Machens Weather Forecast
- 76
- 92
Thunderstorms
- 77
- 92
Thunderstorms
- 78
- 96
Mostly Sunny
- 77
- 97
Hot
- 71
- 93
Chance Thunderstorms
- 65
- 83
Slight Chance Thunderstorms
- 63
- 80
Partly Sunny
Today 26 Jul St. Charles
Mostly sunny with isolated Showers. Isolated Thunderstorms. Near steady temperature in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 106.
Tonight 26 Jul St. Charles
Partly cloudy this Evening, then becoming mostly cloudy. Scattered Showers and Thunderstorms. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 103 early this evening.
Machens Temperature Statistics
July Temperature
St. Charles, St. Charles County Smartt Airport (5.6 miles)
Lowest 2 July, 2025
65.6 °FAverage July
80.8 °FHighest 23 July, 2025
96.7 °F
Climate (2020–Present)
St. Charles, St. Charles County Smartt Airport (5.6 miles)
Average Low 2020–2025
47.3 °FAverage 2020–2025
57.6 °FAverage High 2020–2025
68.3 °F