January Weather in Herrin, United States

Last updated: June 24, 2025

In Herrin, United States, the average temperature in January hovers around 2°C (36°F). Temperature extremes can range from a chilling -17°C (1°F) to a surprisingly warm 21°C (71°F). Expect about 98 mm (3.9 in) of precipitation spread over 8 days, and prepare for a high humidity average of 86% that can make the atmosphere feel particularly moist.

January Temperature in Herrin

In January in Herrin, the average temperature is 2°C (36°F), with maximums reaching up to 21°C (71°F) and minimums dropping as low as -17°C (1°F). Visitors should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates January temperature patterns in Herrin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Herrin, January typically has an average temperature of 2°C (36°F), with highs reaching up to 21°C (71°F) and lows dropping to around -17°C (1°F).

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

January Precipitation in Herrin

In Herrin in January, the total precipitation amount is 98 mm (3.9 in), occurring over 8 days.

January Precipitation Trends in Herrin

The chart displays monthly precipitation patterns in Herrin, 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 Herrin, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 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 Herrin

In Herrin in January, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

January Average Humidity in Herrin

This chart illustrates the average monthly humidity levels in Herrin, 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 Herrin is approximately 86%, 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 Herrin

In Herrin 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 Herrin, you can check the information here.

Maximum UV Index Levels in Herrin for January

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

Data source: Herrin 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 Herrin Compares to Other Months

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

This table compares monthly weather conditions in Herrin, 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)	98 mm (3.9 inches)	86%	moderate
February Weather	4°C (39°F)	118 mm (4.7 inches)	84%	moderate
March Weather	10°C (49°F)	141 mm (5.6 inches)	84%	high
April Weather	14°C (57°F)	142 mm (5.6 inches)	80%	very high
May Weather	20°C (69°F)	138 mm (5.4 inches)	82%	extreme
June Weather	25°C (77°F)	108 mm (4.2 inches)	83%	extreme
July Weather	27°C (81°F)	92 mm (3.6 inches)	79%	very high
August Weather	25°C (78°F)	81 mm (3.2 inches)	76%	very high
September Weather	23°C (74°F)	74 mm (2.9 inches)	75%	very high
October Weather	16°C (61°F)	114 mm (4.5 inches)	74%	high
November Weather	8°C (46°F)	94 mm (3.7 inches)	85%	moderate
December Weather	5°C (42°F)	88 mm (3.4 inches)	88%	moderate