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.

A Few Clouds

72°F

22°C

Humidity 91%
Wind Speed Calm
Barometer 30.04 in (1016.8 mb)
Dewpoint 69°F (21°C)
Visibility 9.00 mi
Last update 4 Aug 7:54 am CDT
Extended Forecast for

5 Miles WNW Fidelity IL

  • Today

    Today: Sunny, with a high near 87. Southeast wind 3 to 5 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Southeast wind 3 to 5 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. South wind 3 to 6 mph.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am.  Low around 68. South wind 5 to 7 mph.  Chance of precipitation is 80%.

    Low: 68 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Partly sunny, with a high near 84. South wind around 6 mph.  Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 66.

    Low: 66 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 87. Southeast wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 66. Southeast wind 3 to 5 mph.
Wednesday
Sunny, with a high near 89. South wind 3 to 6 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 68. South wind 5 to 7 mph. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 84. South wind around 6 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Friday
Partly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 72.
Monday
Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Fidelity IL
 39.17°N 90.24°W (Elev. 502 ft)
5:21 am CDT Aug 4, 2026
8am CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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