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.

A Few Clouds

96°F

36°C

Humidity 40%
Wind Speed S 10 G 17 mph
Barometer 29.87 in (1011.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 16 Jun 3:53 pm CDT
Extended Forecast for

Collinsville IL

  • Tonight

    Tonight: Mostly clear, with a low around 74. South wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 101. South wind 8 to 17 mph, with gusts as high as 24 mph.

    High: 94 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 74. South wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 74 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75. South wind 5 to 14 mph, with gusts as high as 21 mph.

    Low: 75 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 74. South wind 7 to 13 mph, with gusts as high as 20 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 101. South wind 8 to 17 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 74. South wind 9 to 15 mph, with gusts as high as 24 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Partly cloudy, with a low around 75. South wind 5 to 14 mph, with gusts as high as 21 mph.
Juneteenth
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 74.
Thursday
Mostly sunny, with a high near 95.
Thursday Night
Partly cloudy, with a low around 75.
Friday
Sunny and hot, with a high near 97.
Friday Night
Mostly clear, with a low around 76.
Saturday
Mostly sunny and hot, with a high near 98.
Saturday Night
Partly cloudy, with a low around 77.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 95.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville IL
 38.68°N 89.97°W (Elev. 502 ft)
Last Update:
2:22 pm CDT Jun 16, 2024
Forecast Valid:
4pm CDT Jun 16, 2024-6pm CDT Jun 23, 2024
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation