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.

Fog/Mist

39°F

4°C

Humidity 100%
Wind Speed E 6 mph
Barometer 30.00 in (1016.1 mb)
Dewpoint 39°F (4°C)
Visibility 2.00 mi
Wind Chill35°F (2°C)
Last update 4 Mar 11:56 pm CST
Extended Forecast for

Lanark IL

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 3am. Patchy fog. Otherwise, mostly cloudy, with a low around 40. Northeast wind around 5 mph.

    Low: 40 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: A 30 percent chance of rain before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 53. Northeast wind around 5 mph.

    High: 53 °F

    Chance Rain
    and Patchy
    Fog then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 42. East wind 5 to 10 mph becoming southeast after midnight.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Rain and possibly a thunderstorm. High near 69. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 69 °F

    Rain then
    Rain Likely

  • Friday Night

    Friday Night: Rain likely before 9pm, then rain likely and possibly a thunderstorm between 9pm and midnight, then rain after midnight. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 3am. Patchy fog. Otherwise, mostly cloudy, with a low around 40. Northeast wind around 5 mph.
Thursday
A 30 percent chance of rain before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 53. Northeast wind around 5 mph.
Thursday Night
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 42. East wind 5 to 10 mph becoming southeast after midnight.
Friday
Rain and possibly a thunderstorm. High near 69. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Rain likely before 9pm, then rain likely and possibly a thunderstorm between 9pm and midnight, then rain after midnight. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 32.
Sunday
Sunny, with a high near 60.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Rain likely. Mostly sunny, with a high near 67. Chance of precipitation is 70%.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 50. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lanark IL
 42.11°N 89.83°W (Elev. 883 ft)
Last Update:
12:26 am CST Mar 5, 2026
Forecast Valid:
12am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation