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

Significant Coastal Impacts to the Eastern Seaboard; Tropical Storm Nolo to Impact Hawaii

A Nor'easter will bring significant coastal impacts to the Mid-Atlantic and New England through the weekend. Moderate to major coastal flooding, heavy rain, strong winds and high surf expected. Tropical Storm Nolo will continue to strengthen as it moves north toward the Big Island of Hawaii. Heavy rainfall may bring life-threatening, catastrophic flooding and mudslides through the weekend. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

60°F

16°C

Humidity 93%
Wind Speed Calm
Barometer 30.24 in (1023.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 24 Sep 8:53 pm CDT
Extended Forecast for

Collinsville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. Light northeast wind.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 73. East wind 3 to 6 mph.

    High: 73 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 60. Northeast wind 3 to 6 mph.

    Low: 60 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 72. Light east wind.

    High: 72 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 60. Light east wind.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 75.

    High: 75 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. Light northeast wind.
Friday
Partly sunny, with a high near 73. East wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 60. Northeast wind 3 to 6 mph.
Saturday
Mostly cloudy, with a high near 72. Light east wind.
Saturday Night
Mostly cloudy, with a low around 60. Light east wind.
Sunday
Mostly cloudy, with a high near 75.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 81.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 68.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 66.
Thursday
A 40 percent chance of showers. Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville IL
 38.7°N 89.97°W (Elev. 551 ft)
Last Update:
9:06 pm CDT Sep 24, 2026
Forecast Valid:
9pm CDT Sep 24, 2026-6pm CDT Oct 1, 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