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.

Fog

38°F

3°C

Humidity 97%
Wind Speed E 7 mph
Barometer 30.14 in
Dewpoint 38°F (3°C)
Visibility 0.50 mi
Wind Chill33°F (1°C)
Last update 3 Mar 1:15 am CST
Extended Forecast for

Troy ILSimilar City Names

  • Overnight

    Overnight: A chance of showers, then showers and possibly a thunderstorm after 3am. Patchy fog after 3am. Low around 37. East wind 3 to 5 mph. Chance of precipitation is 90%.

    Low: 37 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. Patchy fog before 10am. High near 57. East wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 90%.

    High: 57 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 48. East wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 64. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 64 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 55. South wind 5 to 7 mph. Chance of precipitation is 90%.

    Low: 55 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

    High: 69 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before noon, then a slight chance of showers. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    T-storms then
    Slight Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
A chance of showers, then showers and possibly a thunderstorm after 3am. Patchy fog after 3am. Low around 37. East wind 3 to 5 mph. Chance of precipitation is 90%.
Tuesday
Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. Patchy fog before 10am. High near 57. East wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 48. East wind 6 to 8 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 64. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 55. South wind 5 to 7 mph. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms before noon, then a slight chance of showers. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 40%.
Friday Night
A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 49.
Monday
A 20 percent chance of showers. Sunny, with a high near 72.
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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:
12:26 am CST Mar 3, 2026
Forecast Valid:
1am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation