Alton Weather Forecast
- 57
- 78
Partly Sunny
- 56
- 81
Rain
- 37
- 68
Partly Sunny
- 36
- 51
Mostly Sunny
- 53
- 70
Mostly Sunny
- 55
- 76
Mostly Cloudy
Today 13 Mar Madison
Mostly sunny. Highs in the upper 70s. East Winds 5 to 10 Mph.
Tonight 13 Mar Madison
Mostly clear. Not as cool with Lows around 50. East Winds around 5 Mph.
Alton Temperature Statistics
March Temperature
St. Louis Regional Airport (8.1 miles)
Lowest 2 March, 2025
19 °FAverage March
40.7 °FHighest 10 March, 2025
71.6 °F
Climate (2020–Present)
St. Louis Regional Airport (8.1 miles)
Average Low 2020–2025
45.8 °FAverage 2020–2025
53.7 °FAverage High 2020–2025
65.7 °F