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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

30°F

-1°C

Humidity 55%
Wind Speed S 9 mph
Barometer 29.81 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 15 Jan 10:35 pm CST
Extended Forecast for

Troy ILSimilar City Names

  • Tonight

    Tonight: Snow likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 25. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 25 °F

    Snow Likely
    then Mostly
    Cloudy

  • Friday

    Friday: A chance of sprinkles between 3pm and 4pm, then a slight chance of snow after 4pm. Mostly cloudy, with a high near 45. West wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 45 °F

    Partly Sunny
    then Slight
    Chance
    Sprinkles/Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 21 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 26. West wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 26 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.

    Low: 12 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 22.

    High: 22 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

Detailed Forecast

Tonight
Snow likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 25. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Friday
A chance of sprinkles between 3pm and 4pm, then a slight chance of snow after 4pm. Mostly cloudy, with a high near 45. West wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 23 mph.
Saturday
Partly sunny, with a high near 26. West wind 11 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Sunny, with a high near 22.
Monday Night
Mostly clear, with a low around 9.
Tuesday
Sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
Partly sunny, with a high near 41.
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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:
9:41 pm CST Jan 15, 2026
Forecast Valid:
10pm CST Jan 15, 2026-6pm CST Jan 22, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation