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Janesville, WI Weather Forecast

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Janesville, WI Weather Forecast

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Janesville WI weather - Clear - 37°F
Clear
37°F
Updated 5:36 am
Feels Like 34°F
Humidity 80%
Wind SSW 8 mph
Barometer  30.4 in
Dew Point 32°F
Janesville WI weather - Clear - 3°C
Clear
3°C
Updated 5:36 am
Feels Like 1°C
Humidity 80%
Wind SSW 13 km/h
Barometer  102.9 kPa
Dew Point 0°C
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Janesville Weather Forecast

EARLY THIS MORNING TODAY TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Janesville, WI Weather - Early This Morning Clear Janesville, WI Weather - Today Sunny Janesville, WI Weather - Tonight Clear Janesville, WI Weather - Monday Sunny Janesville, WI Weather - Monday Night Mostly Clear Janesville, WI Weather - Tuesday Sunny Janesville, WI Weather - Tuesday Night Clear Janesville, WI Weather - Wednesday Sunny Janesville, WI Weather - Wednesday Night Mostly Clear Janesville, WI Weather - Thursday Sunny Janesville, WI Weather - Thursday Night Mostly Clear Janesville, WI Weather - Friday Sunny
Clear Sunny Clear Sunny Mostly Clear Sunny Clear Sunny Mostly Clear Sunny Mostly Clear Sunny
Hi: 61°FHi: 16°C
 Lo: 39°FLo: 4°C Hi: 65°FHi: 18°C
 Lo: 39°FLo: 4°C Hi: 69°FHi: 21°C
 Lo: 41°FLo: 5°C Hi: 69°FHi: 21°C
 Lo: 49°FLo: 9°C Hi: 71°FHi: 22°C
 Lo: 49°FLo: 9°C Hi: 71°FHi: 22°C
POP = Probability of Precipitation.
Weather Outlook Updated: 430 AM CDT Sun Oct 18 2026 Janesville, WI Weather - WeatherWorld.com

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Issued: 1213 AM CDT Sun Oct 18 2026

Key Messages

  • Southwest gales are forecast today into tonight over the northern half of Lake Michigan and Gale Warnings are in effect. A Small Craft Advisory is in effect north of Port Washington into tonight, and for the rest of the southern Wisconsin nearshore waters after sunrise through this evening.
  • Dry with a gradual warming trend through next weekend.

Aviation

... Issued 1213 AM CDT Sun Oct 18 2026

VFR conditions expected throughout the TAF period, with mainly clear skies. Southwesterly steady...