National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

73°F

23°C

Humidity 94%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 26 Jun 10:55 pm CDT
Extended Forecast for

Troy ILSimilar City Names

Flood Watch June 26, 11:25pm until June 27, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 11:25pm until June 27, 07:00am

    NOW until 7:00am Sat

    Flood Watch

  • Tonight

    Low: 68 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 11am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind around 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 109. South wind 7 to 11 mph.

    High: 93 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 68. Light south wind. Chance of precipitation is 40%.
Saturday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 11am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 20%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind around 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 109. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 77.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Troy ILSimilar City Names
 38.72°N 89.89°W (Elev. 551 ft)
Last Update:
10:31 pm CDT Jun 26, 2026
Forecast Valid:
11pm CDT Jun 26, 2026-6pm CDT Jul 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation