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January Weather in Rantoul, United States

Last updated: June 24, 2025

In January, the average temperature in Rantoul, United States hovers around -2°C (28°F), with fluctuations ranging from a bone-chilling -28°C (-18°F) to a mild 18°C (64°F). Expect approximately 75 mm (2.9 in) of precipitation spread over 8 days, and prepare for a notable average humidity of 82%.

January Temperature in Rantoul

In January in Rantoul, the average temperature is -2°C (28°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop as low as -28°C (-18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both mild and extreme conditions.

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

The chart illustrates January temperature patterns in Rantoul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rantoul, January typically has an average temperature of -2°C (28°F), with highs reaching up to 18°C (64°F) and lows dropping to around -28°C (-18°F).
JanFebMarAprMayJunJulAugSepOctNovDec283042526474777470574135
Data source: Temperature data for Rantoul 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 Rantoul

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

January Precipitation Trends in Rantoul

The chart displays monthly precipitation patterns in Rantoul, 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 Rantoul, January typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec757411612514511080103801207253
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Rantoul

In Rantoul in January, humidity is 82%. With an average temperature of -2°C (28°F), this humidity feels like an icy shroud enveloping you, making every breath feel crisp and biting as you navigate through a winter wonderland, each step a reminder of the contrast between the cold air and the heavy moisture lingering in the atmosphere.

January Average Humidity in Rantoul

This chart illustrates the average monthly humidity levels in Rantoul, 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 Rantoul is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Rantoul

In Rantoul 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 Rantoul, you can check the information here.

Maximum UV Index Levels in Rantoul for January

The chart shows the monthly maximum UV Index (UVI) for Rantoul 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 Rantoul typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
Data source: Rantoul 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 Rantoul Compares to Other Months

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

This table compares monthly weather conditions in Rantoul, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)75 mm (2.9 inches)82%moderate
February Weather-1°C (31°F)74 mm (2.9 inches)83%moderate
March Weather6°C (42°F)116 mm (4.6 inches)84%high
April Weather11°C (52°F)124 mm (4.9 inches)85%very high
May Weather18°C (65°F)145 mm (5.7 inches)79%very high
June Weather23°C (74°F)110 mm (4.3 inches)82%extreme
July Weather25°C (77°F)80 mm (3.1 inches)80%very high
August Weather23°C (74°F)103 mm (4.0 inches)81%very high
September Weather21°C (70°F)80 mm (3.2 inches)80%very high
October Weather14°C (57°F)120 mm (4.7 inches)82%high
November Weather5°C (41°F)72 mm (2.8 inches)88%moderate
December Weather2°C (35°F)53 mm (2.1 inches)84%low

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