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.

Fair

72°F

22°C

Humidity 83%
Wind Speed NE 6 mph
Barometer 30.01 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 15 Jun 9:50 pm CDT
Extended Forecast for

Saint Jacob IL

  • Tonight

    Tonight: Cloudy, with a low around 70. Light east wind.

    Low: 70 °F

    Cloudy

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 82. Southeast wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68. Southeast wind around 6 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South wind around 8 mph.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Cloudy, with a low around 70. Light east wind.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 82. Southeast wind 3 to 7 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 68. Southeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 90. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South wind around 8 mph.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69.
Juneteenth
Mostly sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.72°N 89.77°W (Elev. 499 ft)
Last Update:
9:22 pm CDT Jun 15, 2025
Forecast Valid:
9pm CDT Jun 15, 2025-6pm CDT Jun 22, 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