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

Fire Weather Concerns West; Thunderstorms in the Upper Midwest

Dry and breezy conditions will enhance fire weather concerns across portions of the northern and central High Plains through Saturday, where fuels remain largely receptive. Severe thunderstorms are possible across portions of central Nebraska to the Upper Midwest this Friday afternoon into tonight. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

55°F

13°C

Humidity 100%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Sep 2:15 am CDT
Extended Forecast for

Roscoe IL

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 80. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 60. South southeast wind around 5 mph, with gusts as high as 15 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 83. South wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. North wind around 5 mph, with gusts as high as 10 mph.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 79.

    High: 79 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Breezy.

    Low: 63 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 56. Calm wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 80. Light and variable wind becoming south 5 to 10 mph in the morning.
Friday Night
Increasing clouds, with a low around 60. South southeast wind around 5 mph, with gusts as high as 15 mph.
Saturday
Mostly sunny, with a high near 83. South wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 53. North wind around 5 mph, with gusts as high as 10 mph.
Sunday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 79.
Monday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Breezy.
Tuesday
A chance of showers. Mostly cloudy, with a high near 77.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 54.
Wednesday
A chance of showers. Mostly cloudy, with a high near 74.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 56.
Thursday
A chance of showers. Partly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 89.02°W
Last Update:
1:21 am CDT Sep 11, 2026
Forecast Valid:
2am CDT Sep 11, 2026-6pm CDT Sep 17, 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