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

68°F

20°C

Humidity 94%
Wind Speed W 7 mph
Barometer 29.67 in
Dewpoint 66°F (19°C)
Visibility 7.00 mi
Last update 1 Aug 9:50 am CDT
Extended Forecast for

2 Miles ESE Maryville IL

  • Today

    Today: A chance of drizzle, mainly between 1pm and 4pm, then scattered showers and thunderstorms after 4pm. Cloudy, with a high near 74. West wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 74 °F

    Slight Chance
    Drizzle then
    Scattered
    Showers

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 10pm, then scattered showers. Patchy fog between 9pm and 2am. Otherwise, cloudy, with a low around 68. North wind around 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: Isolated showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 80 °F

    Isolated
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. North wind 5 to 13 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83. North wind 5 to 8 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65.

    Low: 65 °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 67.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
A chance of drizzle, mainly between 1pm and 4pm, then scattered showers and thunderstorms after 4pm. Cloudy, with a high near 74. West wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Tonight
Showers likely and possibly a thunderstorm before 10pm, then scattered showers. Patchy fog between 9pm and 2am. Otherwise, cloudy, with a low around 68. North wind around 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Sunday
Isolated showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 65. North wind 5 to 13 mph.
Monday
Sunny, with a high near 83. North wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 87.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Maryville IL
 38.72°N 89.94°W (Elev. 554 ft)
Last Update:
9:06 am CDT Aug 1, 2026
Forecast Valid:
10am 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