Weather in St. Marys, Ohio
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 06:08 PM ET · Refreshes every hour
74°F
Overcast
Feels like 77°F
71%
Humidity
5 mph
Wind Speed
About Weather in St. Marys
St. Marys is located in Ohio (coordinates: 40.547565°N, 84.392335°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.