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 Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

70°F

21°C

Humidity 79%
Wind Speed W 8 G 16 mph
Barometer 29.66 in (1004.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 1 Aug 6:53 am CDT
Extended Forecast for

Valmeyer IL

  • Today

    Today: Scattered showers, mainly after 2pm. Patchy fog between 3pm and 4pm. Otherwise, cloudy, with a high near 74. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.

    High: 74 °F

    Cloudy then
    Scattered
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Scattered showers, mainly before 4am. Patchy fog before midnight. Otherwise, cloudy, with a low around 67. Northwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    Low: 67 °F

    Scattered
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Isolated showers before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 79 °F

    Isolated
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. North wind 3 to 8 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 82. North wind 3 to 5 mph.

    High: 82 °F

    Mostly Sunny

  • Monday Night

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

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Tuesday Night

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

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Scattered showers, mainly after 2pm. Patchy fog between 3pm and 4pm. Otherwise, cloudy, with a high near 74. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.
Tonight
Scattered showers, mainly before 4am. Patchy fog before midnight. Otherwise, cloudy, with a low around 67. Northwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Sunday
Isolated showers before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 65. North wind 3 to 8 mph.
Monday
Mostly sunny, with a high near 82. North wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 70.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.29°N 90.3°W (Elev. 515 ft)
Last Update:
6:21 am CDT Aug 1, 2026
Forecast Valid:
7am CDT Aug 1, 2026-6pm CDT Aug 7, 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