Last updated: June 24, 2025
In Jefferson Valley-Yorktown, United States, the average temperature in December hovers around 2°C (36°F), with minimums dipping to -13°C (9°F) and maximums reaching 16°C (62°F). Expect about 109 mm (4.3 in) of precipitation spread over 11 days, contributing to the area's average humidity of 80%.
In December in Jefferson Valley-Yorktown, the average temperature is 2°C (36°F). The maximum can reach 16°C (62°F), while the minimum can drop to -13°C (9°F). Travelers should be prepared for cold weather and dress in layers to stay comfortable during their visit.
In Jefferson Valley-Yorktown in December, the precipitation amount is 109 mm (4.3 in), occurring over a span of 11 days.
In Jefferson Valley-Yorktown in December humidity is 80%. With an average temperature of 2°C (36°F), this humidity feels like a heavy, damp chill that seeps into your bones, making it challenging for outdoor adventures and often necessitating layered clothing to stay warm and comfortable while exploring.
In Jefferson Valley-Yorktown 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 Jefferson Valley-Yorktown, you can visit Hourly UV Index in Jefferson Valley-Yorktown.
UV Risk Categories
Weather in Jefferson Valley-Yorktown varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jefferson Valley-Yorktown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 70 mm (2.7 inches) | 84% | moderate |
| February Weather | 1°C (34°F) | 100 mm (3.9 inches) | 82% | moderate |
| March Weather | 4°C (40°F) | 90 mm (3.5 inches) | 81% | high |
| April Weather | 10°C (50°F) | 119 mm (4.7 inches) | 78% | very high |
| May Weather | 15°C (60°F) | 116 mm (4.6 inches) | 69% | very high |
| June Weather | 21°C (70°F) | 93 mm (3.7 inches) | 69% | very high |
| July Weather | 24°C (76°F) | 136 mm (5.4 inches) | 62% | very high |
| August Weather | 23°C (74°F) | 116 mm (4.6 inches) | 65% | very high |
| September Weather | 20°C (68°F) | 114 mm (4.5 inches) | 68% | very high |
| October Weather | 14°C (58°F) | 139 mm (5.5 inches) | 74% | high |
| November Weather | 7°C (44°F) | 90 mm (3.5 inches) | 82% | moderate |
| December Weather | 2°C (36°F) | 109 mm (4.3 inches) | 80% | low |