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

Hazardous Weather Conditions

Current conditions at

Macomb Municipal Airport (KMQB)

Lat: 40.52°NLon: 90.65°WElev: 679ft.

Fair

78°F

26°C

Humidity 99%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 30 Jun 12:55 am CDT
Extended Forecast for

Marietta IL

Extreme Heat Warning until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 3, 12:00am

    NOW until 12:00am Fri

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 95. Heat index values as high as 109. South southwest wind 9 to 17 mph, with gusts as high as 26 mph.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 105. South southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 94. South southwest wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 94 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 75. South southwest wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 75. South southwest wind 7 to 9 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny and hot, with a high near 95. Heat index values as high as 109. South southwest wind 9 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Clear, with a low around 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Wednesday
Sunny and hot, with a high near 95. Heat index values as high as 105. South southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind 5 to 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 94. South southwest wind 5 to 9 mph, with gusts as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 75. South southwest wind around 6 mph becoming calm in the evening.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
Mostly sunny, with a high near 91.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Sunday Night
A chance of showers. Partly cloudy, with a low around 70.
Monday
Mostly sunny, with a high near 86.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marietta IL
 40.5°N 90.41°W (Elev. 650 ft)
Last Update:
12:26 am CDT Jun 30, 2026
Forecast Valid:
1am CDT Jun 30, 2026-6pm CDT Jul 6, 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