Climate almanac
Saint Marys
Ohio, United States · 40.54°, -84.39°
What is the weather like in Saint Marys in December?
In December, Saint Marys is typically 42°F (6°C) during the day and 29°F (-2°C) at night. The month brings about 2.8 in (72 mm) of precipitation in total. Snowfall averages about 2.9 in (75 mm) over the month.
- Average high42°F (6°C)
- Average low29°F (-2°C)
- Precipitation2.8 in (72 mm)
- Clear or mostly clear days5
- Snowfall2.9 in (75 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)