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	Area Conditions for St Marys, ON

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As reported at HPSTS St Mary's, ON at 6:00 AM

	5-day Forecast for St Marys, ON

Date	Wed 15 Jul	Thu 16 Jul	Fri 17 Jul	Sat 18 Jul	Sun 19 Jul
Weather Condition
Weather	Partly Cloudy	Mostly Cloudy	Thunder Storms	Thunder Storms	Thunder Storms
Temperature (°C) Low/High	22/31	18/28	17/28	18/27	17/27
Feels Like (°C) Low/High	22/31	18/28	17/28	18/28	17/27
Dew Point (°C)	17	14	16	17	17
Humidity (%)	50	51	53	71	64
Wind Speed (kph)	13	16	6	10	11
Precipitation Chance (%)	-	-	63	60	71
Precipitation Amount (cm) S=Snow, L=Liquid	None	None	Rain 0.20	Rain 1.47	Rain 0.23
Evapo- transpiration (cm/day)	0.69	0.64	0.46	0.38	0.46

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Bryce Anderson – DTN Meteorologist

Posted at 12:00PM Tue Jul 14, 2026 CDT

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