October Weather in Collinsville, United States

Last updated: June 24, 2025

In October, the average temperature in Collinsville, United States hovers around 16°C (62°F). Expect a range where the minimum can dip to -1°C (31°F), while the maximum can soar up to 35°C (95°F). This month also brings about 121 mm (4.8 in) of precipitation over 8 days, contributing to an average humidity of 78%. Stay prepared for a mix of climate conditions!

October Temperature in Collinsville

In October in Collinsville, the average temperature is 16°C (62°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as -1°C (31°F). It's important to pack accordingly to enjoy a comfortable and pleasant trip to Collinsville.

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

The chart illustrates October 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, October typically has an average temperature of 16°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (31°F).

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

October Precipitation in Collinsville

In Collinsville in October, the precipitation amount is 121 mm (4.8 in) over the course of 8 days.

October Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Collinsville, October typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Collinsville

In Collinsville in October, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.

October Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Collinsville is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Collinsville

In Collinsville in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Collinsville.

Maximum UV Index Levels in Collinsville for October

The chart shows the monthly maximum UV Index (UVI) for Collinsville in October, 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 October, the maximum UV index in Collinsville typically reaches 8, which falls under the very high exposure category.

Data source: Collinsville October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	75 mm (3.0 inches)	87%	moderate
February Weather	7°C (45°F)	110 mm (4.4 inches)	87%	high
March Weather	10°C (50°F)	74 mm (2.9 inches)	86%	very high
April Weather	15°C (59°F)	141 mm (5.6 inches)	84%	very high
May Weather	19°C (67°F)	141 mm (5.6 inches)	83%	very high
June Weather	23°C (74°F)	98 mm (3.9 inches)	83%	extreme
July Weather	26°C (78°F)	72 mm (2.8 inches)	79%	very high
August Weather	24°C (76°F)	108 mm (4.3 inches)	66%	very high
September Weather	22°C (71°F)	133 mm (5.3 inches)	68%	very high
October Weather	16°C (62°F)	121 mm (4.8 inches)	78%	very high
November Weather	9°C (48°F)	79 mm (3.1 inches)	89%	moderate
December Weather	6°C (43°F)	105 mm (4.2 inches)	86%	moderate