Last updated: June 24, 2025
In December, the average temperature in Geneva, United States hovers around -4°C (25°F). However, be prepared for the extremes, as temperatures can plunge to a chilling -24°C (-11°F) or rise to a pleasant 19°C (66°F). Expect about 39 mm (1.6 in) of precipitation spread over 6 days, and a notably high average humidity of 83% makes for a rather brisk atmosphere.
In December in Geneva, the average temperature is -4°C (25°F), with maximums reaching 19°C (66°F) and minimums plunging as low as -24°C (-11°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to ensure comfort during their visit.
In Geneva in December, the precipitation amount is 39 mm (1.6 in) over the course of 6 days.
In Geneva in December, humidity is 83%. With an average temperature of -4°C (25°F), this humidity feels like a chilling fog enveloping you, making every breath feel heavy and damp, which can quickly dampen the spirit of travel as you navigate the frosty landscape.
In Geneva in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Geneva, you can check the information here.
UV Risk Categories
Weather in Geneva varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Geneva, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 36 mm (1.4 inches) | 82% | moderate |
| February Weather | -9°C (17°F) | 46 mm (1.8 inches) | 84% | moderate |
| March Weather | 1°C (34°F) | 69 mm (2.7 inches) | 80% | moderate |
| April Weather | 7°C (44°F) | 86 mm (3.4 inches) | 81% | very high |
| May Weather | 15°C (59°F) | 146 mm (5.8 inches) | 74% | very high |
| June Weather | 22°C (71°F) | 139 mm (5.5 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 103 mm (4.1 inches) | 80% | very high |
| August Weather | 21°C (70°F) | 110 mm (4.3 inches) | 77% | very high |
| September Weather | 18°C (65°F) | 124 mm (4.9 inches) | 75% | very high |
| October Weather | 9°C (49°F) | 101 mm (4.0 inches) | 80% | moderate |
| November Weather | 1°C (34°F) | 45 mm (1.8 inches) | 87% | moderate |
| December Weather | -4°C (25°F) | 39 mm (1.6 inches) | 83% | moderate |