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

Extreme Heat Continues; Severe Thunderstorms into Upper Midwest; Strong Bering Sea Storm

Wildfires and poor air quality continue for the Pacific Northwest, Rockies and extended into the Plains. Severe thunderstorms possible for the northern Plains and upper Midwest on Monday along a frontal boundary. Another boundary will focus showers and thunderstorms for the eastern seaboard with localized heavy rainfall possible. For Alaska, a strong Bering Sea storm will bring winds and rainfall. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Mostly Cloudy

79°F

26°C

Humidity 65%
Wind Speed N 15 G 23 mph
Barometer 29.88 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 2 Aug 2:50 pm CDT
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Mostly clear, with a low around 63. North wind 6 to 11 mph becoming light in the evening.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84. Calm wind becoming northeast around 5 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. Light east wind.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Light southeast wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 63. North wind 6 to 11 mph becoming light in the evening.
Monday
Sunny, with a high near 84. Calm wind becoming northeast around 5 mph.
Monday Night
Mostly clear, with a low around 63. Light east wind.
Tuesday
Sunny, with a high near 86. Light southeast wind.
Tuesday Night
Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
1:26 pm CDT Aug 2, 2026
Forecast Valid:
3pm CDT Aug 2, 2026-6pm CDT Aug 9, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation