Grand Lake Saint Marys State Park Weather Forecast
- 56
- 81
Mostly Sunny
- 63
- 83
Mostly Sunny
- 71
- 88
Rain Showers Likely
- 71
- 84
Rain Showers Likely
- 71
- 86
Rain Showers Likely
- 71
- 89
Chance Thunderstorms
- 72
- 88
Chance Thunderstorms
Today 26 Jul Mercer
Partly cloudy. Highs in the lower 80s. East Winds around 5 Mph.
Tonight 26 Jul Mercer
Clear. Lows in the mid 50s. East Winds around 5 Mph.
Grand Lake Saint Marys State Park Temperature Statistics
July Temperature
Versailles Darke County Airport (22.4 miles)
Lowest 2 July, 2024
51.8 °FAverage July
73.2 °FHighest 8 July, 2024
87.8 °F
Climate (2019–Present)
Versailles Darke County Airport (22.4 miles)
Average Low 2019–2024
43.3 °FAverage 2019–2024
52.2 °FAverage High 2019–2024
61.5 °F