Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

57°F

14°C

Humidity 44%
Wind Speed Vrbl 5 mph
Barometer 30.52 in (1033.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 17 Oct 1:53 pm CDT
Extended Forecast for

3 Miles SE Waterloo IL

Frost Advisory October 18, 01:00am until October 18, 09:00am
Click here for hazard details and duration
Frost Advisory
  • This Afternoon

    This Afternoon: Sunny, with a high near 59. Light northeast wind.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 36. Calm wind.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Areas of frost before 8am.  Otherwise, sunny, with a high near 69. Calm wind becoming south around 5 mph in the morning.

    High: 69 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37. Calm wind.

    Low: 37 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72. Calm wind.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 59. Light northeast wind.
Tonight
Clear, with a low around 36. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 69. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Clear, with a low around 37. Calm wind.
Monday
Sunny, with a high near 72. Calm wind.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Waterloo IL
 38.31°N 90.1°W (Elev. 541 ft)
1:51 pm CDT Oct 17, 2026
2pm CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
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Additional Resources

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