St. Marys
Southwestern Ontario, Ontario, Canada
Current Weather
15°59°
Clear
Feels Like: 4°39°
Min: 3°38°
Max: 19°65°
The next few hours will be clear, with today reaching 19°C and dropping to 6°C. The coming days will be partly cloudy starting in the afternoon.
Hourly Forecast
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Air Quality
Air quality is satisfactory, and air pollution poses little or no risk.
Daylight Hours
07:59
Sunrise
18:17
Sunset
Moon
17:49
Moonrise
07:14
Moonset
Daily Forecast
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View stargazing scoreWeather in St. Marys today, October 25, 2026
Cloud cover dominates in St. Marys on October 25, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. The morning looks comparatively open, with cloud near 6% around 11:00. Early outdoor plans have a better chance of staying dry and bright.Cloud cover dominates in St. Marys on October 25, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. The morning looks comparatively open, with cloud near 6% around 11:00. Early outdoor plans have a better chance of staying dry and bright.
Temperatures climb from an overnight low near 3°C toward a daytime high of about 19°C. Relative humidity sits between 41% and 89%, reaching its peak around 22:00. Winds stay light, near 15 km/h by 17:00, so the day feels still more than breezy.Temperatures climb from an overnight low near 38°F toward a daytime high of about 65°F. Relative humidity sits between 41% and 89%, reaching its peak around 22:00. Winds stay light, near 9 mph by 17:00, so the day feels still more than breezy.
Through the afternoon cloud remains the main feature, with cover near 100% around 16:00. Bright spells should stay limited even as the day wears on. Views remain open at about 16.1 km. Expect sunrise at 07:59, sunset at 18:17, and 10 hours 18 minutes of sunlight today overall.Through the afternoon cloud remains the main feature, with cover near 100% around 16:00. Bright spells should stay limited even as the day wears on. Views remain open at about 10 mi. Expect sunrise at 07:59, sunset at 18:17, and 10 hours 18 minutes of sunlight today overall.
Taken together, overcast skies in St. Marys on October 25, 2026 favour indoor or covered options, with temperatures near 19°C.Taken together, overcast skies in St. Marys on October 25, 2026 favour indoor or covered options, with temperatures near 65°F.
Frequently asked questions about weather in St. Marys
How warm does it get in St. Marys?
The warmest month in St. Marys is July, with average high temperatures of 27°C. The average temperature during this period is around 21°C.The warmest month in St. Marys is July, with average high temperatures of 80°F. The average temperature during this period is around 70°F.
How cold does it get in St. Marys?
The coldest month in St. Marys is January, with average low temperatures of -7°C. The average temperature during this period is around -4°C.The coldest month in St. Marys is January, with average low temperatures of 19°F. The average temperature during this period is around 24°F.
What is the wettest time of year in St. Marys?
The wettest month in St. Marys is August, with an average of 106 mm of precipitation.The wettest month in St. Marys is August, with an average of 4.2 in of precipitation.
What is the driest time of year in St. Marys?
The driest month in St. Marys is September, with an average of 73 mm of precipitation.The driest month in St. Marys is September, with an average of 2.9 in of precipitation.