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

Hazardous Weather Conditions

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fair

59°F

15°C

Humidity 24%
Wind Speed S 8 mph
Barometer 30.19 in (1022.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 20 Apr 4:56 pm CDT
Extended Forecast for

Walnut IL

  • Tonight

    Tonight: Partly cloudy, with a low around 47. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56. West wind 5 to 10 mph.

    Low: 56 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. West wind around 5 mph becoming south in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Breezy.

    High: 80 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 76. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56. West wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 76. West wind around 5 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 80. Breezy.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 59. Chance of precipitation is 80%.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 64.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 46.
Monday
A 40 percent chance of showers. Mostly cloudy, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walnut IL
 41.55°N 89.6°W (Elev. 696 ft)
Last Update:
2:51 pm CDT Apr 20, 2026
Forecast Valid:
5pm CDT Apr 20, 2026-6pm CDT Apr 27, 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