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

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Partly Cloudy

23°F

-5°C

Humidity 53%
Wind Speed N 8 mph
Barometer 30.31 in (1026.7 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 29 Jan 12:54 pm CST
Extended Forecast for

2 Miles WSW Greenfield IL

  • This Afternoon

    This Afternoon: A 40 percent chance of snow, mainly after 3pm. Cloudy and cold, with a high near 19. North wind around 7 mph.

    High: 19 °F

    Chance Snow

  • Tonight

    Tonight: A 30 percent chance of snow, mainly before 7pm. Mostly cloudy, with a low around 1. North wind around 6 mph becoming calm in the evening.

    Low: 1 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 16. Light north wind increasing to 6 to 11 mph in the morning.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 1. Wind chill values as low as -15. North wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 1 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19. Northwest wind 7 to 11 mph.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around -1.

    Low: -1 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15.

    Low: 15 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of snow, mainly after 3pm. Cloudy and cold, with a high near 19. North wind around 7 mph.
Tonight
A 30 percent chance of snow, mainly before 7pm. Mostly cloudy, with a low around 1. North wind around 6 mph becoming calm in the evening.
Friday
Partly sunny and cold, with a high near 16. Light north wind increasing to 6 to 11 mph in the morning.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 1. Wind chill values as low as -15. North wind 9 to 11 mph, with gusts as high as 23 mph.
Saturday
Mostly sunny and cold, with a high near 19. Northwest wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around -1.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 25.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15.
Monday
Partly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Mostly cloudy, with a high near 34.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 21.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Greenfield IL
 39.33°N 90.26°W (Elev. 551 ft)
Last Update:
11:07 am CST Jan 29, 2026
Forecast Valid:
1pm CST Jan 29, 2026-6pm CST Feb 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation