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. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

84°F

29°C

Humidity 55%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Aug 12:50 pm CDT
Extended Forecast for

Troy IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. Southeast wind 3 to 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Light south wind increasing to 5 to 9 mph in the morning.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 5am.  Mostly cloudy, with a low around 71. South wind 3 to 6 mph.  Chance of precipitation is 60%.

    Low: 71 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm.  High near 84. Light and variable wind becoming south around 6 mph in the morning.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. Southeast wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 68. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 90. Light south wind increasing to 5 to 9 mph in the morning.
Wednesday Night
Showers and thunderstorms likely, mainly after 5am. Mostly cloudy, with a low around 71. South wind 3 to 6 mph. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms, mainly before 1pm. High near 84. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
Troy IL
 38.74°N 89.89°W (Elev. 551 ft)
1:26 pm CDT Aug 4, 2026
1pm CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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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