January Weather in Rockford, United States

Last updated: June 24, 2025

In January, the average temperature in Rockford, United States hovers around -2°C (29°F), with lows dipping to a brisk -25°C (-13°F) and highs reaching a milder 18°C (65°F). Expect about 75 mm (2.9 in) of precipitation spread over 8 days, and a notable average humidity of 88%. Stay prepared for chilly conditions!

January Temperature in Rockford

In January in Rockford, the average temperature is -2°C (29°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -25°C (-13°F). It's essential to pack accordingly for unpredictable weather when traveling during this time.

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

The chart illustrates January temperature patterns in Rockford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rockford, January typically has an average temperature of -2°C (29°F), with highs reaching up to 18°C (65°F) and lows dropping to around -25°C (-13°F).

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

January Precipitation in Rockford

In Rockford in January, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.

January Precipitation Trends in Rockford

The chart displays monthly precipitation patterns in Rockford, 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 Rockford, January typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Rockford

In Rockford in January, humidity is 88%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill in the air that penetrates layers of clothing, making outdoor activities challenging and potentially uncomfortable for travelers.

January Average Humidity in Rockford

This chart illustrates the average monthly humidity levels in Rockford, 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 Rockford is approximately 88%, 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 Rockford

In Rockford 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 Rockford, you can check the information here.

Maximum UV Index Levels in Rockford for January

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

Data source: Rockford 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 Rockford Compares to Other Months

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

This table compares monthly weather conditions in Rockford, 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 (29°F)	75 mm (2.9 inches)	88%	moderate
February Weather	0°C (32°F)	84 mm (3.3 inches)	87%	moderate
March Weather	5°C (41°F)	100 mm (3.9 inches)	87%	high
April Weather	10°C (51°F)	92 mm (3.6 inches)	87%	very high
May Weather	17°C (63°F)	128 mm (5.1 inches)	81%	very high
June Weather	22°C (73°F)	123 mm (4.9 inches)	82%	very high
July Weather	24°C (76°F)	109 mm (4.3 inches)	81%	very high
August Weather	23°C (74°F)	103 mm (4.0 inches)	78%	very high
September Weather	20°C (69°F)	70 mm (2.8 inches)	78%	very high
October Weather	14°C (57°F)	93 mm (3.7 inches)	82%	high
November Weather	5°C (42°F)	83 mm (3.3 inches)	89%	moderate
December Weather	2°C (35°F)	64 mm (2.5 inches)	86%	low