Bethalto Weather Forecast
- 70
- 81
Mostly Cloudy
- 68
- 83
Chance Thunderstorms
- 72
- 90
Chance Thunderstorms
- 69
- 87
Thunderstorms Likely
- 66
- 85
Mostly Sunny
- 73
- 88
Mostly Sunny
- 75
- 94
Mostly Sunny
Today 15 Jun Madison
Partly sunny. Near steady temperature in the lower 80s. Northeast Winds around 5 Mph.
Tonight 15 Jun Madison
Mostly cloudy with a 20 percent chance of Showers. Lows around 70. East Winds around 5 Mph.
Bethalto Temperature Statistics
June Temperature
St. Louis Regional Airport (1.2 miles)
Lowest 2 June, 2025
55.6 °FAverage June
68.3 °FHighest 3 June, 2025
86 °F
Climate (2020–Present)
St. Louis Regional Airport (1.2 miles)
Average Low 2020–2025
45.9 °FAverage 2020–2025
53.8 °FAverage High 2020–2025
65.9 °F