Last updated: June 24, 2025
In December, the average temperature in Merrill, United States hovers around -6°C (22°F), with extremes ranging from a frigid -30°C (-22°F) to a mild 14°C (58°F). This time of year sees 53 mm (2.1 in) of precipitation spread over 8 days, contributing to the region's 87% average humidity. Prepare for a chilly yet captivating experience!
In December in Merrill, the average temperature is -6°C (22°F). Maximum temperatures can reach 14°C (58°F), while minimums can drop to as low as -30°C (-22°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to stay comfortable in the cold conditions.
In Merrill in December, the total precipitation amount is 53 mm (2.1 in) over the course of 8 days.
In Merrill in December, humidity is 87%. With an average temperature of -6°C (22°F), this humidity feels like a chilling weight on your skin, making traveling quite uncomfortable as you face an icy dampness that seeps into your layers, amplifying the cold and making every step feel arduous.
In Merrill 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 Merrill, you can visit Hourly UV Index in Merrill.
UV Risk Categories
Weather in Merrill varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Merrill, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (16°F) | 32 mm (1.3 inches) | 89% | low |
| February Weather | -9°C (16°F) | 51 mm (2.0 inches) | 90% | moderate |
| March Weather | -1°C (30°F) | 49 mm (1.9 inches) | 87% | moderate |
| April Weather | 5°C (41°F) | 98 mm (3.8 inches) | 84% | high |
| May Weather | 13°C (56°F) | 100 mm (3.9 inches) | 77% | very high |
| June Weather | 19°C (66°F) | 99 mm (3.9 inches) | 75% | very high |
| July Weather | 21°C (70°F) | 119 mm (4.7 inches) | 74% | very high |
| August Weather | 19°C (67°F) | 117 mm (4.6 inches) | 73% | very high |
| September Weather | 15°C (60°F) | 85 mm (3.3 inches) | 78% | high |
| October Weather | 8°C (46°F) | 116 mm (4.6 inches) | 84% | moderate |
| November Weather | -1°C (31°F) | 49 mm (1.9 inches) | 89% | moderate |
| December Weather | -6°C (22°F) | 53 mm (2.1 inches) | 87% | low |