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.

Fair

68°F

20°C

Humidity 64%
Wind Speed SE 8 mph
Barometer 29.69 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 4 May 1:45 pm CDT
Extended Forecast for

Troy ILSimilar City Names

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. South wind around 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 58. South wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 60. West wind 6 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%.

    High: 60 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 46. North wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    Low: 46 °F

    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 59. North wind 7 to 10 mph.

    High: 59 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.

    High: 73 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. South wind around 16 mph, with gusts as high as 25 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 58. South wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 60. West wind 6 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 46. North wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Wednesday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 59. North wind 7 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 46.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 50. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 76.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Troy ILSimilar City Names
 38.72°N 89.89°W (Elev. 551 ft)
Last Update:
1:25 pm CDT May 4, 2026
Forecast Valid:
1pm CDT May 4, 2026-6pm CDT May 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation