Expect some rain, as precipitation averages around 96 mm (3.8 in) spread over 12 days. With an average humidity of 66%, it’s a month that balances warmth and occasional showers, perfect for enjoying the vibrant local scenery!
In September in Castel San Niccolo, the average temperature is 17°C (64°F). The maximum can reach 29°C (84°F), while the minimum can be as low as 5°C (41°F). This weather is ideal for travelers looking to enjoy pleasant days with a comfortable range for both outdoor activities and cooler evenings.
In Castel San Niccolo in September, the precipitation amount is 96 mm (3.8 in) spread over a duration of 12 days.
In Castel San Niccolo in September, humidity is 66%. With an average temperature of 17°C (64°F), this humidity feels like a gentle embrace, making it quite comfortable for traveling as long as you stay hydrated and wear light clothing.
In Castel San Niccolo in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Castel San Niccolo.
UV Risk Categories
Weather in Castel San Niccolo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Castel San Niccolo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 61 mm (2.4 inches) | 84% | low |
| February Weather | 5°C (42°F) | 106 mm (4.2 inches) | 76% | moderate |
| March Weather | 7°C (44°F) | 91 mm (3.6 inches) | 68% | high |
| April Weather | 10°C (51°F) | 100 mm (3.9 inches) | 70% | high |
| May Weather | 14°C (58°F) | 140 mm (5.5 inches) | 69% | very high |
| June Weather | 20°C (68°F) | 67 mm (2.6 inches) | 62% | very high |
| July Weather | 22°C (72°F) | 56 mm (2.2 inches) | 57% | very high |
| August Weather | 22°C (72°F) | 54 mm (2.1 inches) | 55% | very high |
| September Weather | 17°C (64°F) | 96 mm (3.8 inches) | 66% | high |
| October Weather | 13°C (55°F) | 99 mm (3.9 inches) | 79% | moderate |
| November Weather | 8°C (47°F) | 142 mm (5.6 inches) | 84% | moderate |
| December Weather | 4°C (40°F) | 130 mm (5.1 inches) | 83% | low |