St. Mary's Weather Forecast
- 66
- 87
Decreasing Clouds
- 61
- 81
Mostly Sunny
- 62
- 82
Partly Sunny
- 72
- 89
Partly Sunny
- 65
- 90
Partly Sunny
- 60
- 82
Partly Sunny
- 62
- 82
Partly Sunny
Today 5 Sep Northern Will
Partly cloudy. Temperatures in the lower 80s. Northeast Winds around 10 Mph.
Tonight 5 Sep Northern Will
Partly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.
St. Mary's Temperature Statistics
September Temperature
Lewis University Airport (4.3 miles)
Lowest 1 September, 2026
74.6 °FAverage September
83.1 °FHighest 2 September, 2026
94.6 °F
Climate (2021–2026)
Lewis University Airport (4.3 miles)
Average Low 2021–2026
43.6 °FAverage 2021–2026
52.5 °FAverage High 2021–2026
61.9 °F