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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

65°F

18°C

Humidity 87%
Wind Speed N 7 mph
Barometer 29.71 in (1005.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 May 12:54 am CDT
Extended Forecast for

Grafton IL

  • Overnight

    Overnight: Isolated showers and thunderstorms before 2am. Cloudy, with a low around 58. North wind around 10 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Isolated
    T-storms

  • Wednesday

    Wednesday: Cloudy, with a high near 75. North wind 7 to 10 mph.

    High: 75 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59. North wind around 6 mph becoming calm.

    Low: 59 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. South wind 6 to 10 mph. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind 5 to 8 mph.

    Low: 62 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Isolated showers and thunderstorms before 2am. Cloudy, with a low around 58. North wind around 10 mph. Chance of precipitation is 20%.
Wednesday
Cloudy, with a high near 75. North wind 7 to 10 mph.
Wednesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59. North wind around 6 mph becoming calm.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. South wind 6 to 10 mph. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind 5 to 8 mph.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 63.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Grafton IL
 38.98°N 90.44°W (Elev. 515 ft)
Last Update:
10:07 pm CDT May 14, 2024
Forecast Valid:
1am CDT May 15, 2024-6pm CDT May 21, 2024
 
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