Climate almanac
Saint Marys
Pennsylvania, United States · 41.43°, -78.56°
What is the weather like in Saint Marys in January?
In January, Saint Marys is typically 33°F (0°C) during the day and 20°F (-7°C) at night. The month brings about 3.9 in (98 mm) of precipitation in total. Snowfall averages about 12 in (307 mm) over the month.
- Average high33°F (0°C)
- Average low20°F (-7°C)
- Precipitation3.9 in (98 mm)
- Clear or mostly clear days2
- Snowfall12 in (307 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)