October Weather in Joliet, United States

Last updated: June 24, 2025

In October, the average temperature in Joliet, United States hovers around 6°C (43°F), with fluctuations that can see lows of -21°C (-6°F) and highs reaching up to 28°C (83°F). This month is not just about temperature; expect an average precipitation of 57 mm (2.2 in) spread over 8 days, along with a notable average humidity of 74%. Stay prepared for a mix of conditions!

October Temperature in Joliet

In October in Joliet, the average temperature is 6°C (43°F). Maximum temperatures can reach 28°C (83°F), while minimums may drop as low as -21°C (-6°F). Be sure to pack accordingly, as you can experience a wide range of temperatures during your travels.

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

The chart illustrates October temperature patterns in Joliet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joliet, October typically has an average temperature of 6°C (43°F), with highs reaching up to 28°C (83°F) and lows dropping to around -21°C (-6°F).

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

October Precipitation in Joliet

In Joliet in October, the precipitation amount is 57 mm (2.2 in) over the course of 8 days.

October Precipitation Trends in Joliet

The chart displays monthly precipitation patterns in Joliet, 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 Joliet, October typically receives around 57 mm (2.2 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 Joliet

In Joliet in October, humidity is 74%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that permeates your clothes, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while exploring.

October Average Humidity in Joliet

This chart illustrates the average monthly humidity levels in Joliet, 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 Joliet is approximately 74%, 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 Joliet

In Joliet in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Joliet.

Maximum UV Index Levels in Joliet for October

The chart shows the monthly maximum UV Index (UVI) for Joliet 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 Joliet typically reaches 5, which falls under the moderate exposure category.

Data source: Joliet 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 Joliet Compares to Other Months

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

This table compares monthly weather conditions in Joliet, 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 (25°F)	21 mm (0.8 inches)	85%	moderate
February Weather	-7°C (20°F)	46 mm (1.8 inches)	85%	moderate
March Weather	2°C (35°F)	44 mm (1.7 inches)	79%	high
April Weather	5°C (42°F)	76 mm (3.0 inches)	74%	very high
May Weather	12°C (53°F)	82 mm (3.2 inches)	76%	very high
June Weather	18°C (64°F)	76 mm (3.0 inches)	79%	extreme
July Weather	22°C (72°F)	32 mm (1.3 inches)	81%	very high
August Weather	21°C (69°F)	25 mm (1.0 inches)	80%	very high
September Weather	15°C (60°F)	57 mm (2.2 inches)	76%	very high
October Weather	6°C (43°F)	57 mm (2.2 inches)	74%	moderate
November Weather	1°C (35°F)	34 mm (1.3 inches)	81%	moderate
December Weather	-3°C (28°F)	30 mm (1.2 inches)	87%	low