Last updated: June 24, 2025
In December, the average temperature in Westmoreland, United States hovers around -2°C (29°F). While the mercury can plummet to a chilling -23°C (-9°F), it can also rise to a milder 15°C (59°F). Expect 112 mm (4.4 in) of precipitation over 11 days, contributing to an average humidity of 84%.
In December in Westmoreland, the average temperature is -2°C (29°F), with maximums reaching up to 15°C (59°F) and minimums dropping as low as -23°C (-9°F). Be prepared for a range of temperatures when traveling to Westmoreland during this time, ensuring you pack both warm and mild weather clothing.
In Westmoreland in December, the precipitation amount is 112 mm (4.4 in) that occurs over the course of 11 days.
In Westmoreland in December, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.
In Westmoreland 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 Westmoreland, you can visit Hourly UV Index in Westmoreland.
UV Risk Categories
Weather in Westmoreland varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Westmoreland, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (24°F) | 75 mm (3.0 inches) | 89% | moderate |
| February Weather | -3°C (27°F) | 89 mm (3.5 inches) | 88% | moderate |
| March Weather | 1°C (33°F) | 75 mm (2.9 inches) | 86% | high |
| April Weather | 7°C (45°F) | 130 mm (5.1 inches) | 84% | very high |
| May Weather | 14°C (57°F) | 87 mm (3.4 inches) | 76% | very high |
| June Weather | 19°C (67°F) | 85 mm (3.3 inches) | 72% | very high |
| July Weather | 22°C (72°F) | 126 mm (5.0 inches) | 66% | very high |
| August Weather | 21°C (70°F) | 97 mm (3.8 inches) | 64% | very high |
| September Weather | 17°C (63°F) | 88 mm (3.4 inches) | 72% | high |
| October Weather | 11°C (52°F) | 148 mm (5.8 inches) | 81% | high |
| November Weather | 3°C (37°F) | 100 mm (3.9 inches) | 87% | moderate |
| December Weather | -2°C (29°F) | 112 mm (4.4 inches) | 84% | low |