Last updated: June 24, 2025
In December, the average temperature in Harrison, United States hovers around -3°C (27°F). While you might experience chilly lows of -28°C (-17°F), it’s possible to enjoy the occasional warm day, reaching up to 17°C (64°F). Be prepared for about 51 mm (2.0 in) of precipitation spread over 7 days, and expect a relatively high average humidity of 87%.
In December in Harrison, the average temperature is -3°C (27°F). The maximum can reach 17°C (64°F), while the minimum can drop as low as -28°C (-17°F). Travelers should be prepared for a wide range of temperatures and dress in layers to enjoy their visit comfortably.
In Harrison in December, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.
In Harrison in December humidity is 87%. With an average temperature of -3°C (27°F), this humidity feels like an icy blanket that wraps around you, making outdoor activities challenging as the cold air mingles with the dampness, leaving travelers feeling chilled to the bone even in short bursts outside.
In Harrison 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 Harrison, you can visit Hourly UV Index in Harrison.
UV Risk Categories
Weather in Harrison varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Harrison, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (21°F) | 42 mm (1.7 inches) | 89% | moderate |
| February Weather | -6°C (21°F) | 48 mm (1.9 inches) | 90% | moderate |
| March Weather | 1°C (34°F) | 60 mm (2.3 inches) | 87% | moderate |
| April Weather | 6°C (43°F) | 96 mm (3.8 inches) | 84% | high |
| May Weather | 14°C (57°F) | 104 mm (4.1 inches) | 77% | very high |
| June Weather | 20°C (69°F) | 103 mm (4.1 inches) | 75% | very high |
| July Weather | 23°C (73°F) | 108 mm (4.3 inches) | 74% | very high |
| August Weather | 21°C (70°F) | 105 mm (4.1 inches) | 73% | very high |
| September Weather | 17°C (63°F) | 71 mm (2.8 inches) | 78% | high |
| October Weather | 10°C (50°F) | 96 mm (3.8 inches) | 84% | moderate |
| November Weather | 2°C (35°F) | 49 mm (1.9 inches) | 89% | moderate |
| December Weather | -3°C (27°F) | 51 mm (2.0 inches) | 87% | low |