January Weather in Wheaton, United States

Last updated: June 24, 2025

In January, the average temperature in Wheaton, United States hovers around -10°C (14°F), with potential extremes ranging from a chilling -35°C (-31°F) to a milder 8°C (46°F). During this time, you can expect an average precipitation of 19 mm (0.7 in) spread over 4 days, contributing to an average humidity of 85%. Bundle up and prepare for a brisk and damp month ahead!

January Temperature in Wheaton

In January in Wheaton, the average temperature is -10°C (14°F). Maximum temperatures can reach 8°C (46°F), while minimums can drop as low as -35°C (-31°F). Travelers should be prepared for extremely cold conditions and dress in layers to stay warm.

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

The chart illustrates January temperature patterns in Wheaton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wheaton, January typically has an average temperature of -10°C (14°F), with highs reaching up to 8°C (46°F) and lows dropping to around -35°C (-31°F).

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

January Precipitation in Wheaton

In Wheaton in January, the precipitation amount is 19 mm (0.7 in) over the course of 4 days.

January Precipitation Trends in Wheaton

The chart displays monthly precipitation patterns in Wheaton, 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 Wheaton, January typically receives around 19 mm (0.7 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 Wheaton

In Wheaton in January, humidity is 85%. With an average temperature of -10°C (14°F), this humidity feels like navigating through a cold, damp fog that clings to your skin, making every step outside a challenge as the chill seeps into your bones.

January Average Humidity in Wheaton

This chart illustrates the average monthly humidity levels in Wheaton, 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 Wheaton 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 Wheaton

In Wheaton 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 Wheaton, you can check the information here.

Maximum UV Index Levels in Wheaton for January

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

Data source: Wheaton 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 Wheaton Compares to Other Months

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

This table compares monthly weather conditions in Wheaton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	19 mm (0.7 inches)	85%	moderate
February Weather	-10°C (14°F)	18 mm (0.7 inches)	89%	moderate
March Weather	-1°C (31°F)	37 mm (1.5 inches)	81%	high
April Weather	5°C (41°F)	57 mm (2.3 inches)	82%	high
May Weather	14°C (58°F)	80 mm (3.2 inches)	76%	very high
June Weather	22°C (71°F)	79 mm (3.1 inches)	81%	very high
July Weather	23°C (74°F)	87 mm (3.4 inches)	82%	very high
August Weather	21°C (70°F)	120 mm (4.7 inches)	83%	very high
September Weather	17°C (63°F)	78 mm (3.1 inches)	82%	high
October Weather	8°C (47°F)	79 mm (3.1 inches)	82%	moderate
November Weather	0°C (32°F)	23 mm (0.9 inches)	87%	moderate
December Weather	-5°C (22°F)	36 mm (1.4 inches)	84%	low