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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fair

75°F

24°C

Humidity 88%
Wind Speed SW 10 G 22 mph
Barometer 29.71 in (1004.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 31 Jul 11:51 pm CDT
Extended Forecast for

2 Miles SW Saint Ann MO

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. West wind around 10 mph.

    Low: 68 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm, mainly after 1pm. Mostly cloudy, with a high near 77. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 77 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Cloudy, with a low around 68. North wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind around 14 mph, with gusts as high as 23 mph.

    High: 80 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. North wind 5 to 9 mph becoming light after midnight.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. West wind around 10 mph.
Saturday
Showers likely and possibly a thunderstorm, mainly after 1pm. Mostly cloudy, with a high near 77. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms. Cloudy, with a low around 68. North wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Sunday
A 20 percent chance of showers before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind around 14 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 66. North wind 5 to 9 mph becoming light after midnight.
Monday
Mostly sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 90.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Friday
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Saint Ann MO
 38.69°N 90.4°W (Elev. 636 ft)
Last Update:
10:51 pm CDT Jul 31, 2026
Forecast Valid:
12am 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