January Weather in Carterville, United States

Last updated: June 24, 2025

In January, the average temperature in Carterville, United States hovers around 2°C (36°F). However, be prepared for a wide range of temperatures, as the minimum can drop to -18°C (-1°F), while the maximum can reach up to 21°C (70°F). This month sees approximately 74 mm (2.9 in) of precipitation spread over 7 days, coupled with an average humidity of 81%. Dress accordingly to embrace the diverse weather!

January Temperature in Carterville

In January in Carterville, the average temperature is 2°C (36°F). Maximums can reach 21°C (70°F), while minimums can drop to as low as -18°C (-1°F). It's essential to pack for a wide range of temperatures to ensure you're prepared for the changing weather during your travels.

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

The chart illustrates January temperature patterns in Carterville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carterville, January typically has an average temperature of 2°C (36°F), with highs reaching up to 21°C (70°F) and lows dropping to around -18°C (-1°F).

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

January Precipitation in Carterville

In Carterville in January, the precipitation amount is 74 mm (2.9 in) over a period of 7 days.

January Precipitation Trends in Carterville

The chart displays monthly precipitation patterns in Carterville, 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 Carterville, January typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 7 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 Carterville

In Carterville in January humidity is 81%. With an average temperature of 2°C (36°F), this humidity feels like a chilly dampness that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm and dry.

January Average Humidity in Carterville

This chart illustrates the average monthly humidity levels in Carterville, 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 Carterville is approximately 81%, 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 Carterville

In Carterville 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 Carterville, you can check the information here.

Maximum UV Index Levels in Carterville for January

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

Data source: Carterville 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 Carterville Compares to Other Months

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

This table compares monthly weather conditions in Carterville, 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 (36°F)	74 mm (2.9 inches)	81%	moderate
February Weather	3°C (38°F)	64 mm (2.5 inches)	78%	high
March Weather	10°C (51°F)	136 mm (5.4 inches)	76%	high
April Weather	14°C (57°F)	131 mm (5.2 inches)	78%	very high
May Weather	20°C (68°F)	186 mm (7.3 inches)	83%	very high
June Weather	25°C (78°F)	87 mm (3.4 inches)	83%	extreme
July Weather	27°C (81°F)	93 mm (3.7 inches)	78%	extreme
August Weather	26°C (78°F)	110 mm (4.3 inches)	68%	very high
September Weather	23°C (74°F)	80 mm (3.2 inches)	64%	very high
October Weather	15°C (60°F)	129 mm (5.1 inches)	70%	high
November Weather	9°C (48°F)	54 mm (2.1 inches)	83%	moderate
December Weather	6°C (42°F)	46 mm (1.8 inches)	87%	moderate