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

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

84°F

29°C

Humidity 70%
Wind Speed Calm
Barometer 30.08 in (1018.4 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 17 Aug 8:56 am CDT
Extended Forecast for

Tamaroa IL

Heat Advisory August 17, 09:21am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 09:21am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Today

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. South wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 98. Heat index values as high as 105. Light east wind.

    High: 98 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. East wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. West northwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 90. North wind 5 to 10 mph.

    High: 90 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. North northeast wind 6 to 9 mph.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Calm wind becoming east around 5 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. South wind around 5 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 98. Heat index values as high as 105. Light east wind.
Monday Night
Mostly clear, with a low around 75. East wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Calm wind becoming west northwest around 6 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. West northwest wind around 5 mph becoming calm in the evening.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 90. North wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 68. North northeast wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 88. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind 3 to 8 mph.
Friday
Sunny, with a high near 90. North northeast wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 91. Calm wind becoming north around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tamaroa IL
 38.14°N 89.24°W
Last Update:
8:31 am CDT Aug 17, 2025
Forecast Valid:
9am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
 
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