January Weather in Falls Church, United States

Last updated: June 24, 2025

In Falls Church, United States, the average temperature in January hovers around 2°C (37°F). However, be prepared for a wide range, as temperatures can drop to a chilly -15°C (6°F) or soar to a comfortable 21°C (70°F). Rainfall is not uncommon, with 60 mm (2.4 in) expected over about 7 days, contributing to an average humidity of 84%. Dress warmly and stay prepared for the wet weather!

January Temperature in Falls Church

In January in Falls Church, the average temperature is 2°C (37°F). Maximums can reach 21°C (70°F) and minimums can be as low as -15°C (6°F). Be prepared for a wide range of temperatures when traveling, so pack accordingly!

January Weather in Falls Church: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Falls Church, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Falls Church, January typically has an average temperature of 2°C (37°F), with highs reaching up to 21°C (70°F) and lows dropping to around -15°C (6°F).

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

January Precipitation in Falls Church

In Falls Church in January, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

January Precipitation Trends in Falls Church

The chart displays monthly precipitation patterns in Falls Church, 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 Falls Church, January typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 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 Falls Church

In Falls Church in January, humidity is 84%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for layered clothing to stay warm and dry.

January Average Humidity in Falls Church

This chart illustrates the average monthly humidity levels in Falls Church, 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 Falls Church is approximately 84%, 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 Falls Church

In Falls Church 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 Falls Church, you can check the information here.

Maximum UV Index Levels in Falls Church for January

The chart shows the monthly maximum UV Index (UVI) for Falls Church 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 Falls Church typically reaches 3, which falls under the moderate exposure category.

Data source: Falls Church 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 Falls Church Compares to Other Months

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

This table compares monthly weather conditions in Falls Church, 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 (37°F)	60 mm (2.4 inches)	84%	moderate
February Weather	5°C (41°F)	98 mm (3.9 inches)	83%	moderate
March Weather	8°C (46°F)	84 mm (3.3 inches)	83%	high
April Weather	13°C (57°F)	99 mm (3.9 inches)	81%	very high
May Weather	19°C (66°F)	132 mm (5.2 inches)	78%	very high
June Weather	24°C (75°F)	118 mm (4.7 inches)	79%	very high
July Weather	27°C (81°F)	141 mm (5.5 inches)	74%	very high
August Weather	25°C (77°F)	150 mm (5.9 inches)	72%	very high
September Weather	22°C (72°F)	102 mm (4.0 inches)	75%	very high
October Weather	16°C (62°F)	107 mm (4.2 inches)	81%	high
November Weather	8°C (47°F)	86 mm (3.4 inches)	85%	moderate
December Weather	5°C (41°F)	94 mm (3.7 inches)	84%	moderate