Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

77°F

25°C

Humidity 57%
Wind Speed W 9 mph
Barometer 29.90 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 20 Sep 4:35 am CDT
Extended Forecast for

Edwardsville IL

  • Today

    Today: Partly sunny, with a high near 93. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 93 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 3am, then a chance of showers and thunderstorms after 3am.  Increasing clouds, with a low around 68. North wind 6 to 8 mph.  Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms.  Mostly cloudy, with a high near 79. Northeast wind 6 to 9 mph.  Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 62. Northeast wind 7 to 10 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 73. North wind 10 to 13 mph.

    High: 73 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 93. Light and variable wind becoming west 5 to 8 mph in the morning.
Tonight
A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 3am, then a chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 68. North wind 6 to 8 mph. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Northeast wind 6 to 9 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 62. Northeast wind 7 to 10 mph.
Tuesday
Mostly cloudy, with a high near 73. North wind 10 to 13 mph.
Tuesday Night
Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Edwardsville IL
 38.79°N 89.97°W (Elev. 558 ft)
1:26 am CDT Sep 20, 2026
4am CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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