National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

63°F

17°C

Humidity 93%
Wind Speed SW 3 mph
Barometer 29.98 in (1014.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 3:53 am CDT
Extended Forecast for

2 Miles NNW Collinsville IL

  • Juneteenth

    Juneteenth: Sunny, with a high near 83. Calm wind becoming northwest around 5 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light southwest wind.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 68. Southeast wind 3 to 6 mph.

    Low: 68 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. South wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    High: 84 °F

    Showers then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 90%.

    Low: 67 °F

    T-storms then
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Sunny, with a high near 83. Calm wind becoming northwest around 5 mph.
Tonight
Mostly cloudy, with a low around 65. Light and variable wind.
Saturday
Mostly sunny, with a high near 86. Light southwest wind.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 68. Southeast wind 3 to 6 mph.
Sunday
Showers and possibly a thunderstorm. High near 84. South wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 90%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Collinsville IL
 38.7°N 90°W (Elev. 499 ft)
Last Update:
2:06 am CDT Jun 19, 2026
Forecast Valid:
4am CDT Jun 19, 2026-6pm CDT Jun 25, 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