Last updated: June 24, 2025
In December, the average temperature in Grand Forks, United States is a chilly -9°C (17°F), with minimums plummeting to -34°C (-29°F) and maximums reaching up to 9°C (48°F). During this month, expect around 36 mm (1.4 in) of precipitation over approximately 7 days, coupled with a high average humidity of 86%. Prepare for an invigorating winter experience!
In December in Grand Forks, the average temperature is -9°C (17°F), with a maximum that can reach 9°C (48°F) and a minimum that can drop as low as -34°C (-29°F). Travelers should be prepared for extreme cold temperatures while visiting during this time.
In Grand Forks in December, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.
In Grand Forks in December humidity is 86%. With an average temperature of -9°C (17°F), this humidity feels like an intense chill that seeps into your bones, making travel feel even more arduous as every breath brings crisp air that numbs your skin and slows your steps.
In Grand Forks 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 Grand Forks, you can visit Hourly UV Index in Grand Forks.
UV Risk Categories
Weather in Grand Forks varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grand Forks, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -13°C (9°F) | 18 mm (0.7 inches) | 90% | low |
| February Weather | -14°C (8°F) | 20 mm (0.8 inches) | 92% | moderate |
| March Weather | -3°C (26°F) | 24 mm (1.0 inches) | 85% | moderate |
| April Weather | 4°C (39°F) | 35 mm (1.4 inches) | 81% | high |
| May Weather | 13°C (56°F) | 55 mm (2.2 inches) | 75% | very high |
| June Weather | 20°C (69°F) | 83 mm (3.3 inches) | 79% | very high |
| July Weather | 22°C (72°F) | 59 mm (2.3 inches) | 76% | very high |
| August Weather | 20°C (68°F) | 76 mm (3.0 inches) | 78% | very high |
| September Weather | 15°C (60°F) | 73 mm (2.9 inches) | 77% | high |
| October Weather | 6°C (44°F) | 80 mm (3.1 inches) | 79% | moderate |
| November Weather | -3°C (27°F) | 26 mm (1.0 inches) | 86% | low |
| December Weather | -9°C (17°F) | 36 mm (1.4 inches) | 86% | low |