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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 11°C (52°F). Expect quite a range, as temperatures can dip as low as -7°C (20°F) and soar up to 27°C (82°F). Be prepared for some rain, with an average precipitation of 88 mm (3.5 in) over 8 days and a notable 85% humidity.

January Temperature in Arlington

In January in Arlington, the average temperature is 11°C (52°F), with maximums reaching up to 27°C (82°F) and minimums dropping as low as -7°C (20°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 11°C (52°F), with highs reaching up to 27°C (82°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec515762677580828279725854
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 88 mm (3.5 in) over the course of 8 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 88 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8811485113891031191231159849125
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 85%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel quite uncomfortable as the air feels heavy and can sap your energy.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111111110864
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 Weather11°C (52°F)88 mm (3.5 inches)85%moderate
February Weather14°C (58°F)114 mm (4.5 inches)82%very high
March Weather17°C (62°F)85 mm (3.3 inches)80%very high
April Weather19°C (67°F)113 mm (4.4 inches)76%very high
May Weather24°C (75°F)89 mm (3.5 inches)73%extreme
June Weather26°C (80°F)103 mm (4.0 inches)74%extreme
July Weather28°C (82°F)119 mm (4.7 inches)80%extreme
August Weather28°C (82°F)123 mm (4.8 inches)79%extreme
September Weather26°C (79°F)115 mm (4.5 inches)83%very high
October Weather22°C (72°F)98 mm (3.9 inches)77%very high
November Weather15°C (59°F)49 mm (1.9 inches)84%high
December Weather12°C (54°F)125 mm (4.9 inches)88%moderate

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