Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

79°F

26°C

Humidity 74%
Wind Speed S 7 mph
Barometer 30.09 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 5 Aug 9:50 am CDT
Extended Forecast for

Saint Jacob IL

  • Today

    Today: Mostly sunny, with a high near 90. South wind around 8 mph.

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly after 4am.  Partly cloudy during the early evening, then becoming cloudy, with a low around 71. Southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 71 °F

    Scattered
    T-storms then
    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm.  High near 84. Calm wind becoming southwest around 6 mph in the morning.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly after 1am.  Partly cloudy, with a low around 71. Light southeast wind.  Chance of precipitation is 70%.

    Low: 71 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86. Calm wind becoming southwest around 6 mph in the morning.

    High: 86 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 90. South wind around 8 mph.
Tonight
Showers and thunderstorms likely, mainly after 4am. Partly cloudy during the early evening, then becoming cloudy, with a low around 71. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms, mainly before 1pm. High near 84. Calm wind becoming southwest around 6 mph in the morning. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely, mainly after 1am. Partly cloudy, with a low around 71. Light southeast wind. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Calm wind becoming southwest around 6 mph in the morning.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 93.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.7°N 89.77°W (Elev. 509 ft)
9:06 am CDT Aug 5, 2026
11am CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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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