Last updated: June 24, 2025
In December, the average temperature in Wilton, United States hovers around 2°C (37°F), with minimums dipping to a chilly -13°C (9°F) and maximums reaching a mild 16°C (61°F). Expect 114 mm (4.5 in) of precipitation over 11 days, accompanied by an average humidity of 80%. Stay prepared for an interesting mix of weather!
In December in Wilton, the average temperature is 2°C (37°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -13°C (9°F).
Travelers should be prepared for chilly conditions but can also enjoy occasional warmer days.
In Wilton in December, the total precipitation amount is 114 mm (4.5 in) spread over 11 days.
In Wilton in December, humidity is 80%. With an average temperature of 2°C (37°F), this humidity feels like a brisk chill that pierces through your layers, making every step outside feel invigorating yet uncomfortable, especially for travelers unaccustomed to such dampness in the cold.
In Wilton 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 Wilton, you can visit Hourly UV Index in Wilton.
UV Risk Categories
Weather in Wilton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Wilton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 69 mm (2.7 inches) | 84% | moderate |
| February Weather | 1°C (35°F) | 102 mm (4.0 inches) | 82% | moderate |
| March Weather | 4°C (40°F) | 92 mm (3.6 inches) | 81% | high |
| April Weather | 10°C (50°F) | 120 mm (4.7 inches) | 78% | very high |
| May Weather | 15°C (60°F) | 112 mm (4.4 inches) | 69% | very high |
| June Weather | 21°C (70°F) | 94 mm (3.7 inches) | 69% | very high |
| July Weather | 24°C (76°F) | 129 mm (5.1 inches) | 62% | very high |
| August Weather | 23°C (75°F) | 110 mm (4.3 inches) | 65% | very high |
| September Weather | 20°C (68°F) | 106 mm (4.2 inches) | 68% | very high |
| October Weather | 14°C (58°F) | 139 mm (5.5 inches) | 74% | high |
| November Weather | 7°C (45°F) | 92 mm (3.6 inches) | 82% | moderate |
| December Weather | 2°C (37°F) | 114 mm (4.5 inches) | 80% | low |