Last updated: June 24, 2025
In December, the average temperature in Marion, United States hovers around -4°C (25°F). However, be prepared for a range of extremes, with minimum temperatures plunging to -28°C (-18°F) and highs reaching up to 16°C (62°F). Expect about 54 mm (2.1 in) of precipitation spread over 7 days, coupled with a high average humidity of 87%—ideal conditions for cozy indoor activities!
In December in Marion, the average temperature is -4°C (25°F). The maximum can reach 16°C (62°F) and the minimum can be as low as -28°C (-18°F). Be prepared for a wide range of temperatures when traveling to Marion this month, so pack accordingly!
In Marion in December, the precipitation amount is 54 mm (2.1 in) over a duration of 7 days.
In Marion in December humidity is 87%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that clings to your skin, making every step outside feel like an endeavor as the cold damp air numbs your senses and weighs you down, creating an atmosphere that is both invigorating and challenging 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 | -8°C (19°F) | 37 mm (1.5 inches) | 89% | low |
| February Weather | -8°C (19°F) | 50 mm (2.0 inches) | 90% | moderate |
| March Weather | 0°C (32°F) | 59 mm (2.3 inches) | 87% | moderate |
| April Weather | 6°C (42°F) | 102 mm (4.0 inches) | 84% | high |
| May Weather | 14°C (57°F) | 106 mm (4.2 inches) | 77% | very high |
| June Weather | 20°C (68°F) | 110 mm (4.3 inches) | 75% | very high |
| July Weather | 22°C (72°F) | 115 mm (4.5 inches) | 74% | very high |
| August Weather | 20°C (68°F) | 123 mm (4.8 inches) | 73% | very high |
| September Weather | 16°C (62°F) | 84 mm (3.3 inches) | 78% | high |
| October Weather | 9°C (48°F) | 102 mm (4.0 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 49 mm (1.9 inches) | 89% | moderate |
| December Weather | -4°C (25°F) | 54 mm (2.1 inches) | 87% | low |