Last updated: June 24, 2025
In Monona, United States, the average temperature in December hovers around -2°C (30°F), with extreme lows dropping to a frigid -22°C (-7°F) and occasional highs reaching up to 18°C (66°F). During this month, you can expect about 48 mm (1.9 in) of precipitation spread over 7 days, contributing to an average humidity level of 81%. Stay warm and prepared for a mix of chilly and mild days!
In December in Monona, the average temperature is -2°C (30°F), with maximums that can reach 18°C (66°F) and minimums that can drop as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, making layering and appropriate winter gear essential.
In Monona in December, the total precipitation amount is 48 mm (1.9 in) over a span of 7 days.
In Monona in December humidity is 81%. With an average temperature of -2°C (30°F), this humidity feels like a biting chill that makes outdoor activities challenging, as the damp air seeps into your clothing, making you feel colder than the thermometer suggests.
In Monona 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 Monona, you can visit Hourly UV Index in Monona.
UV Risk Categories
Weather in Monona varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Monona, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 55 mm (2.1 inches) | 85% | moderate |
| February Weather | -5°C (23°F) | 54 mm (2.1 inches) | 85% | moderate |
| March Weather | 2°C (36°F) | 59 mm (2.3 inches) | 85% | moderate |
| April Weather | 8°C (46°F) | 99 mm (3.9 inches) | 85% | very high |
| May Weather | 15°C (60°F) | 132 mm (5.2 inches) | 78% | very high |
| June Weather | 21°C (71°F) | 118 mm (4.7 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 90 mm (3.5 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 109 mm (4.3 inches) | 76% | very high |
| September Weather | 18°C (65°F) | 118 mm (4.6 inches) | 79% | very high |
| October Weather | 11°C (52°F) | 117 mm (4.6 inches) | 83% | moderate |
| November Weather | 2°C (37°F) | 43 mm (1.7 inches) | 88% | moderate |
| December Weather | -2°C (30°F) | 48 mm (1.9 inches) | 81% | low |