Granite City Weather Forecast
- 44
- 75
Sunny
- 57
- 77
Partly Sunny
- 56
- 79
Partly Sunny
- 60
- 83
Partly Sunny
- 60
- 81
Partly Sunny
- 59
- 82
Mostly Sunny
Today 9 Oct Madison
Sunny. Highs in the lower 70s. East Winds around 5 Mph.
Tonight 9 Oct Madison
Clear. Lows in the lower 40s. Southeast Winds around 5 Mph.
Granite City Temperature Statistics
October Temperature
St. Louis Downtown Airport (9.3 miles)
Lowest 5 October, 2025
55 °FAverage October
72 °FHighest 3 October, 2025
90 °F
Climate (2020–Present)
St. Louis Downtown Airport (9.3 miles)
Average Low 2020–2025
47.4 °FAverage 2020–2025
58 °FAverage High 2020–2025
68.6 °F