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/Mist

38°F

3°C

Humidity 96%
Wind Speed E 5 mph
Barometer 30.19 in
Dewpoint 37°F (3°C)
Visibility 0.75 mi
Wind Chill34°F (1°C)
Last update 2 Mar 10:15 pm CST
Extended Forecast for

Troy ILSimilar City Names

  • Tonight

    Tonight: Patchy rain, then rain and possibly a thunderstorm after 3am. Patchy fog after 3am. Low around 38. East wind 3 to 5 mph. Chance of precipitation is 90%.

    Low: 38 °F

    Patchy
    Drizzle then
    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. Patchy fog before 10am. High near 58. East wind around 6 mph. Chance of precipitation is 90%.

    High: 58 °F

    Rain and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms between 2am and 3am, then rain and possibly a thunderstorm after 3am. Low around 50. Northeast wind 6 to 8 mph. Chance of precipitation is 90%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 64. East wind 6 to 8 mph becoming south in the afternoon. Chance of precipitation is 100%.

    High: 64 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 56. South wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 56 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm before noon, then a chance of rain and thunderstorms after noon. High near 71. Chance of precipitation is 80%.

    High: 71 °F

    Rain then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.

    Low: 56 °F

    Chance Rain

  • Friday

    Friday: A chance of rain and thunderstorms before noon, then a slight chance of rain. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 50%.

    High: 78 °F

    Chance
    T-storms then
    Slight Chance
    Rain and
    Breezy

  • Friday Night

    Friday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Chance
    T-storms then
    Rain Likely

Detailed Forecast

Tonight
Patchy rain, then rain and possibly a thunderstorm after 3am. Patchy fog after 3am. Low around 38. East wind 3 to 5 mph. Chance of precipitation is 90%.
Tuesday
Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. Patchy fog before 10am. High near 58. East wind around 6 mph. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms between 2am and 3am, then rain and possibly a thunderstorm after 3am. Low around 50. Northeast wind 6 to 8 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. High near 64. East wind 6 to 8 mph becoming south in the afternoon. Chance of precipitation is 100%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 56. South wind 6 to 8 mph. Chance of precipitation is 80%.
Thursday
Rain and possibly a thunderstorm before noon, then a chance of rain and thunderstorms after noon. High near 71. Chance of precipitation is 80%.
Thursday Night
A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Friday
A chance of rain and thunderstorms before noon, then a slight chance of rain. Partly sunny, with a high near 78. Breezy. Chance of precipitation is 50%.
Friday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Saturday
Rain and possibly a thunderstorm before noon, then a chance of rain and thunderstorms after noon. High near 69. Chance of precipitation is 80%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 48.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 63.
Sunday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 50.
Monday
A 30 percent chance of rain. Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Troy ILSimilar City Names
 38.72°N 89.89°W (Elev. 551 ft)
Last Update:
10:30 pm CST Mar 2, 2026
Forecast Valid:
10pm CST Mar 2, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation