Portage Des Sioux Weather Forecast
- 52
- 75
Sunny
- 59
- 81
Partly Sunny
- 58
- 81
Partly Sunny
- 57
- 80
Partly Sunny
- 58
- 79
Partly Sunny
- 59
- 81
Partly Sunny
Today 26 Aug St. Charles
Sunny. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.
Tonight 26 Aug St. Charles
Clear. Lows in the lower 50s. Northwest Winds around 5 Mph.
Portage Des Sioux Temperature Statistics
August Temperature
St. Charles, St. Charles County Smartt Airport (4.3 miles)
Lowest 3 August, 2025
58.6 °FAverage August
78.7 °FHighest 18 August, 2025
98.7 °F
Climate (2020–Present)
St. Charles, St. Charles County Smartt Airport (4.3 miles)
Average Low 2020–2025
47.4 °FAverage 2020–2025
57.7 °FAverage High 2020–2025
68.4 °F