October Weather in Janesville, United States

Last updated: June 24, 2025

In Janesville, United States, the average temperature in October hovers around 9°C (49°F), with a minimum dip to -10°C (15°F) and soaring to a maximum of 30°C (87°F). Expect approximately 93 mm (3.7 in) of precipitation spread over 10 days, contributing to an average humidity of 80%. This blend of conditions makes October a unique time to experience the local weather!

October Temperature in Janesville

In October in Janesville, the average temperature is 9°C (49°F). Maximums can reach 30°C (87°F) and minimums can be as low as -10°C (15°F). Be prepared for a wide range of temperatures while traveling, so pack accordingly!

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

The chart illustrates October temperature patterns in Janesville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Janesville, October typically has an average temperature of 9°C (49°F), with highs reaching up to 30°C (87°F) and lows dropping to around -10°C (15°F).

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

October Precipitation in Janesville

In Janesville in October, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

October Precipitation Trends in Janesville

The chart displays monthly precipitation patterns in Janesville, 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 Janesville, October typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Janesville

In Janesville in October, humidity is 80%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting a need for layered clothing to stay comfortable while traveling.

October Average Humidity in Janesville

This chart illustrates the average monthly humidity levels in Janesville, 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 Janesville is approximately 80%, 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 Janesville

In Janesville 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 Janesville.

Maximum UV Index Levels in Janesville for October

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

Data source: Janesville 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 Janesville Compares to Other Months

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

This table compares monthly weather conditions in Janesville, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	34 mm (1.3 inches)	82%	moderate
February Weather	-9°C (17°F)	41 mm (1.6 inches)	84%	moderate
March Weather	1°C (34°F)	68 mm (2.7 inches)	80%	moderate
April Weather	7°C (45°F)	91 mm (3.6 inches)	81%	very high
May Weather	15°C (60°F)	140 mm (5.5 inches)	74%	very high
June Weather	22°C (72°F)	118 mm (4.7 inches)	80%	very high
July Weather	23°C (74°F)	103 mm (4.1 inches)	80%	very high
August Weather	21°C (71°F)	119 mm (4.7 inches)	77%	very high
September Weather	18°C (65°F)	137 mm (5.4 inches)	75%	very high
October Weather	9°C (49°F)	93 mm (3.7 inches)	80%	moderate
November Weather	1°C (35°F)	36 mm (1.4 inches)	87%	moderate
December Weather	-4°C (25°F)	44 mm (1.7 inches)	83%	moderate