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.

Fair

43°F

6°C

Humidity 76%
Wind Speed SW 3 mph
Barometer 30.28 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 6 Apr 2:55 am CDT
Extended Forecast for

Troy IL

  • Overnight

    Overnight: Clear, with a low around 40. West wind 3 to 5 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 37. North wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. East wind around 11 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. East wind around 9 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 40. West wind 3 to 5 mph.
Monday
Sunny, with a high near 62. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Monday Night
Increasing clouds, with a low around 37. North wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday
Mostly cloudy, with a high near 52. East wind around 11 mph.
Tuesday Night
Mostly cloudy, with a low around 39. East wind around 9 mph.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 69.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
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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:
2:41 am CDT Apr 6, 2026
Forecast Valid:
3am CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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