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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

57°F

14°C

Humidity 39%
Wind Speed NW 14 G 22 mph
Barometer 30.30 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 5 Apr 2:50 pm CDT
Extended Forecast for

4 Miles W Greenville IL

  • Tonight

    Tonight: Clear, with a low around 38. Northwest wind 5 to 10 mph becoming light and variable.

    Low: 38 °F

    Clear

  • Monday

    Monday: Increasing clouds, with a high near 59. Northwest wind 7 to 13 mph.

    High: 59 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A slight chance of rain showers after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 36. North wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 50. East wind around 8 mph.

    High: 50 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. East wind around 7 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 70. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 38. Northwest wind 5 to 10 mph becoming light and variable.
Monday
Increasing clouds, with a high near 59. Northwest wind 7 to 13 mph.
Monday Night
A slight chance of rain showers after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 36. North wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 50. East wind around 8 mph.
Tuesday Night
Mostly cloudy, with a low around 38. East wind around 7 mph.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 70. Chance of precipitation is 20%.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 55.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 73. Chance of precipitation is 40%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Greenville IL
 38.91°N 89.48°W (Elev. 499 ft)
Last Update:
1:26 pm CDT Apr 5, 2026
Forecast Valid:
3pm CDT Apr 5, 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