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Monthly climate in Cornwall, Prince Edward Island, Canada

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Cornwall features a humid continental climate (Dfb).Temperatures typically range between -5 °C (22 °F) and 20 °C (68 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 30 °C (86 °F).The average annual precipitation amounts to about 1067 mm (42.0 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually.Cornwall enjoys an average of 2811 hours of sunshine throughout the year, and daylight varies from 8 hours 39 minutes to 15 hours 42 minutes per day.

Monthly average temperatures in Cornwall, Prince Edward Island, Canada §

The warmest months in Cornwall are July, August and September, with daily mean temperatures ranging from 16 to 20 °C (61 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -5 to -2 °C (22 - 28 °F) throughout the day. On average each year, Cornwall experiences 21 days above 25 °C (77.0 °F) and 131 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Cornwall, Prince Edward Island, Canada.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(58°F)		 9°C
(49°F)		 11°C
(53°F)		 18°C
(65°F)		 24°C
(76°F)		 29°C
(84°F)		 30°C
(85°F)		 30°C
(86°F)		 27°C
(82°F)		 24°C
(75°F)		 20°C
(68°F)		 14°C
(58°F)
Mean maximum 9°C
(48°F)		 7°C
(45°F)		 9°C
(48°F)		 17°C
(62°F)		 22°C
(72°F)		 24°C
(75°F)		 28°C
(83°F)		 29°C
(85°F)		 26°C
(78°F)		 21°C
(69°F)		 18°C
(65°F)		 12°C
(55°F)
Average high -2°C
(29°F)		 -2°C
(29°F)		 1°C
(34°F)		 7°C
(45°F)		 13°C
(56°F)		 19°C
(67°F)		 23°C
(74°F)		 24°C
(75°F)		 19°C
(67°F)		 13°C
(56°F)		 7°C
(45°F)		 1°C
(34°F)
Daily mean -5°C
(23°F)		 -5°C
(22°F)		 -2°C
(28°F)		 4°C
(39°F)		 9°C
(49°F)		 15°C
(60°F)		 20°C
(67°F)		 20°C
(68°F)		 16°C
(61°F)		 10°C
(50°F)		 4°C
(39°F)		 -2°C
(29°F)
Average low -9°C
(16°F)		 -9°C
(15°F)		 -6°C
(22°F)		 1°C
(34°F)		 5°C
(42°F)		 11°C
(53°F)		 16°C
(61°F)		 16°C
(62°F)		 12°C
(54°F)		 7°C
(45°F)		 1°C
(33°F)		 -5°C
(23°F)
Mean minimum -18°C
(-1°F)		 -18°C
(-0°F)		 -15°C
(5°F)		 -5°C
(24°F)		 0°C
(33°F)		 5°C
(41°F)		 11°C
(53°F)		 12°C
(53°F)		 5°C
(41°F)		 1°C
(35°F)		 -7°C
(20°F)		 -13°C
(8°F)
Minimum -20°C
(-3°F)		 -20°C
(-4°F)		 -19°C
(-2°F)		 -8°C
(18°F)		 -3°C
(27°F)		 0°C
(33°F)		 11°C
(52°F)		 11°C
(51°F)		 3°C
(38°F)		 -2°C
(29°F)		 -12°C
(10°F)		 -19°C
(-3°F)

Compare climate in Cornwall with other places

Compare temperature, precipitation, sunshine, UV index in Cornwall, Prince Edward Island, Canada with other places around the world.

Monthly average precipitation in Cornwall, Prince Edward Island, Canada §

Cornwall usually has the most precipitation in June, November and December, with an average of 13 rainy days and 110 mm (4.3 inches) of precipitation per month.The driest months in Cornwall are March, July and August. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Cornwall, Prince Edward Island, Canada.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 81 (3.2) 93 (3.7) 75 (2.9) 85 (3.4) 88 (3.5) 97 (3.8) 68 (2.7) 73 (2.9) 96 (3.8) 77 (3.0) 135 (5.3) 97 (3.8)
Average precipitation days (≥ 1 mm) 10 12 13 12 13 12 10 10 10 11 15 13

Monthly sunshine hours in Cornwall, Prince Edward Island, Canada §

The sunniest months in Cornwall are June, July and August, when the sun shines an average of 11 hours 5 minutes a day.Least sunny months in Cornwall: January, November and December receive an average of 3 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Cornwall, Prince Edward Island, Canada.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 97 170 228 243 295 328 341 351 270 220 142 122
Mean daily daylight hours 9h 4m 10h 20m 11h 57m 13h 35m 14h 59m 15h 42m 15h 19m 14h 4m 12h 29m 10h 51m 9h 24m 8h 39m

Solar UV radiation in Cornwall, Prince Edward Island, Canada §

Cornwall experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 8 - 10, which corresponds to the Very High category of sun exposure.January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Cornwall UV Index data.

Average daily maximum UV levels by month for Cornwall, Prince Edward Island, Canada.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 3 5 7 8 10 8 8 7 5 3 2