January Weather in Arlington, United States

Last updated: June 24, 2025

In January, the average temperature in Arlington, United States hovers around -4°C (25°F). Temperatures can fluctuate significantly, dipping as low as -31°C (-24°F) and rising to a maximum of 13°C (56°F). During this month, expect about 32 mm (1.2 in) of precipitation spread over 4 days, with an average humidity of 76%. Stay warm and prepared for varied weather conditions!

January Temperature in Arlington

In January in Arlington, the average temperature is -4°C (25°F), with maximums reaching 13°C (56°F) and minimums dropping to as low as -31°C (-24°F). It's essential to prepare for a wide range of temperatures while 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 -4°C (25°F), with highs reaching up to 13°C (56°F) and lows dropping to around -31°C (-24°F).

Data source: Temperature data for Arlington generated using information from the Copernicus Climate Change Service.

January Precipitation in Arlington

In Arlington in January, the total precipitation amount is 32 mm (1.2 in) over a span of 4 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 32 mm (1.2 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Arlington

In Arlington in January humidity is 76%. With an average temperature of -4°C (25°F), this humidity feels like a chilling mist that clings to your skin, making every breath feel heavy and damp, which can be quite uncomfortable for traveling.

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 76%, offering insight into how humid the weather typically is during this month.

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 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 Arlington, you can check the information here.

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 3, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	32 mm (1.2 inches)	76%	moderate
February Weather	-4°C (25°F)	30 mm (1.2 inches)	80%	moderate
March Weather	5°C (41°F)	92 mm (3.6 inches)	73%	high
April Weather	10°C (50°F)	59 mm (2.3 inches)	74%	very high
May Weather	17°C (63°F)	151 mm (6.0 inches)	78%	very high
June Weather	24°C (76°F)	123 mm (4.8 inches)	82%	very high
July Weather	25°C (78°F)	68 mm (2.7 inches)	83%	very high
August Weather	23°C (74°F)	103 mm (4.1 inches)	80%	very high
September Weather	21°C (69°F)	79 mm (3.1 inches)	75%	very high
October Weather	11°C (53°F)	105 mm (4.1 inches)	75%	high
November Weather	4°C (40°F)	30 mm (1.2 inches)	82%	moderate
December Weather	-1°C (31°F)	41 mm (1.6 inches)	83%	low