January Weather in Ashburn, United States

Last updated: June 24, 2025

In Ashburn, United States, the average temperature in January hovers around 11°C (52°F). However, temperatures can fluctuate dramatically, with minimums reaching as low as -7°C (19°F) and maximums soaring to 28°C (83°F). Expect about 79 mm (3.1 in) of precipitation over 8 days, accompanied by an average humidity level of 85%.

January Temperature in Ashburn

In January in Ashburn, the average temperature is 11°C (52°F), with maximums that can reach 28°C (83°F) and minimums that can drop to -7°C (19°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates January temperature patterns in Ashburn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ashburn, January typically has an average temperature of 11°C (52°F), with highs reaching up to 28°C (83°F) and lows dropping to around -7°C (19°F).

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

January Precipitation in Ashburn

In Ashburn in January, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

January Precipitation Trends in Ashburn

The chart displays monthly precipitation patterns in Ashburn, 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 Ashburn, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 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 Ashburn

In Ashburn 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 Ashburn

This chart illustrates the average monthly humidity levels in Ashburn, 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 Ashburn is approximately 85%, 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 Ashburn

In Ashburn 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 Ashburn.

Maximum UV Index Levels in Ashburn for January

The chart shows the monthly maximum UV Index (UVI) for Ashburn 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 Ashburn typically reaches 5, which falls under the moderate exposure category.

Data source: Ashburn 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 Ashburn Compares to Other Months

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

This table compares monthly weather conditions in Ashburn, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	79 mm (3.1 inches)	85%	moderate
February Weather	14°C (58°F)	115 mm (4.5 inches)	82%	very high
March Weather	17°C (62°F)	86 mm (3.4 inches)	80%	very high
April Weather	19°C (67°F)	104 mm (4.1 inches)	76%	very high
May Weather	24°C (76°F)	81 mm (3.2 inches)	73%	extreme
June Weather	27°C (81°F)	95 mm (3.8 inches)	74%	extreme
July Weather	28°C (83°F)	114 mm (4.5 inches)	80%	extreme
August Weather	28°C (83°F)	108 mm (4.2 inches)	79%	extreme
September Weather	26°C (80°F)	114 mm (4.5 inches)	83%	very high
October Weather	22°C (72°F)	90 mm (3.5 inches)	77%	very high
November Weather	15°C (58°F)	56 mm (2.2 inches)	84%	high
December Weather	12°C (54°F)	119 mm (4.7 inches)	88%	moderate