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December Weather in Morgantown, United States

Last updated: June 24, 2025

In Morgantown, United States, the average temperature in December is a comfortable 12°C (54°F). However, be prepared for a range of weather, as temperatures can dip to a chilly -2°C (28°F) or rise to a warm 28°C (83°F). Expect about 128 mm (5.0 in) of precipitation over 12 days, contributing to an average humidity of 88%.

December Temperature in Morgantown

In December in Morgantown, the average temperature is 12°C (54°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as -2°C (28°F). Be prepared for a wide range of temperatures when traveling to Morgantown during this time.

December Weather in Morgantown: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Morgantown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Morgantown, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (83°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec505563667580828279705754
Data source: Temperature data for Morgantown generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Morgantown

In Morgantown in December, the precipitation amount is 128 mm (5.0 in) over the course of 12 days.

December Precipitation Trends in Morgantown

The chart displays monthly precipitation patterns in Morgantown, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Morgantown, December typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec11413311316316313713712212511483128
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Morgantown

In Morgantown in December, humidity is 88%. With an average temperature of 12°C (54°F), this humidity feels like a thick, damp blanket, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat even in cooler weather.

December Average Humidity in Morgantown

This chart illustrates the average monthly humidity levels in Morgantown, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Morgantown is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Morgantown

In Morgantown in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Morgantown for better planning.

Maximum UV Index Levels in Morgantown for December

The chart shows the monthly maximum UV Index (UVI) for Morgantown in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Morgantown typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121110864
Data source: Morgantown December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Morgantown Compares to Other Months

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.

This table compares monthly weather conditions in Morgantown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)114 mm (4.5 inches)83%moderate
February Weather13°C (56°F)133 mm (5.2 inches)83%high
March Weather17°C (63°F)113 mm (4.5 inches)80%very high
April Weather19°C (66°F)163 mm (6.4 inches)81%extreme
May Weather24°C (75°F)163 mm (6.4 inches)81%extreme
June Weather26°C (80°F)137 mm (5.4 inches)78%extreme
July Weather28°C (82°F)137 mm (5.4 inches)79%extreme
August Weather28°C (82°F)122 mm (4.8 inches)79%extreme
September Weather26°C (79°F)125 mm (4.9 inches)79%very high
October Weather21°C (70°F)114 mm (4.5 inches)77%very high
November Weather14°C (57°F)83 mm (3.3 inches)85%high
December Weather12°C (54°F)128 mm (5.0 inches)88%moderate

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