Last updated: June 24, 2025
In December, the average temperature in Grand Rapids, United States hovers around 1°C (35°F), with extremes ranging from a bone-chilling -23°C (-10°F) to a mild 17°C (63°F). Expect 56 mm (2.2 in) of precipitation spread over 10 days, while the average humidity sits at a high 86%, making this a notably crisp and damp time of year.
In December in Grand Rapids, the average temperature is 1°C (35°F). Maximum temperatures can reach 17°C (63°F), while minimums can plummet to as low as -23°C (-10°F). Travelers should be prepared for a wide range of temperatures, making layers essential for comfort during their visit.
In Grand Rapids in December, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.
In Grand Rapids in December, humidity is 86%. With an average temperature of 1°C (35°F), this humidity feels like a biting chill that wraps around you, making outdoor exploration uncomfortable and requiring extra layers to stay warm while navigating the damp air.
In Grand Rapids 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 Rapids, you can visit Hourly UV Index in Grand Rapids.
UV Risk Categories
Weather in Grand Rapids varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grand Rapids, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 69 mm (2.7 inches) | 88% | moderate |
| February Weather | -1°C (30°F) | 72 mm (2.8 inches) | 87% | moderate |
| March Weather | 4°C (40°F) | 84 mm (3.3 inches) | 87% | high |
| April Weather | 10°C (49°F) | 93 mm (3.7 inches) | 87% | very high |
| May Weather | 16°C (62°F) | 145 mm (5.7 inches) | 81% | very high |
| June Weather | 22°C (72°F) | 106 mm (4.2 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 112 mm (4.4 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 88 mm (3.5 inches) | 78% | very high |
| September Weather | 20°C (68°F) | 59 mm (2.3 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 92 mm (3.6 inches) | 82% | high |
| November Weather | 5°C (41°F) | 83 mm (3.3 inches) | 89% | moderate |
| December Weather | 1°C (35°F) | 56 mm (2.2 inches) | 86% | low |