Maple Island Conservation Area Weather Forecast
- 60
- 77
Slight Chance Rain Showers
- 66
- 84
Partly Sunny
- 67
- 86
Rain Showers Likely
- 66
- 84
Rain Showers
- 60
- 79
Partly Sunny
- 62
- 80
Partly Sunny
Today 18 Jun St. Charles
Mostly cloudy with a chance of Showers with isolated Thunderstorms. Cooler. Near steady temperature in the mid 70s. Northwest Winds 5 to 10 Mph. Chance of rain 40 percent.
Tonight 18 Jun St. Charles
Mostly cloudy with a slight chance of Showers with isolated Thunderstorms in the Evening, then partly cloudy after midnight. Cooler with Lows in the upper 50s. Northwest Winds 5 to 10 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.
Maple Island Conservation Area Temperature Statistics
June Temperature
St. Louis Regional Airport (6.2 miles)
Lowest 3 June, 2026
52.5 °FAverage June
72.6 °FHighest 9 June, 2026
91.4 °F
Climate (2021–2026)
St. Louis Regional Airport (6.2 miles)
Average Low 2021–2026
46.5 °FAverage 2021–2026
54.5 °FAverage High 2021–2026
66.7 °F