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

45°F

7°C

Humidity 93%
Wind Speed E 8 mph
Barometer 30.24 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 24 Dec 6:45 am CST
Extended Forecast for

Troy IL

Dense Fog Advisory December 24, 07:22am until December 24, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 24, 07:22am until December 24, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Today

    High: 63 °F

    Patchy
    Drizzle and
    Areas Dense
    Fog

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 53. South wind 5 to 7 mph becoming light and variable after midnight.

    Low: 53 °F

    Patchy Fog

  • Christmas Day

    Christmas Day: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. Light and variable wind becoming northeast around 6 mph in the morning.

    High: 64 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56. East wind 6 to 9 mph becoming south after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70. South wind 6 to 11 mph becoming northwest in the afternoon.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy drizzle between 8am and 1pm. Areas of dense fog before 10am. Otherwise, cloudy, with a high near 63. Northeast wind 5 to 9 mph becoming south in the afternoon.
Tonight
Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 53. South wind 5 to 7 mph becoming light and variable after midnight.
Christmas Day
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. Light and variable wind becoming northeast around 6 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 56. East wind 6 to 9 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 70. South wind 6 to 11 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Partly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
A chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 52. Breezy. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 27.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Troy IL
 38.72°N 89.89°W (Elev. 551 ft)
Last Update:
6:41 am CST Dec 24, 2025
Forecast Valid:
7am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation