National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

63°F

17°C

Humidity 77%
Wind Speed NE 13 mph
Barometer 30.12 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 14 Oct 1:45 pm CDT
Extended Forecast for

Roscoe IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 64. East northeast wind around 10 mph.

    High: 64 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers. High near 58. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 2am. Low around 46. Breezy, with a north northeast wind 5 to 10 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    Low: 46 °F

    Showers and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers, mainly after 7am. Mostly cloudy, with a high near 53. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.

    High: 53 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Breezy.

    Low: 32 °F

    Partly Cloudy
    and Breezy
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 57.

    High: 57 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 64. East northeast wind around 10 mph.
Tonight
Mostly cloudy, with a low around 51. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
Showers. High near 58. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 2am. Low around 46. Breezy, with a north northeast wind 5 to 10 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Friday
A 50 percent chance of showers, mainly after 7am. Mostly cloudy, with a high near 53. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.
Friday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Breezy.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 57.
Saturday Night
Clear, with a low around 36.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 89.02°W
Last Update:
1:26 pm CDT Oct 14, 2026
Forecast Valid:
2pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation