Last updated: June 24, 2025
In December, the average temperature in Forest, United States hovers around 6°C (43°F). Expect a wide temperature range, with minimums dropping to -13°C (9°F) and maximums reaching up to 22°C (72°F). During this month, you can anticipate approximately 103 mm (4.1 in) of precipitation over 9 days, and a notable average humidity of 85%. Stay prepared for the varied climate!
In December in Forest, the average temperature is 6°C (43°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -13°C (9°F). Be prepared for a wide range of temperatures when planning your trip!
In Forest in December, the precipitation amount is 103 mm (4.1 in) distributed over 9 days.
In Forest in December, humidity is 85%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel feel more uncomfortable and limiting your enjoyment of the sights as you navigate the wet, brisk air.
In Forest in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Forest, you can check the information here.
UV Risk Categories
Weather in Forest varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Forest, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 72 mm (2.8 inches) | 84% | moderate |
| February Weather | 7°C (44°F) | 112 mm (4.4 inches) | 84% | high |
| March Weather | 10°C (50°F) | 69 mm (2.7 inches) | 84% | high |
| April Weather | 15°C (59°F) | 128 mm (5.0 inches) | 82% | very high |
| May Weather | 20°C (68°F) | 113 mm (4.5 inches) | 82% | very high |
| June Weather | 24°C (75°F) | 101 mm (4.0 inches) | 83% | extreme |
| July Weather | 27°C (80°F) | 58 mm (2.3 inches) | 79% | very high |
| August Weather | 25°C (78°F) | 95 mm (3.8 inches) | 77% | very high |
| September Weather | 22°C (72°F) | 108 mm (4.2 inches) | 75% | very high |
| October Weather | 17°C (63°F) | 113 mm (4.5 inches) | 81% | high |
| November Weather | 9°C (48°F) | 78 mm (3.1 inches) | 87% | moderate |
| December Weather | 6°C (43°F) | 103 mm (4.1 inches) | 85% | moderate |