Last updated: June 24, 2025
In December, the average temperature in Madison, United States hovers around -4°C (25°F). However, it can experience extremes, plunging to a chilling -25°C (-14°F) at its minimum and peaking at a mild 14°C (58°F). Residents can expect approximately 35 mm (1.4 in) of precipitation over 4 days, coupled with an average humidity of 83%. Be prepared for a diverse range of weather conditions!
In December in Madison, the average temperature is -4°C (25°F), with maximums potentially reaching 14°C (58°F) and minimums dropping as low as -25°C (-14°F). It's essential to pack warm clothing for your travels, as conditions can vary significantly.
In Madison in December, the precipitation amount is 35 mm (1.4 in) over a span of 4 days.
In Madison 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 Madison 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 Madison, you can visit Hourly UV Index in Madison.
UV Risk Categories
Weather in Madison varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Madison, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 20 mm (0.8 inches) | 80% | low |
| February Weather | -8°C (18°F) | 22 mm (0.9 inches) | 84% | moderate |
| March Weather | 1°C (33°F) | 60 mm (2.4 inches) | 75% | moderate |
| April Weather | 6°C (43°F) | 74 mm (2.9 inches) | 79% | very high |
| May Weather | 14°C (58°F) | 108 mm (4.3 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 81 mm (3.2 inches) | 81% | extreme |
| July Weather | 23°C (74°F) | 98 mm (3.9 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 116 mm (4.6 inches) | 80% | very high |
| September Weather | 18°C (64°F) | 108 mm (4.3 inches) | 75% | very high |
| October Weather | 8°C (47°F) | 78 mm (3.1 inches) | 77% | moderate |
| November Weather | 1°C (34°F) | 27 mm (1.1 inches) | 85% | moderate |
| December Weather | -4°C (25°F) | 35 mm (1.4 inches) | 83% | low |