Last updated: June 24, 2025
In La Crosse, United States, the average temperature in December is a cool 7°C (45°F). While you might experience a minimum drop to -9°C (16°F), the mercury can soar to a pleasant 23°C (73°F) on warmer days. Be prepared for around 98 mm (3.9 in) of precipitation over 10 days, and expect an average humidity of 85%, making for a refreshingly damp atmosphere.
In December in La Crosse, the average temperature is 7°C (45°F), with maximums reaching 23°C (73°F) and minimums dropping as low as -9°C (16°F). Be prepared for a wide range of temperatures when traveling to La Crosse during this month.
In La Crosse in December, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.
In La Crosse in December, humidity is 85%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.
In La Crosse 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 La Crosse, you can check the information here.
UV Risk Categories
Weather in La Crosse varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in La Crosse, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 83 mm (3.2 inches) | 84% | moderate |
| February Weather | 8°C (47°F) | 104 mm (4.1 inches) | 84% | high |
| March Weather | 11°C (51°F) | 82 mm (3.2 inches) | 84% | high |
| April Weather | 16°C (61°F) | 104 mm (4.1 inches) | 82% | very high |
| May Weather | 21°C (69°F) | 119 mm (4.7 inches) | 82% | very high |
| June Weather | 24°C (76°F) | 120 mm (4.7 inches) | 83% | extreme |
| July Weather | 27°C (80°F) | 101 mm (4.0 inches) | 79% | extreme |
| August Weather | 26°C (78°F) | 142 mm (5.6 inches) | 77% | very high |
| September Weather | 23°C (74°F) | 104 mm (4.1 inches) | 75% | very high |
| October Weather | 18°C (65°F) | 102 mm (4.0 inches) | 81% | very high |
| November Weather | 10°C (51°F) | 79 mm (3.1 inches) | 87% | moderate |
| December Weather | 7°C (45°F) | 98 mm (3.9 inches) | 85% | moderate |