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

Areas of Showers and Thunderstorms to Start the Work Week

Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Light Drizzle

59°F

15°C

Humidity 100%
Wind Speed NE 17 G 21 mph
Barometer 30.06 in
Dewpoint 59°F (15°C)
Visibility 7.00 mi
Last update 20 Sep 7:55 pm CDT
Extended Forecast for

Marengo IL

  • Tonight

    Tonight: Patchy drizzle before 10pm. Cloudy, with a low around 56. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 56 °F

    Patchy
    Drizzle then
    Cloudy

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Cloudy, with a high near 62. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 62 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 51. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 62. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 62 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy drizzle before 10pm. Cloudy, with a low around 56. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
A 20 percent chance of showers before 1pm. Cloudy, with a high near 62. East northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 51. Northeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 62. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 48. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 66.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
Mostly cloudy, with a high near 68.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Mostly cloudy, with a high near 70.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marengo IL
 42.24°N 88.59°W
Last Update:
2:46 pm CDT Sep 20, 2026
Forecast Valid:
8pm CDT Sep 20, 2026-6pm CDT Sep 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation