Last updated: August 27, 2025
In September, the average temperature in Riva San Vitale, Switzerland hovers around 17°C (63°F), offering a pleasant climate. Expect minimum temperatures to dip to 4°C (39°F), while the mercury can rise to a comfortable 26°C (80°F). Be prepared for some rainfall, with an average precipitation of 141 mm (5.5 in) over 12 days, and keep in mind the overall humidity level sits at a muggy 74%.
In September in Riva San Vitale, the average temperature is 17°C (63°F). The maximum can reach 26°C (80°F), and the minimum can be as low as 4°C (39°F). This makes Riva San Vitale an ideal destination for travelers seeking mild weather and comfortable outdoor activities.
In Riva San Vitale in September, the precipitation amount is 141 mm (5.5 in), occurring over the course of 12 days.
In Riva San Vitale in September, 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 Riva San Vitale 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 Riva San Vitale.
UV Risk Categories
Weather in Riva San Vitale varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Riva San Vitale, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 47 mm (1.9 inches) | 88% | low |
| February Weather | 5°C (41°F) | 47 mm (1.9 inches) | 81% | moderate |
| March Weather | 7°C (45°F) | 94 mm (3.7 inches) | 76% | high |
| April Weather | 11°C (52°F) | 140 mm (5.5 inches) | 77% | high |
| May Weather | 15°C (59°F) | 173 mm (6.8 inches) | 74% | very high |
| June Weather | 19°C (67°F) | 196 mm (7.7 inches) | 71% | very high |
| July Weather | 21°C (70°F) | 167 mm (6.6 inches) | 67% | very high |
| August Weather | 21°C (70°F) | 174 mm (6.9 inches) | 64% | very high |
| September Weather | 17°C (63°F) | 141 mm (5.5 inches) | 74% | high |
| October Weather | 12°C (55°F) | 206 mm (8.1 inches) | 87% | moderate |
| November Weather | 8°C (46°F) | 174 mm (6.9 inches) | 88% | moderate |
| December Weather | 3°C (39°F) | 104 mm (4.1 inches) | 85% | low |