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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

69°F

21°C

Humidity 84%
Wind Speed SE 3 mph
Barometer 29.88 in (1011.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 17 May 12:53 am CDT
Extended Forecast for

Collinsville IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. South wind 6 to 8 mph.

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 89. Breezy, with a south wind 10 to 20 mph, with gusts as high as 29 mph.

    High: 89 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72. South wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 72. South wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 100%.

    High: 86 °F

    Showers
    Likely then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 61. Chance of precipitation is 80%.

    Low: 61 °F

    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 72.

    High: 72 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. South wind 6 to 8 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 89. Breezy, with a south wind 10 to 20 mph, with gusts as high as 29 mph.
Sunday Night
Partly cloudy, with a low around 72. South wind 14 to 16 mph, with gusts as high as 25 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday Night
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 72. South wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday
Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 100%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 61. Chance of precipitation is 80%.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 72.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54.
Thursday
Partly sunny, with a high near 71.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 58.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Collinsville IL
 38.66°N 89.97°W (Elev. 548 ft)
Last Update:
11:51 pm CDT May 16, 2026
Forecast Valid:
1am CDT May 17, 2026-6pm CDT May 23, 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