Last updated: June 24, 2025
In December, the average temperature in Winchester, United States hovers around 3°C (37°F). Visitors should prepare for a range of conditions, as temperatures can dip to a chilly -19°C (-1°F) or rise to a pleasant 22°C (72°F). Expect some rain too, with an average precipitation amount of 33 mm (1.3 in) spread over about 3 days. Don't forget, the air is quite damp, with an average humidity of 84%!
In December in Winchester, the average temperature is 3°C (37°F). Maximums can reach up to 22°C (72°F), while minimums can drop as low as -19°C (-1°F). Visitors should be prepared for a wide range of temperatures and pack accordingly for their trip.
In Winchester in December, the precipitation amount is 33 mm (1.3 in) over the course of 3 days.
In Winchester in December humidity is 84%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions brisk and invigorating, yet requiring extra layers to stay comfortable.
In Winchester 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 Winchester, you can check the information here.
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 | -1°C (31°F) | 45 mm (1.8 inches) | 76% | moderate |
| February Weather | 0°C (32°F) | 31 mm (1.2 inches) | 77% | moderate |
| March Weather | 8°C (46°F) | 100 mm (3.9 inches) | 70% | high |
| April Weather | 12°C (54°F) | 88 mm (3.5 inches) | 73% | very high |
| May Weather | 19°C (66°F) | 218 mm (8.6 inches) | 82% | very high |
| June Weather | 25°C (77°F) | 125 mm (4.9 inches) | 82% | extreme |
| July Weather | 26°C (80°F) | 91 mm (3.6 inches) | 81% | extreme |
| August Weather | 25°C (77°F) | 136 mm (5.3 inches) | 78% | very high |
| September Weather | 22°C (72°F) | 85 mm (3.3 inches) | 71% | very high |
| October Weather | 13°C (56°F) | 115 mm (4.5 inches) | 71% | high |
| November Weather | 6°C (44°F) | 41 mm (1.6 inches) | 81% | moderate |
| December Weather | 3°C (37°F) | 33 mm (1.3 inches) | 84% | moderate |