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

59°F

15°C

Humidity 34%
Wind Speed NW 14 G 21 mph
Barometer 30.32 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 6 Apr 12:50 pm CDT
Extended Forecast for

Saint Jacob IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 62. Northwest wind around 10 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 37. Northeast wind 6 to 9 mph.

    Low: 37 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 20 percent chance of showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 53. East wind 9 to 11 mph.

    High: 53 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. Southeast wind around 8 mph.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 70. South wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 70 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 62. Northwest wind around 10 mph.
Tonight
Increasing clouds, with a low around 37. Northeast wind 6 to 9 mph.
Tuesday
A 20 percent chance of showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 53. East wind 9 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 38. Southeast wind around 8 mph.
Wednesday
Partly sunny, with a high near 70. South wind 8 to 16 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 69.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
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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:
11:01 am CDT Apr 6, 2026
Forecast Valid:
12pm CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
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