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January Weather in Rockford, United States

Last updated: June 24, 2025

In January, the average temperature in Rockford, United States hovers around -4°C (26°F), with extremes ranging from a brisk -25°C (-13°F) to a mild 15°C (59°F). This period sees an average precipitation of 64 mm (2.5 in) over 10 days, contributing to a notably high average humidity of 87%. Prepare accordingly for the chilly, damp weather!

January Temperature in Rockford

In January in Rockford, the average temperature is -4°C (26°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -25°C (-13°F). Be sure to pack warm clothing and prepare for a range of temperatures if you're planning to travel during this month.

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 -4°C (26°F), with highs reaching up to 15°C (59°F) and lows dropping to around -25°C (-13°F).
JanFebMarAprMayJunJulAugSepOctNovDec262736465970757265533832
Data source: Temperature data for Rockford generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Rockford

In Rockford in January, the precipitation amount is 64 mm (2.5 in) over a span of 10 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 64 mm (2.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6469688713912470781151326367
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Rockford

In Rockford in January humidity is 87%. With average temperature -4°C (26°F), this humidity feels like an icy blanket enveloping you, making outdoor activities challenging and rendering those brisk air moments difficult to bear, as the cold moisture seeps into your clothing and chills you to the bone.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
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 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 Rockford, you can visit Hourly UV Index in Rockford.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)64 mm (2.5 inches)87%low
February Weather-3°C (27°F)69 mm (2.7 inches)87%moderate
March Weather2°C (37°F)67 mm (2.7 inches)86%moderate
April Weather8°C (47°F)87 mm (3.4 inches)87%very high
May Weather15°C (60°F)139 mm (5.5 inches)82%very high
June Weather21°C (70°F)124 mm (4.9 inches)81%very high
July Weather24°C (75°F)70 mm (2.7 inches)78%very high
August Weather22°C (72°F)78 mm (3.1 inches)79%very high
September Weather18°C (65°F)115 mm (4.5 inches)79%high
October Weather11°C (53°F)132 mm (5.2 inches)82%moderate
November Weather3°C (38°F)63 mm (2.5 inches)87%moderate
December Weather0°C (32°F)67 mm (2.7 inches)86%low

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