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December Weather in Martinsburg, United States

Last updated: June 24, 2025

In December, the average temperature in Martinsburg, United States hovers around 3°C (38°F). Be prepared for a wide temperature range, with the minimum dipping to -13°C (10°F) and the maximum reaching a pleasant 20°C (68°F). Expect 94 mm (3.7 in) of precipitation spread over 8 days, contributing to an average humidity of 85%.

December Temperature in Martinsburg

In December in Martinsburg, the average temperature is 3°C (38°F). Maximums can reach 20°C (68°F), and minimums can be as low as -13°C (10°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Martinsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Martinsburg, December typically has an average temperature of 3°C (38°F), with highs reaching up to 20°C (68°F) and lows dropping to around -13°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec343844546473797670604538
Data source: Temperature data for Martinsburg 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 Martinsburg

In Martinsburg in December, the precipitation amount is 94 mm (3.7 in) over the course of 8 days.

December Precipitation Trends in Martinsburg

The chart displays monthly precipitation patterns in Martinsburg, 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 Martinsburg, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec639286106135103116981101077894
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Martinsburg

In Martinsburg in December, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.

December Average Humidity in Martinsburg

This chart illustrates the average monthly humidity levels in Martinsburg, 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 Martinsburg is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Martinsburg

In Martinsburg 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 Martinsburg, you can check the information here.

Maximum UV Index Levels in Martinsburg for December

The chart shows the monthly maximum UV Index (UVI) for Martinsburg 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 Martinsburg typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Martinsburg 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 Martinsburg Compares to Other Months

Weather in Martinsburg varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Martinsburg, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Martinsburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)63 mm (2.5 inches)86%moderate
February Weather3°C (38°F)92 mm (3.6 inches)86%moderate
March Weather7°C (44°F)86 mm (3.4 inches)86%high
April Weather12°C (55°F)106 mm (4.2 inches)84%very high
May Weather18°C (65°F)135 mm (5.3 inches)78%very high
June Weather23°C (73°F)103 mm (4.0 inches)79%very high
July Weather26°C (79°F)116 mm (4.5 inches)70%very high
August Weather25°C (76°F)98 mm (3.8 inches)59%very high
September Weather21°C (70°F)109 mm (4.3 inches)68%very high
October Weather15°C (60°F)107 mm (4.2 inches)80%high
November Weather7°C (45°F)78 mm (3.1 inches)86%moderate
December Weather3°C (38°F)94 mm (3.7 inches)85%moderate

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