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October Weather in Janesville, United States

Last updated: June 24, 2025

In October, the average temperature in Janesville, United States hovers around 10°C (50°F). Temperatures can range from a brisk -6°C (22°F) to a pleasant 29°C (85°F). Expect about 34 mm (1.3 in) of precipitation over 3 days, coupled with an average humidity of 67%.

October Temperature in Janesville

In October in Janesville, the average temperature is 10°C (50°F), with maximums reaching up to 29°C (85°F) and minimums dipping to as low as -6°C (22°F). Travelers should be prepared for a wide range of weather conditions, making layers essential for an enjoyable visit.

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 10°C (50°F), with highs reaching up to 29°C (85°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec313236465466747263504030
Data source: Temperature data for Janesville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Janesville

In Janesville in October, the precipitation amount is 34 mm (1.3 in) over the course of 3 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 34 mm (1.3 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec102110854344107819344775
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Janesville

In Janesville in October humidity is 67%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill, making it essential for travelers to layer their clothing and prepare for a rather brisk experience while exploring the surroundings.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%83%72%67%56%42%46%67%86%86%
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 is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111211119743
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)102 mm (4.0 inches)86%moderate
February Weather0°C (32°F)110 mm (4.3 inches)87%moderate
March Weather2°C (37°F)85 mm (3.4 inches)86%very high
April Weather8°C (46°F)43 mm (1.7 inches)83%very high
May Weather12°C (55°F)44 mm (1.7 inches)72%extreme
June Weather19°C (66°F)10 mm (0.4 inches)67%extreme
July Weather23°C (74°F)7 mm (0.3 inches)56%extreme
August Weather22°C (72°F)8 mm (0.3 inches)42%extreme
September Weather17°C (63°F)19 mm (0.7 inches)46%very high
October Weather10°C (50°F)34 mm (1.3 inches)67%high
November Weather4°C (40°F)47 mm (1.8 inches)86%moderate
December Weather-1°C (31°F)75 mm (3.0 inches)86%moderate

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