Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Fair

84°F

29°C

Humidity 55%
Wind Speed E 3 mph
Barometer 30.06 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Aug 2:15 pm CDT
Extended Forecast for

Saint Elmo IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. Calm wind.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 63. Light southeast wind.

    Low: 63 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the morning.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after midnight.  Increasing clouds, with a low around 68. Southeast wind around 6 mph becoming calm  after midnight.

    Low: 68 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 1pm.  Partly sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the morning.  Chance of precipitation is 70%.

    High: 81 °F

    T-storms
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 85. Calm wind.
Tonight
Clear, with a low around 63. Light southeast wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the morning.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 68. Southeast wind around 6 mph becoming calm after midnight.
Thursday
Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Elmo IL
 39.02°N 88.85°W (Elev. 600 ft)
1:26 pm CDT Aug 4, 2026
2pm CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database