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

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Partly Cloudy

92°F

33°C

Humidity 59%
Wind Speed SE 5 mph
Barometer 30.04 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 18 Aug 4:15 pm CDT
Extended Forecast for

3 Miles NNE Brownstown IL

Heat Advisory August 18, 04:32pm until August 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 04:32pm until August 19, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Tonight

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 92. Heat index values as high as 101. Light and variable wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 70. North wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. North wind 3 to 8 mph.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66. North wind around 6 mph.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly clear, with a low around 74. Light southeast wind.
Tuesday
A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 92. Heat index values as high as 101. Light and variable wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 70. North wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. North wind 3 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 66. North wind around 6 mph.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 54.
Monday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Brownstown IL
 39.04°N 88.93°W (Elev. 558 ft)
Last Update:
4:16 pm CDT Aug 18, 2025
Forecast Valid:
4pm CDT Aug 18, 2025-6pm CDT Aug 25, 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