January Weather in Arlington, United States

Last updated: June 24, 2025

In January, the average temperature in Arlington, United States hovers around 2°C (36°F). Expect chilly conditions with a minimum temperature that can plunge to -17°C (2°F), while maximums can reach up to 14°C (58°F). You might also experience precipitation of about 48 mm (1.9 in) spread over 11 days, and a high average humidity of 86% keeps the air feeling quite damp.

January Temperature in Arlington

In January in Arlington, the average temperature is 2°C (36°F). Maximums can reach 14°C (58°F), and minimums can be as low as -17°C (2°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.

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 2°C (36°F), with highs reaching up to 14°C (58°F) and lows dropping to around -17°C (2°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 precipitation amount is 48 mm (1.9 in) over a span of 11 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 48 mm (1.9 inches) of precipitation spread over approximately 11 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 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

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 86%, 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 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.

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	2°C (36°F)	48 mm (1.9 inches)	86%	low
February Weather	3°C (37°F)	58 mm (2.3 inches)	87%	moderate
March Weather	7°C (45°F)	31 mm (1.2 inches)	86%	moderate
April Weather	11°C (52°F)	30 mm (1.2 inches)	85%	high
May Weather	16°C (62°F)	18 mm (0.7 inches)	80%	very high
June Weather	21°C (69°F)	8 mm (0.3 inches)	82%	very high
July Weather	25°C (77°F)	1 mm (0.0 inches)	78%	very high
August Weather	25°C (77°F)	4 mm (0.2 inches)	62%	very high
September Weather	19°C (67°F)	12 mm (0.5 inches)	59%	very high
October Weather	11°C (53°F)	28 mm (1.1 inches)	78%	moderate
November Weather	6°C (43°F)	40 mm (1.6 inches)	88%	moderate
December Weather	2°C (36°F)	51 mm (2.0 inches)	88%	low