Last updated: June 24, 2025
In Wausau, United States, the average temperature in December hovers around -5°C (23°F), with fluctuations that can see minimums plummeting to -30°C (-22°F) and highs reaching up to 15°C (59°F). During this month, expect about 52 mm (2.1 in) of precipitation spread over 8 days, and a notable average humidity of 87%. Brace yourself for a chilly yet dynamic winter experience!
In December in Wausau, the average temperature is -5°C (23°F). Maximums can reach 15°C (59°F), and minimums can drop as low as -30°C (-22°F). Be prepared for a wide range of temperatures during your travels!
In Wausau in December, the total precipitation amount is 52 mm (2.1 in) over the course of 8 days.
In Wausau in December humidity is 87%. With an average temperature of -5°C (23°F), this humidity feels like a heavy, damp blanket enveloping you, making even the cold air seem more biting and clammy, which can be quite uncomfortable for traveling.
In Wausau in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Wausau, you can visit Hourly UV Index in Wausau.
UV Risk Categories
Weather in Wausau varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Wausau, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (17°F) | 34 mm (1.3 inches) | 89% | low |
| February Weather | -8°C (17°F) | 50 mm (2.0 inches) | 90% | moderate |
| March Weather | -1°C (31°F) | 53 mm (2.1 inches) | 87% | moderate |
| April Weather | 5°C (42°F) | 98 mm (3.9 inches) | 84% | high |
| May Weather | 13°C (56°F) | 103 mm (4.1 inches) | 77% | very high |
| June Weather | 19°C (67°F) | 102 mm (4.0 inches) | 75% | very high |
| July Weather | 22°C (71°F) | 117 mm (4.6 inches) | 74% | very high |
| August Weather | 19°C (67°F) | 121 mm (4.8 inches) | 73% | very high |
| September Weather | 16°C (61°F) | 83 mm (3.3 inches) | 78% | high |
| October Weather | 8°C (47°F) | 109 mm (4.3 inches) | 84% | moderate |
| November Weather | 0°C (32°F) | 50 mm (2.0 inches) | 89% | moderate |
| December Weather | -5°C (23°F) | 52 mm (2.1 inches) | 87% | low |