Saint Marys Weather History Ontario, Canada

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
Yearly Monthly Averages
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Sun 19 Oct, 2025 Weather in Saint Marys

Sunrise: 07:44 AM Sunset: 06:34 PM	Moonrise: 05:51 AM Moonset: 05:40 PM	Max: 20.1 °c	Min: 12.1 °c	Avg: 17.0 °c	Precip: 8.40 mm	Max Wind: 42.8 kph

	Sun 19 0:00 am	Sun 19 3:00 am	Sun 19 6:00 am	Sun 19 9:00 am	Sun 19 12:00 pm	Sun 19 3:00 pm	Sun 19 6:00 pm	Sun 19 9:00 pm
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Temp	18.7°c	17.8°c	17.7°c	19.4°c	19.1°c	17.0°c	14.4°c	12.1°c
Wind	16.9 kmph	25.2 kmph	31.3 kmph	37.4 kmph	41.8 kmph	37.1 kmph	42.8 kmph	23.8 kmph
Precip	0.80 mm	0.80 mm	0.00 mm	0.00 mm	0.60 mm	0.60 mm	0.00 mm	0.00 mm
Cloud	92%	71%	79%	55%	55%	100%	100%	100%
Humidity	85%	95%	94%	85%	86%	90%	90%	94%
Pressure	1006 mb	1004 mb	1002 mb	998 mb	996 mb	996 mb	998 mb	999 mb

Saint Marys Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	-2°C / 28°F	-8°C / 17°F	-5°C / 23°F	49 hours	68.58 mm / 2.70 In	12 days	1018 mb / 31 In
February	-1°C / 30°F	-8°C / 17°F	-5°C / 24°F	61 hours	70.67 mm / 2.78 In	10 days	1018 mb / 31 In
March	5°C / 40°F	-3°C / 27°F	1°C / 33°F	108 hours	84.46 mm / 3.33 In	9 days	1018 mb / 31 In
April	11°C / 52°F	2°C / 36°F	7°C / 44°F	127 hours	112.57 mm / 4.43 In	10 days	1015 mb / 30 In
May	19°C / 66°F	9°C / 48°F	14°C / 57°F	176 hours	108.24 mm / 4.26 In	8 days	1016 mb / 30 In
June	23°C / 74°F	13°C / 56°F	18°C / 65°F	189 hours	121.82 mm / 4.80 In	9 days	1013 mb / 30 In
July	26°C / 78°F	16°C / 61°F	21°C / 70°F	208 hours	113.00 mm / 4.45 In	9 days	1014 mb / 30 In
August	25°C / 77°F	15°C / 60°F	20°C / 68°F	210 hours	90.30 mm / 3.56 In	8 days	1015 mb / 30 In
September	22°C / 72°F	12°C / 54°F	17°C / 63°F	193 hours	84.91 mm / 3.34 In	6 days	1017 mb / 31 In
October	14°C / 58°F	7°C / 44°F	11°C / 51°F	140 hours	102.14 mm / 4.02 In	9 days	1016 mb / 30 In
November	7°C / 45°F	1°C / 33°F	4°C / 39°F	126 hours	72.55 mm / 2.86 In	8 days	1018 mb / 31 In
December	2°C / 35°F	-3°C / 26°F	-1°C / 31°F	63 hours	80.88 mm / 3.18 In	11 days	1018 mb / 31 In

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