Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

87°F

31°C

Humidity 46%
Wind Speed E 5 mph
Barometer 29.99 in (1015.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 4 Aug 2:54 pm CDT
Extended Forecast for

Fieldon IL

  • Tonight

    Tonight: Mostly clear, with a low around 69. Southeast wind 3 to 6 mph.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Sunny, then becoming mostly cloudy during the afternoon, with a high near 88. Light south wind increasing to 5 to 9 mph in the morning.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms.  Low around 69. East wind 5 to 7 mph becoming light and variable  after midnight.  Chance of precipitation is 80%.

    Low: 69 °F

    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am.  High near 83. South wind 3 to 5 mph.  Chance of precipitation is 80%.

    High: 83 °F

    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 68. Light and variable wind.

    Low: 68 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 69. Southeast wind 3 to 6 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 88. Light south wind increasing to 5 to 9 mph in the morning.
Wednesday Night
Showers and thunderstorms. Low around 69. East wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before 10am. High near 83. South wind 3 to 5 mph. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Light and variable wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 69.
Saturday
Sunny, with a high near 88.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.
Sunday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Fieldon IL
 39.11°N 90.49°W (Elev. 640 ft)
1:26 pm CDT Aug 4, 2026
3pm CDT Aug 4, 2026-6pm CDT Aug 11, 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