Dangerous Heat and Possible Flooding
Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Partly Cloudy
82°F
28°C
| Humidity | 51% |
| Wind Speed | NA |
| Barometer | 30.15 in (1020.6 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 28 Aug 12:53 pm CDT |
Extended Forecast for
Dupo IL
This Afternoon
High: 87 °F
Mostly Sunny
Tonight
Low: 64 °F
Mostly Clear
Saturday
High: 90 °F
Mostly Sunny
Saturday Night
Low: 69 °F
Partly Cloudy
Sunday
High: 94 °F
Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 97 °F
Hot
Monday Night
Low: 76 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Detailed Forecast
This Afternoon
Mostly sunny, with a high near 87. Northeast wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 64. Light and variable wind.
Saturday
Mostly sunny, with a high near 90. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 69. South wind around 6 mph.
Sunday
Sunny, with a high near 94. South wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 99.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Dupo IL
38.51°N 90.21°W (Elev. 397 ft)
38.51°N 90.21°W (Elev. 397 ft)
12:11 pm CDT Aug 28, 2026
1pm CDT Aug 28, 2026-6pm CDT Sep 3, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
