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

54°F

12°C

Humidity 97%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 53°F (12°C)
Visibility 0.75 mi
Last update 25 Dec 4:55 am CST
Extended Forecast for

3 Miles NNW Troy IL

Dense Fog Advisory December 25, 05:05am until December 25, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 25, 05:05am until December 25, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Christmas Day

    High: 65 °F

    Dense Fog

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. East wind 6 to 8 mph becoming south after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69. Southwest wind 7 to 11 mph becoming northwest in the afternoon.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. Northwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 66. Southeast wind 5 to 10 mph.

    High: 66 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A slight chance of rain and thunderstorms between midnight and 3am, then a slight chance of rain after 3am. Cloudy, with a steady temperature around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Cloudy then
    Slight Chance
    T-storms

  • Sunday

    Sunday: A chance of rain, then rain likely and possibly a thunderstorm after noon. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 40%.

    Low: 20 °F

    Blustery.
    Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Christmas Day
Widespread dense fog, mainly before 10am. Otherwise, cloudy, with a high near 65. Calm wind becoming east around 6 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 57. East wind 6 to 8 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 69. Southwest wind 7 to 11 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 46. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 66. Southeast wind 5 to 10 mph.
Saturday Night
A slight chance of rain and thunderstorms between midnight and 3am, then a slight chance of rain after 3am. Cloudy, with a steady temperature around 61. Chance of precipitation is 20%.
Sunday
A chance of rain, then rain likely and possibly a thunderstorm after noon. Cloudy, with a high near 66. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 40%.
Monday
Sunny, with a high near 27. Blustery.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Sunny, with a high near 34.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Troy IL
 38.77°N 89.91°W (Elev. 551 ft)
Last Update:
4:41 am CST Dec 25, 2025
Forecast Valid:
5am CST Dec 25, 2025-6pm CST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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