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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fog/Mist

35°F

2°C

Humidity 100%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 35°F (2°C)
Visibility 2.00 mi
Last update 16 Feb 12:53 am CST
Extended Forecast for

Smithton IL

Dense Fog Advisory until February 16, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 16, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 37 °F

    Patchy Dense
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy dense fog between 9am and 10am. Otherwise, mostly sunny, with a high near 65. Light south wind increasing to 5 to 10 mph in the morning.

    High: 65 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South wind 6 to 8 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 64. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 64 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.

    Low: 57 °F

    Cloudy and
    Breezy then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, partly cloudy, with a low around 37. Calm wind.
Washington's Birthday
Patchy dense fog between 9am and 10am. Otherwise, mostly sunny, with a high near 65. Light south wind increasing to 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 43. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 64. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 57. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Partly sunny, with a high near 59.
Friday Night
A 30 percent chance of rain. Low around 36.
Saturday
High near 52.
Saturday Night
Low around 33.
Sunday
High near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
12:26 am CST Feb 16, 2026
Forecast Valid:
1am CST Feb 16, 2026-6pm CST Feb 22, 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