Last updated: June 24, 2025
In December, the average temperature in Marion, United States hovers around -3°C (27°F), with extremes ranging from a chilly -24°C (-11°F) to a mild 12°C (54°F). Expect 70 mm (2.7 in) of precipitation over about 14 days, contributing to an average humidity level of a remarkable 95%. Be prepared for a moist and frosty experience!
In December in Marion, the average temperature is -3°C (27°F), with maximums reaching up to 12°C (54°F) and minimums dropping as low as -24°C (-11°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for their visit.
In Marion in December, the precipitation amount is 70 mm (2.7 in) over the course of 14 days.
In Marion in December, humidity is 95%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that penetrates your clothes, making every breath feel heavy and damp, which can be quite uncomfortable for traveling.
In Marion 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 Marion, you can visit Hourly UV Index in Marion.
UV Risk Categories
Weather in Marion varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Marion, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 51 mm (2.0 inches) | 93% | low |
| February Weather | -7°C (20°F) | 82 mm (3.2 inches) | 92% | moderate |
| March Weather | 0°C (32°F) | 53 mm (2.1 inches) | 89% | high |
| April Weather | 4°C (39°F) | 78 mm (3.1 inches) | 85% | high |
| May Weather | 10°C (50°F) | 80 mm (3.2 inches) | 80% | very high |
| June Weather | 14°C (58°F) | 58 mm (2.3 inches) | 78% | very high |
| July Weather | 19°C (67°F) | 21 mm (0.8 inches) | 77% | very high |
| August Weather | 19°C (66°F) | 30 mm (1.2 inches) | 66% | very high |
| September Weather | 13°C (55°F) | 40 mm (1.6 inches) | 67% | high |
| October Weather | 5°C (41°F) | 66 mm (2.6 inches) | 77% | moderate |
| November Weather | 0°C (32°F) | 68 mm (2.7 inches) | 89% | moderate |
| December Weather | -3°C (27°F) | 70 mm (2.7 inches) | 95% | low |