Last updated: June 24, 2025
In September, the average temperature in Geneva, United States settles around 18°C (65°F), providing a pleasant backdrop for various activities. Visitors can expect a minimum temperature of 5°C (41°F) and a maximum of 33°C (91°F), showcasing the region's diverse climate. Moreover, with an average precipitation of 81 mm (3.2 in) spread over 9 days, it's wise to pack an umbrella. Lastly, the average humidity level is 78%, adding a touch of tropical warmth to the atmosphere.
In September in Geneva, the average temperature is 18°C (65°F). The maximum can reach 33°C (91°F), while the minimum can drop as low as 5°C (41°F). Overall, it's a great time to explore Geneva with comfortable temperatures and a variety of weather experiences.
In Geneva in September, the precipitation amount is 81 mm (3.2 in) spread over a duration of 9 days.
In Geneva in September, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.
In Geneva in September, 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 Geneva.
UV Risk Categories
Weather in Geneva varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Geneva, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 77 mm (3.0 inches) | 90% | moderate |
| February Weather | -2°C (29°F) | 81 mm (3.2 inches) | 90% | moderate |
| March Weather | 2°C (35°F) | 74 mm (2.9 inches) | 87% | high |
| April Weather | 8°C (46°F) | 112 mm (4.4 inches) | 88% | very high |
| May Weather | 14°C (58°F) | 116 mm (4.5 inches) | 82% | very high |
| June Weather | 20°C (68°F) | 89 mm (3.5 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 142 mm (5.6 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 95 mm (3.8 inches) | 76% | very high |
| September Weather | 18°C (65°F) | 81 mm (3.2 inches) | 78% | very high |
| October Weather | 12°C (55°F) | 142 mm (5.6 inches) | 84% | high |
| November Weather | 5°C (41°F) | 86 mm (3.4 inches) | 89% | moderate |
| December Weather | 0°C (33°F) | 91 mm (3.6 inches) | 86% | low |