Last updated: August 27, 2025
The average temperature in Castel San Pietro, Switzerland during May is a pleasant 17°C (63°F). While you may experience cooler days with a minimum of 5°C (41°F), the weather can also warm up to a maximum of 32°C (89°F). Expect about 143 mm (5.6 in) of precipitation spread over 16 days, with an average humidity level of 74%, making it a month of varied conditions.
In May in Castel San Pietro, the average temperature is 17°C (63°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 5°C (41°F). Travelers should be prepared for a mix of warm and cool weather, making it ideal for layering clothing.
In Castel San Pietro in May, the precipitation amount is 143 mm (5.6 in) spread over 16 days.
In Castel San Pietro in May, humidity is 74%. With an average temperature of 17°C (63°F), this humidity feels like a gentle embrace, making outdoor exploration comfortable yet slightly enveloped in warmth, perfect for leisurely strolls but requiring ample hydration for prolonged activities.
In Castel San Pietro in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Castel San Pietro.
UV Risk Categories
Weather in Castel San Pietro varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Castel San Pietro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 42 mm (1.7 inches) | 88% | low |
| February Weather | 6°C (43°F) | 46 mm (1.8 inches) | 81% | moderate |
| March Weather | 9°C (48°F) | 88 mm (3.5 inches) | 76% | moderate |
| April Weather | 13°C (56°F) | 124 mm (4.9 inches) | 77% | high |
| May Weather | 17°C (63°F) | 143 mm (5.6 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 161 mm (6.4 inches) | 71% | very high |
| July Weather | 24°C (75°F) | 164 mm (6.5 inches) | 67% | very high |
| August Weather | 24°C (75°F) | 136 mm (5.3 inches) | 64% | very high |
| September Weather | 19°C (66°F) | 146 mm (5.8 inches) | 74% | high |
| October Weather | 14°C (58°F) | 152 mm (6.0 inches) | 87% | moderate |
| November Weather | 9°C (49°F) | 169 mm (6.7 inches) | 88% | moderate |
| December Weather | 5°C (41°F) | 94 mm (3.7 inches) | 85% | low |