January Weather in De Kalb, United States

Last updated: June 24, 2025

In January, the average temperature in De Kalb, United States hovers around 8°C (46°F). However, be prepared for a wide range, as temperatures can dip to a chilly -14°C (7°F) or rise to a pleasant 25°C (77°F). Expect 104 mm (4.1 in) of precipitation spread across about 10 days, accompanied by an average humidity of 82%.

January Temperature in De Kalb

In January in De Kalb, the average temperature is 8°C (46°F). Maximum temperatures can reach 25°C (77°F), while minimum temperatures can drop as low as -14°C (7°F). Travelers should be prepared for a wide range of weather conditions during this time, making layering essential for outdoor activities.

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 8°C (46°F), with highs reaching up to 25°C (77°F) and lows dropping to around -14°C (7°F).

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

January Precipitation in De Kalb

In De Kalb in January, the precipitation amount is 104 mm (4.1 in) over a period of 10 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 104 mm (4.1 inches) of precipitation spread over approximately 10 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 De Kalb

In De Kalb in January humidity is 82%. With an average temperature of 8°C (46°F), this humidity feels like a thick, damp blanket wrapping around you, making travel uncomfortable and creating a sense of heaviness in the air that can sap your energy quickly.

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 82%, 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 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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	104 mm (4.1 inches)	82%	moderate
February Weather	9°C (49°F)	151 mm (6.0 inches)	80%	high
March Weather	15°C (59°F)	134 mm (5.3 inches)	78%	very high
April Weather	17°C (63°F)	217 mm (8.5 inches)	79%	very high
May Weather	23°C (73°F)	172 mm (6.8 inches)	81%	extreme
June Weather	27°C (80°F)	105 mm (4.1 inches)	77%	extreme
July Weather	28°C (83°F)	77 mm (3.0 inches)	72%	extreme
August Weather	28°C (83°F)	93 mm (3.7 inches)	65%	extreme
September Weather	26°C (78°F)	80 mm (3.1 inches)	63%	very high
October Weather	19°C (67°F)	120 mm (4.7 inches)	70%	very high
November Weather	13°C (55°F)	68 mm (2.7 inches)	82%	high
December Weather	10°C (50°F)	127 mm (5.0 inches)	88%	moderate