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

Macomb Municipal Airport (KMQB)

Lat: 40.52°NLon: 90.65°WElev: 679ft.

Fair

78°F

26°C

Humidity 25%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 28 Sep 3:55 pm CDT
Extended Forecast for

Marietta IL

  • Tonight

    Tonight: Clear, with a low around 50. Calm wind.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64. South wind 5 to 7 mph, with gusts as high as 17 mph.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers. Mostly cloudy, with a high near 78. South wind 5 to 7 mph, with gusts as high as 16 mph.

    High: 78 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 68. South wind 3 to 6 mph. Winds could gust as high as 18 mph.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers. High near 73. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.

    High: 73 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely. Mostly cloudy, with a low around 57. North wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 57 °F

    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 50. Calm wind.
Tuesday
Sunny, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 64. South wind 5 to 7 mph, with gusts as high as 17 mph.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 78. South wind 5 to 7 mph, with gusts as high as 16 mph.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 68. South wind 3 to 6 mph. Winds could gust as high as 18 mph.
Thursday
Showers. High near 73. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.
Thursday Night
Showers likely. Mostly cloudy, with a low around 57. North wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 66.
Friday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 52.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marietta IL
 40.5°N 90.41°W (Elev. 650 ft)
Last Update:
2:01 pm CDT Sep 28, 2026
Forecast Valid:
4pm CDT Sep 28, 2026-6pm CDT Oct 5, 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