Janesville 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Janesville 7-day weather forecast

Stacker created the forecast for Janesville, Wisconsin using data from OpenWeather. This week's high is 78 °F on Sunday, while the low is 38 °F on Thursday. There are expected to be 2 sunny days and rain on 4 days this week.

NWS Milwaukee/Sullivan WI has issued a frost advisory until Monday at 08:00 AM.

Monday, May 11

- High of 60 °F, low of 39 °F (47% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (7 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 5:38 AM, sunset at 8:06 PM
1 / 6
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Tuesday, May 12

- High of 70 °F, low of 39 °F (74% humidity)
- Overcast with a 100% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Fresh breeze (23 mph wind)
- Sunrise at 5:36 AM, sunset at 8:08 PM
2 / 6
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Wednesday, May 13

- High of 54 °F, low of 42 °F (67% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 5:35 AM, sunset at 8:09 PM
3 / 6
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Thursday, May 14

- High of 62 °F, low of 38 °F (50% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (7 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:34 AM, sunset at 8:10 PM
4 / 6
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Friday, May 15

- High of 74 °F, low of 44 °F (62% humidity)
- Overcast with a 82% chance of rain (0 mm of rain)
- Fresh breeze (23 mph wind)
- Sunrise at 5:33 AM, sunset at 8:11 PM
5 / 6
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Saturday, May 16

- High of 74 °F, low of 55 °F (80% humidity)
- Overcast with a 100% chance of rain (9 mm of rain)
- Moderate breeze (14 mph wind)
- Sunrise at 5:32 AM, sunset at 8:12 PM
- New moon
6 / 6
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Sunday, May 17

- High of 78 °F, low of 52 °F (70% humidity)
- Mostly cloudy with a 100% chance of rain (3 mm of rain)
- Gentle breeze (12 mph wind)
- Sunrise at 5:31 AM, sunset at 8:13 PM

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