Last updated: June 24, 2025
In December, the average temperature in Morgantown, United States hovers around 3°C (38°F). Expect chilly days with minimums plunging to -18°C (1°F), while maximums can reach a surprising 19°C (67°F). During this month, precipitation totals approximately 95 mm (3.7 in) over 10 days, contributing to a high average humidity of 87%. Be prepared for a mix of cold and damp conditions!
In December in Morgantown, the average temperature is 3°C (38°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -18°C (1°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both cold and mild weather.
In Morgantown in December, the total precipitation amount is 95 mm (3.7 in) over the course of 10 days.
In Morgantown in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Morgantown 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 Morgantown, you can check the information here.
UV Risk Categories
Weather in Morgantown varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Morgantown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 85 mm (3.3 inches) | 87% | moderate |
| February Weather | 2°C (36°F) | 107 mm (4.2 inches) | 85% | moderate |
| March Weather | 7°C (45°F) | 135 mm (5.3 inches) | 86% | high |
| April Weather | 12°C (54°F) | 114 mm (4.5 inches) | 84% | very high |
| May Weather | 18°C (66°F) | 136 mm (5.3 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 129 mm (5.1 inches) | 82% | extreme |
| July Weather | 25°C (78°F) | 115 mm (4.5 inches) | 79% | very high |
| August Weather | 24°C (75°F) | 104 mm (4.1 inches) | 70% | very high |
| September Weather | 21°C (71°F) | 79 mm (3.1 inches) | 69% | very high |
| October Weather | 15°C (59°F) | 101 mm (4.0 inches) | 76% | high |
| November Weather | 6°C (43°F) | 103 mm (4.1 inches) | 88% | moderate |
| December Weather | 3°C (38°F) | 95 mm (3.7 inches) | 87% | moderate |