January Weather in De Kalb, United States

Last updated: June 24, 2025

In De Kalb, United States, the average temperature in January hovers around 9°C (48°F), creating a cool climate. Expect a range that swings from a chilly -13°C (9°F) at its lowest to a mild 27°C (81°F) at its peak. During this month, precipitation averages 105 mm (4.1 in) spread across approximately 8 days, accompanied by an average humidity of 85%. Whether you’re looking to embrace the brisk air or prepare for the occasional shower, be ready for a diverse weather experience!

January Temperature in De Kalb

In January in De Kalb, the average temperature is 9°C (48°F), with maximums reaching 27°C (81°F) and minimums dropping as low as -13°C (9°F). This wide temperature range means travelers should be prepared for both warm and cold conditions during their visit.

January Weather in De Kalb: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in De Kalb, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In De Kalb, January typically has an average temperature of 9°C (48°F), with highs reaching up to 27°C (81°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec485360647379818177685451
Data source: Temperature data for De Kalb 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 De Kalb

In De Kalb in January, the precipitation amount is 105 mm (4.1 in) over the course of 8 days.

January Precipitation Trends in De Kalb

The chart displays monthly precipitation patterns in De Kalb, 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 De Kalb, January typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1051601201481201671091299710966120
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in De Kalb

In De Kalb in January humidity is 85%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.

January Average Humidity in De Kalb

This chart illustrates the average monthly humidity levels in De Kalb, 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 De Kalb is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in De Kalb

In De Kalb in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in De Kalb for better planning.

Maximum UV Index Levels in De Kalb for January

The chart shows the monthly maximum UV Index (UVI) for De Kalb 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 De Kalb typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: De Kalb 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 De Kalb Compares to Other Months

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

This table compares monthly weather conditions in De Kalb, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)105 mm (4.1 inches)85%moderate
February Weather12°C (53°F)160 mm (6.3 inches)84%high
March Weather15°C (60°F)120 mm (4.7 inches)82%very high
April Weather18°C (65°F)148 mm (5.8 inches)82%very high
May Weather23°C (74°F)120 mm (4.7 inches)82%extreme
June Weather26°C (79°F)167 mm (6.6 inches)79%extreme
July Weather27°C (81°F)109 mm (4.3 inches)82%extreme
August Weather27°C (81°F)129 mm (5.1 inches)77%extreme
September Weather25°C (78°F)97 mm (3.8 inches)74%very high
October Weather20°C (69°F)109 mm (4.3 inches)73%very high
November Weather12°C (55°F)66 mm (2.6 inches)85%high
December Weather11°C (51°F)120 mm (4.7 inches)88%moderate

Compare De Kalb's Climate with Cities Worldwide