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

Rochelle, Rochelle Municipal-Koritz Field Airport (KRPJ)

Lat: 41.89°NLon: 89.08°WElev: 768ft.

Overcast with Haze

37°F

3°C

Humidity 63%
Wind Speed E 15 G 18 mph
Barometer 29.77 in
Dewpoint 25°F (-4°C)
Visibility 4.00 mi
Wind Chill28°F (-2°C)
Last update 15 Mar 1:55 am CDT
Extended Forecast for

De Kalb IL

  • Overnight

    Overnight: A 20 percent chance of showers. Cloudy, with a steady temperature around 36. Breezy, with an east southeast wind around 20 mph, with gusts as high as 25 mph.

    Low: 36 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Showers and thunderstorms before noon, then showers and possibly a thunderstorm, mainly after noon. High near 58. Windy, with a south wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers and
    Windy

  • Sunday Night

    Sunday Night: Rain showers before 11pm, then rain and snow showers between 11pm and midnight, then snow showers after midnight. Some thunder is also possible. Patchy blowing snow after 1am. Low around 20. Windy, with a west southwest wind 20 to 30 mph becoming northwest in the evening. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 20 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow showers likely, mainly before 1pm. Widespread blowing snow, mainly before 1pm. Cloudy, with a high near 21. Wind chill values as low as 1. Windy, with a northwest wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 21 °F

    Snow Showers
    Likely and
    Blowing Snow

  • Monday Night

    Monday Night: Patchy blowing snow before 7pm. Mostly cloudy, with a low around 7. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 30 mph.

    Low: 7 °F

    Patchy
    Blowing Snow
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow showers likely, mainly after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 70%.

    Low: 18 °F

    Chance Snow
    Showers then
    Snow Showers
    Likely

  • Wednesday

    Wednesday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a steady temperature around 36. Breezy, with an east southeast wind around 20 mph, with gusts as high as 25 mph.
Sunday
Showers and thunderstorms before noon, then showers and possibly a thunderstorm, mainly after noon. High near 58. Windy, with a south wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain showers before 11pm, then rain and snow showers between 11pm and midnight, then snow showers after midnight. Some thunder is also possible. Patchy blowing snow after 1am. Low around 20. Windy, with a west southwest wind 20 to 30 mph becoming northwest in the evening. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Monday
Snow showers likely, mainly before 1pm. Widespread blowing snow, mainly before 1pm. Cloudy, with a high near 21. Wind chill values as low as 1. Windy, with a northwest wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday Night
Patchy blowing snow before 7pm. Mostly cloudy, with a low around 7. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 24.
Tuesday Night
Snow showers likely, mainly after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 70%.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Mostly cloudy, with a high near 60.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
De Kalb IL
 41.92°N 88.76°W
Last Update:
2:11 am CDT Mar 15, 2026
Forecast Valid:
2am CDT Mar 15, 2026-6pm CDT Mar 21, 2026
 
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Additional Resources

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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