Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Sprawling Storm System Bringing Impactful Weather To Western and Central U.S. Through Midweek

A large storm system will extend from the West Coast to the Great Lakes during the next couple days bringing hazardous weather to many parts of the country. Heavy snow is expected in the higher terrain of the West, along with very strong winds. Snow and ice will disrupt travel in parts of the Midwest, and heavy rain could cause widespread flooding in the Mississippi Valley and Great Lakes. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

49°F

9°C

Humidity 52%
Wind Speed SE 16 mph
Barometer 29.95 in (1014.7 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 18 Feb 5:51 pm CST
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am.  Temperature falling to near 46 by 8pm, then rising to around 55 during the remainder of the night. South wind around 14 mph.  Chance of precipitation is 90%.

    Mostly Cloudy
    then Showers

    Low: 46 °F

  • Washington's
    Birthday

    Washington's Birthday: Showers and possibly a thunderstorm.  High near 71. South wind 14 to 18 mph, with gusts as high as 28 mph.  Chance of precipitation is 90%.

    Showers

    High: 71 °F

  • Monday
    Night

    Monday Night: Showers likely and possibly a thunderstorm.  Cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%.

    Showers
    Likely

    Low: 61 °F

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  High near 73. South wind 11 to 16 mph, with gusts as high as 32 mph.  Chance of precipitation is 80%.

    Showers

    High: 73 °F

  • Tuesday
    Night

    Tuesday Night: Showers.  Low around 32. South wind 10 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph.  Chance of precipitation is 90%.

    Showers

    Low: 32 °F

  • Wednesday

    Wednesday: A chance of rain before 8am, then a chance of freezing rain between 8am and 10am, then a chance of rain after 10am.  Cloudy, with a high near 37. Chance of precipitation is 50%.

    Chance
    Rain/Freezing
    Rain then
    Chance Rain

    High: 37 °F

  • Wednesday
    Night

    Wednesday Night: A chance of rain before 1am, then a slight chance of freezing rain.  Cloudy, with a low around 30. Chance of precipitation is 30%.

    Chance Rain
    then Slight
    Chance
    Rain/Freezing
    Rain

    Low: 30 °F

  • Thursday

    Thursday: Mostly cloudy, with a high near 48.

    Mostly Cloudy

    High: 48 °F

  • Thursday
    Night

    Thursday Night: Showers likely, mainly after midnight.  Mostly cloudy, with a low around 38. Chance of precipitation is 70%.

    Slight Chance
    Showers then
    Showers
    Likely

    Low: 38 °F

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Temperature falling to near 46 by 8pm, then rising to around 55 during the remainder of the night. South wind around 14 mph. Chance of precipitation is 90%.
Washington's Birthday
Showers and possibly a thunderstorm. High near 71. South wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Monday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 73. South wind 11 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.
Tuesday Night
Showers. Low around 32. South wind 10 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 90%.
Wednesday
A chance of rain before 8am, then a chance of freezing rain between 8am and 10am, then a chance of rain after 10am. Cloudy, with a high near 37. Chance of precipitation is 50%.
Wednesday Night
A chance of rain before 1am, then a slight chance of freezing rain. Cloudy, with a low around 30. Chance of precipitation is 30%.
Thursday
Mostly cloudy, with a high near 48.
Thursday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.
Friday
Showers likely, mainly before noon. Cloudy, with a high near 54. Chance of precipitation is 70%.
Friday Night
Showers. Low around 42. Chance of precipitation is 80%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 60.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 55.
Click Map For Forecast
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
5:43 pm CST Feb 18, 2018
6pm CST Feb 18, 2018-6pm CST Feb 25, 2018
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database