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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy

76°F

24°C

Humidity 72%
Wind Speed N 14 mph
Barometer 29.87 in (1011.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 2 Aug 11:54 am CDT
Extended Forecast for

3 Miles WSW Fieldon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. North wind around 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 62. North wind 5 to 7 mph becoming calm in the evening.

    Low: 62 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Light southeast wind.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 82. North wind around 10 mph, with gusts as high as 20 mph.
Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 62. North wind 5 to 7 mph becoming calm in the evening.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 84. Light and variable wind.
Monday Night
Mostly clear, with a low around 64. Calm wind.
Tuesday
Sunny, with a high near 88. Light southeast wind.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Mostly sunny, with a high near 89.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Fieldon IL
 39.09°N 90.55°W (Elev. 528 ft)
Last Update:
11:11 am CDT Aug 2, 2026
Forecast Valid:
12pm CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
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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