Cornwall 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
Monthly Climate Data
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Mon 04 Aug, 2025 Weather in Cornwall

Sunrise: 05:48 AM Sunset: 08:21 PM	Moonrise: 05:30 PM Moonset: 12:38 AM	Max: 28.9 °c	Min: 18.2 °c	Avg: 23.3 °c	Precip: 0.00 mm	Max Wind: 12.6 kph

	Mon 04 0:00 am	Mon 04 3:00 am	Mon 04 6:00 am	Mon 04 9:00 am	Mon 04 12:00 pm	Mon 04 3:00 pm	Mon 04 6:00 pm	Mon 04 9:00 pm
Icon
Temp	21.2°c	18.8°c	19.2°c	22.5°c	27.2°c	28.8°c	26.3°c	22.1°c
Wind	12.2 kmph	11.2 kmph	6.1 kmph	0.7 kmph	4.7 kmph	6.1 kmph	9.4 kmph	4.7 kmph
Precip	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm
Cloud	15%	7%	17%	21%	17%	26%	25%	5%
Humidity	66%	77%	76%	69%	60%	53%	55%	71%
Pressure	1018 mb	1018 mb	1020 mb	1021 mb	1021 mb	1021 mb	1022 mb	1023 mb

Cornwall Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	-4°C / 24°F	-12°C / 11°F	-8°C / 18°F	76 hours	79.27 mm / 3.12 In	12 days	1016 mb / 30 In
February	-3°C / 27°F	-11°C / 12°F	-7°C / 20°F	65 hours	85.65 mm / 3.37 In	11 days	1017 mb / 31 In
March	3°C / 37°F	-5°C / 22°F	-1°C / 30°F	96 hours	103.13 mm / 4.06 In	10 days	1017 mb / 31 In
April	11°C / 51°F	1°C / 34°F	6°C / 43°F	112 hours	132.39 mm / 5.21 In	9 days	1014 mb / 30 In
May	18°C / 65°F	8°C / 46°F	13°C / 56°F	164 hours	101.59 mm / 4.00 In	9 days	1015 mb / 30 In
June	22°C / 72°F	13°C / 55°F	18°C / 64°F	171 hours	130.19 mm / 5.13 In	9 days	1012 mb / 30 In
July	26°C / 78°F	16°C / 61°F	21°C / 70°F	212 hours	116.08 mm / 4.57 In	9 days	1013 mb / 30 In
August	25°C / 77°F	15°C / 59°F	20°C / 68°F	208 hours	121.22 mm / 4.77 In	9 days	1014 mb / 30 In
September	21°C / 70°F	11°C / 52°F	16°C / 61°F	200 hours	100.37 mm / 3.95 In	7 days	1017 mb / 31 In
October	14°C / 57°F	6°C / 43°F	10°C / 49°F	134 hours	122.80 mm / 4.83 In	8 days	1016 mb / 30 In
November	6°C / 43°F	-1°C / 31°F	3°C / 37°F	127 hours	83.92 mm / 3.30 In	9 days	1018 mb / 31 In
December	0°C / 32°F	-6°C / 21°F	-3°C / 27°F	83 hours	107.09 mm / 4.22 In	12 days	1017 mb / 31 In

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