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. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

69°F

21°C

Humidity 91%
Wind Speed N 7 G 16 mph
Barometer 29.76 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 2 Aug 1:55 am CDT
Extended Forecast for

4 Miles NW Chesterfield IL

  • Overnight

    Overnight: A chance of drizzle, mainly before 5am. Mostly cloudy, with a low around 65. North wind around 14 mph, with gusts as high as 21 mph.

    Low: 65 °F

    Chance
    Drizzle

  • Sunday

    Sunday: Mostly sunny, with a high near 81. North wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. North wind 5 to 8 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84. Light northeast wind.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

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

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A chance of drizzle, mainly before 5am. Mostly cloudy, with a low around 65. North wind around 14 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 81. North wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 61. North wind 5 to 8 mph becoming calm in the evening.
Monday
Sunny, with a high near 84. Light northeast wind.
Monday Night
Clear, with a low around 61. Calm wind.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 87.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Chesterfield IL
 39.3°N 90.12°W (Elev. 522 ft)
Last Update:
1:26 am CDT Aug 2, 2026
Forecast Valid:
2am CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
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