Alton Weather Forecast
- 40
- 62
Becoming Sunny
- 43
- 64
Increasing Clouds
- 57
- 69
Rain Showers Likely
- 60
- 79
Rain Showers Likely
- 59
- 75
Rain Showers Likely
- 41
- 75
Rain Showers Likely
- 36
- 54
Mostly Cloudy
Today 25 Mar Madison
Mostly sunny. Near steady temperature in the lower 60s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.
Tonight 25 Mar Madison
Mostly cloudy this Evening, then clearing. Lows in the upper 30s. North Winds 5 to 10 Mph, becoming southwest after midnight.
Alton Temperature Statistics
March Temperature
St. Louis Regional Airport (8.1 miles)
Lowest 2 March, 2025
19 °FAverage March
46.6 °FHighest 14 March, 2025
80.6 °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
65.9 °F