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

Macomb Municipal Airport (KMQB)

Lat: 40.52°NLon: 90.65°WElev: 679ft.

Overcast

76°F

24°C

Humidity 88%
Wind Speed NE 12 mph
Barometer 30.19 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 18 Sep 1:35 pm CDT
Extended Forecast for

Macomb IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. East wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 69. East wind 5 to 10 mph.

    Low: 69 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers between 10am and 11am. Mostly cloudy, with a high near 88. South wind around 5 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 67. Calm wind becoming northwest around 5 mph. Chance of precipitation is 70%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 59. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 59 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. East wind 5 to 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 69. East wind 5 to 10 mph.
Saturday
A slight chance of showers between 10am and 11am. Mostly cloudy, with a high near 88. South wind around 5 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 67. Calm wind becoming northwest around 5 mph. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 59. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 54.
Tuesday
Mostly cloudy, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Macomb IL
 40.46°N 90.7°W (Elev. 673 ft)
Last Update:
1:27 pm CDT Sep 18, 2026
Forecast Valid:
1pm CDT Sep 18, 2026-6pm CDT Sep 24, 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