Last updated: June 24, 2025
In December, the average temperature in Winchester, United States hovers around -3°C (27°F), with extremes that can plunge to a chilling -27°C (-16°F) and peak at a mild 17°C (62°F). This month typically sees about 54 mm (2.1 in) of precipitation spread over 7 days, while the atmosphere remains quite humid with an average humidity of 87%.
In December, in Winchester, the average temperature is -3°C (27°F). The maximum can reach 17°C (62°F), while the minimum can drop as low as -27°C (-16°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and milder conditions.
In Winchester in December, the precipitation amount is 54 mm (2.1 in) over a duration of 7 days.
In Winchester 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 Winchester 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 Winchester, you can visit Hourly UV Index in Winchester.
UV Risk Categories
Weather in Winchester varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Winchester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 42 mm (1.6 inches) | 89% | moderate |
| February Weather | -7°C (20°F) | 50 mm (2.0 inches) | 90% | moderate |
| March Weather | 1°C (33°F) | 61 mm (2.4 inches) | 87% | moderate |
| April Weather | 6°C (44°F) | 96 mm (3.8 inches) | 84% | very high |
| May Weather | 14°C (58°F) | 103 mm (4.1 inches) | 77% | very high |
| June Weather | 21°C (69°F) | 104 mm (4.1 inches) | 75% | very high |
| July Weather | 23°C (74°F) | 112 mm (4.4 inches) | 74% | very high |
| August Weather | 21°C (70°F) | 112 mm (4.4 inches) | 73% | very high |
| September Weather | 17°C (63°F) | 82 mm (3.2 inches) | 78% | high |
| October Weather | 10°C (50°F) | 100 mm (3.9 inches) | 84% | moderate |
| November Weather | 2°C (35°F) | 50 mm (2.0 inches) | 89% | moderate |
| December Weather | -3°C (27°F) | 54 mm (2.1 inches) | 87% | low |