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January Weather in Martinsburg, United States

Last updated: June 24, 2025

In Martinsburg, United States, the average temperature in January hovers around 1°C (35°F). You can expect a minimum plunge to -18°C (-1°F), while it can soar to a maximum of 20°C (68°F). During this season, precipitation averages 63 mm (2.5 in) over approximately 8 days, and the average humidity sits at a notable 86%.

January Temperature in Martinsburg

In January in Martinsburg, the average temperature is 1°C (35°F). The maximum can reach 20°C (68°F) and the minimum can be as low as -18°C (-1°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm layers and lighter clothing for the milder days.

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

The chart illustrates January 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, January typically has an average temperature of 1°C (35°F), with highs reaching up to 20°C (68°F) and lows dropping to around -18°C (-1°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.

January Precipitation in Martinsburg

In Martinsburg in January, the precipitation amount is 63 mm (2.5 in) spread over 8 days.

January Precipitation Trends in Martinsburg

The chart displays monthly precipitation patterns in Martinsburg, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Martinsburg, January typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec639286106135103116981101077894
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Martinsburg

In Martinsburg in January, humidity is 86%. With an average temperature of 1°C (35°F), this humidity feels like a biting chill that wraps around you, making outdoor exploration uncomfortable and requiring extra layers to stay warm while navigating the damp air.

January Average Humidity in Martinsburg

This chart illustrates the average monthly humidity levels in Martinsburg, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Martinsburg is approximately 86%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in Martinsburg

In Martinsburg in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Martinsburg in January, 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 January, the maximum UV index in Martinsburg typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Martinsburg January 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 January 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 January’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 January’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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