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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

81°F

27°C

Humidity 74%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 17 Jul 5:50 pm CDT
Extended Forecast for

2 Miles NNW Saint Jacob IL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. North wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 86. Light and variable wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 3 to 5 mph.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 5 to 7 mph.

    High: 92 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. South wind 3 to 6 mph.

    Low: 75 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.

    High: 92 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. North wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 50%.
Friday
A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 86. Light and variable wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 50%.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 3 to 5 mph.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 5 to 7 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. South wind 3 to 6 mph.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Saint Jacob IL
 38.74°N 89.77°W (Elev. 453 ft)
Last Update:
5:52 pm CDT Jul 17, 2025
Forecast Valid:
6pm CDT Jul 17, 2025-6pm CDT Jul 24, 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