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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Light Drizzle

68°F

20°C

Humidity 92%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 66°F (19°C)
Visibility 5.00 mi
Last update 20 Sep 2:15 pm CDT
Extended Forecast for

Mc Nabb IL

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 4pm, then a chance of showers. Cloudy, with a high near 70. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 1am. Cloudy, with a low around 59. Northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 59 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers between 9am and 10am. Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 64 °F

    Slight Chance
    Showers then
    Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 4pm, then a chance of showers. Cloudy, with a high near 70. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tonight
A 30 percent chance of showers, mainly before 1am. Cloudy, with a low around 59. Northeast wind around 15 mph, with gusts as high as 25 mph.
Monday
A slight chance of showers between 9am and 10am. Mostly cloudy, with a high near 64. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 71.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
Mostly cloudy, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mc Nabb IL
 41.17°N 89.21°W (Elev. 673 ft)
Last Update:
1:26 pm CDT Sep 20, 2026
Forecast Valid:
2pm CDT Sep 20, 2026-6pm CDT Sep 26, 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