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January Weather in Arlington, United States

Last updated: June 24, 2025

In January, the average temperature in Arlington, United States hovers around 3°C (37°F). Expect chilly conditions with minimum temperatures dipping to -17°C (2°F) and highs reaching up to 14°C (57°F). Prepare for the possibility of 314 mm (12.4 in) of precipitation spread over 16 days, and with an average humidity of 87%, it's a notably damp time of year.

January Temperature in Arlington

In January in Arlington, the average temperature is 3°C (37°F). The maximum can reach 14°C (57°F), while the minimum can drop to as low as -17°C (2°F). Be sure to pack warm clothing and be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates January temperature patterns in Arlington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arlington, January typically has an average temperature of 3°C (37°F), with highs reaching up to 14°C (57°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec373541475459636458474136
Data source: Temperature data for Arlington 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 Arlington

In Arlington in January, the precipitation amount is 314 mm (12.4 in) spread over a duration of 16 days.

January Precipitation Trends in Arlington

The chart displays monthly precipitation patterns in Arlington, 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 Arlington, January typically receives around 314 mm (12.4 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec3143252562141131043738175302404365
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Arlington

In Arlington in January, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.

January Average Humidity in Arlington

This chart illustrates the average monthly humidity levels in Arlington, 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 Arlington is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%88%86%82%82%85%77%76%88%88%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Arlington

In Arlington in January, 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 Arlington, you can visit Hourly UV Index in Arlington.

Maximum UV Index Levels in Arlington for January

The chart shows the monthly maximum UV Index (UVI) for Arlington 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 Arlington typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987531
Data source: Arlington 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 Arlington Compares to Other Months

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

This table compares monthly weather conditions in Arlington, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)314 mm (12.4 inches)87%low
February Weather2°C (36°F)325 mm (12.8 inches)86%moderate
March Weather5°C (41°F)256 mm (10.1 inches)88%moderate
April Weather8°C (47°F)214 mm (8.4 inches)86%high
May Weather12°C (54°F)113 mm (4.4 inches)82%very high
June Weather15°C (59°F)104 mm (4.1 inches)82%very high
July Weather17°C (63°F)37 mm (1.5 inches)85%very high
August Weather18°C (64°F)38 mm (1.5 inches)77%very high
September Weather14°C (58°F)175 mm (6.9 inches)76%high
October Weather8°C (47°F)302 mm (11.9 inches)88%moderate
November Weather5°C (42°F)404 mm (15.9 inches)88%moderate
December Weather2°C (37°F)365 mm (14.4 inches)89%low

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