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.

Mostly Cloudy

81°F

27°C

Humidity 54%
Wind Speed NW 7 mph
Barometer 29.99 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 Jun 2:50 pm CDT
Extended Forecast for

4 Miles NNE Troy IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Northwest wind around 5 mph. Chance of precipitation is 20%.

    High: 84 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Increasing clouds, with a low around 66. Light and variable wind becoming east around 6 mph after midnight.

    Low: 66 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers and thunderstorms, mainly before 3pm. High near 83. Southeast wind 8 to 17 mph becoming south in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    High: 83 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 3am, then isolated showers. Low around 66. Southwest wind 9 to 13 mph becoming west in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms then
    Scattered
    T-storms

  • Monday

    Monday: A slight chance of showers between 7am and 10am. Mostly cloudy, with a high near 77. North wind 9 to 11 mph. Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Northwest wind around 5 mph. Chance of precipitation is 20%.
Tonight
Increasing clouds, with a low around 66. Light and variable wind becoming east around 6 mph after midnight.
Sunday
Showers and thunderstorms, mainly before 3pm. High near 83. Southeast wind 8 to 17 mph becoming south in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms before 3am, then isolated showers. Low around 66. Southwest wind 9 to 13 mph becoming west in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Monday
A slight chance of showers between 7am and 10am. Mostly cloudy, with a high near 77. North wind 9 to 11 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Troy IL
 38.79°N 89.88°W (Elev. 551 ft)
Last Update:
2:51 pm CDT Jun 20, 2026
Forecast Valid:
3pm CDT Jun 20, 2026-6pm CDT Jun 27, 2026
 
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