January Weather in Collinsville, United States

Last updated: June 24, 2025

In January, the average temperature in Collinsville, United States hovers around 4°C (39°F). Be prepared for a wide range of temperatures, with a chilly minimum of -15°C (5°F) and an occasional warm maximum reaching 24°C (75°F). You'll likely encounter 77 mm (3.0 in) of precipitation over 6 days, while the air carries an average humidity of 77%.

January Temperature in Collinsville

In January in Collinsville, the average temperature is 4°C (39°F). Maximum temperatures can reach 24°C (75°F), while the minimum can drop as low as -15°C (5°F). Be prepared for a wide range of temperatures when traveling to Collinsville during this time!

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

The chart illustrates January temperature patterns in Collinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collinsville, January typically has an average temperature of 4°C (39°F), with highs reaching up to 24°C (75°F) and lows dropping to around -15°C (5°F).

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

January Precipitation in Collinsville

In Collinsville in January, the total precipitation amount is 77 mm (3.0 in) occurring over a span of 6 days.

January Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, 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 Collinsville, January typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 6 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 Collinsville

In Collinsville in January, humidity is 77%. With an average temperature of 4°C (39°F), this humidity feels like a brisk chill that seeps into your bones, making travel feel invigorating yet uncomfortable without proper layers to stay warm and dry.

January Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, 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 Collinsville is approximately 77%, 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 Collinsville

In Collinsville 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 Collinsville, you can check the information here.

Maximum UV Index Levels in Collinsville for January

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

Data source: Collinsville 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 Collinsville Compares to Other Months

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

This table compares monthly weather conditions in Collinsville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	77 mm (3.0 inches)	77%	moderate
February Weather	5°C (41°F)	69 mm (2.7 inches)	76%	high
March Weather	12°C (54°F)	116 mm (4.6 inches)	71%	high
April Weather	15°C (60°F)	148 mm (5.8 inches)	73%	very high
May Weather	21°C (70°F)	198 mm (7.8 inches)	83%	very high
June Weather	26°C (79°F)	104 mm (4.1 inches)	83%	extreme
July Weather	28°C (83°F)	94 mm (3.7 inches)	81%	extreme
August Weather	27°C (81°F)	120 mm (4.7 inches)	73%	very high
September Weather	24°C (76°F)	87 mm (3.4 inches)	67%	very high
October Weather	17°C (62°F)	141 mm (5.6 inches)	72%	high
November Weather	10°C (50°F)	51 mm (2.0 inches)	82%	moderate
December Weather	7°C (44°F)	49 mm (1.9 inches)	85%	moderate