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 Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
73°F
23°C
| Humidity | 69% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 30.15 in |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 8:50 am CDT |
Extended Forecast for
Gillespie IL
Today
High: 85 °F
Sunny
Tonight
Low: 60 °F
Mostly Clear
Saturday
High: 87 °F
Mostly Sunny
Saturday Night
Low: 66 °F
Mostly Clear
Sunday
High: 92 °F
Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 96 °F
Sunny
Monday Night
Low: 73 °F
Mostly Clear
Tuesday
High: 97 °F
Hot
Detailed Forecast
Today
Sunny, with a high near 85. Light north wind.
Tonight
Mostly clear, with a low around 60. Calm wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 66. South wind around 6 mph.
Sunday
Sunny, with a high near 92. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 98.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Gillespie IL
39.12°N 89.81°W (Elev. 653 ft)
39.12°N 89.81°W (Elev. 653 ft)
6:21 am CDT Aug 28, 2026
9am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
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