Hazardous Weather Conditions
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
78°F
26°C
| Humidity | 85% |
| Wind Speed | S 3 mph |
| Barometer | 30.02 in (1016.0 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 17 Aug 1:53 am CDT |
Extended Forecast for
3 Miles SE Mascoutah IL
Heat Advisory August 17, 02:19am until August 18, 08:00pm
NOW until 8:00pm Mon
Heat Advisory
Overnight
Low: 75 °F
Mostly Clear
Sunday
High: 98 °F
Sunny then
Chance
T-stormsSunday Night
Low: 75 °F
Slight Chance
T-storms then
Mostly ClearMonday
High: 97 °F
Sunny then
Slight Chance
T-stormsMonday Night
Low: 74 °F
Mostly Clear
Tuesday
High: 94 °F
Chance
T-stormsTuesday Night
Low: 72 °F
Chance
T-stormsWednesday
High: 87 °F
Slight Chance
Showers then
Slight Chance
T-storms
Detailed Forecast
Overnight
Mostly clear, with a low around 75. Calm wind.
Sunday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 110. Calm wind.
Sunday Night
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 75. Calm wind.
Monday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 109. Light southeast wind. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 74. Light east wind.
Tuesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny, with a high near 88.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles SE Mascoutah IL
38.49°N 89.76°W (Elev. 427 ft)
38.49°N 89.76°W (Elev. 427 ft)
2:11 am CDT Aug 17, 2025
2am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
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