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Monthly climate in Seaforth, Ontario, Canada

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Seaforth features a humid continental climate (Dfb).Temperatures typically range between -4 °C (25 °F) and 21 °C (70 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 1175 mm (46.3 inches) and receives 170 rainy days on the 1 mm (0.04 inches) threshold annually.Seaforth enjoys an average of 2693 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 21 minutes per day.

Monthly average temperatures in Seaforth, Ontario, Canada §

The warmest months in Seaforth are June, July and August, with daily mean temperatures ranging from 18 to 21 °C (64 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to 0 °C (25 - 32 °F) throughout the day. On average each year, Seaforth experiences 28 days above 25 °C (77.0 °F) and 117 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Seaforth, Ontario, 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 10°C
(51°F)		 13°C
(56°F)		 16°C
(62°F)		 22°C
(71°F)		 28°C
(82°F)		 29°C
(85°F)		 30°C
(87°F)		 29°C
(85°F)		 29°C
(84°F)		 26°C
(79°F)		 20°C
(69°F)		 14°C
(58°F)
Mean maximum 7°C
(45°F)		 9°C
(49°F)		 14°C
(57°F)		 19°C
(67°F)		 25°C
(78°F)		 27°C
(81°F)		 29°C
(84°F)		 28°C
(83°F)		 27°C
(81°F)		 24°C
(75°F)		 14°C
(58°F)		 11°C
(52°F)
Average high -1°C
(30°F)		 -1°C
(31°F)		 4°C
(39°F)		 9°C
(48°F)		 15°C
(60°F)		 21°C
(70°F)		 24°C
(76°F)		 24°C
(75°F)		 21°C
(70°F)		 14°C
(58°F)		 6°C
(43°F)		 2°C
(36°F)
Daily mean -4°C
(25°F)		 -4°C
(26°F)		 0°C
(33°F)		 5°C
(41°F)		 12°C
(53°F)		 18°C
(64°F)		 21°C
(70°F)		 20°C
(69°F)		 17°C
(63°F)		 11°C
(52°F)		 3°C
(38°F)		 -0°C
(32°F)
Average low -6°C
(21°F)		 -7°C
(20°F)		 -3°C
(27°F)		 2°C
(35°F)		 8°C
(46°F)		 14°C
(57°F)		 17°C
(63°F)		 17°C
(62°F)		 13°C
(56°F)		 8°C
(47°F)		 1°C
(34°F)		 -3°C
(28°F)
Mean minimum -15°C
(5°F)		 -15°C
(6°F)		 -11°C
(12°F)		 -4°C
(26°F)		 0°C
(33°F)		 9°C
(48°F)		 12°C
(54°F)		 11°C
(52°F)		 7°C
(44°F)		 1°C
(35°F)		 -7°C
(19°F)		 -9°C
(16°F)
Minimum -20°C
(-4°F)		 -19°C
(-3°F)		 -14°C
(6°F)		 -5°C
(23°F)		 -2°C
(29°F)		 5°C
(41°F)		 11°C
(52°F)		 8°C
(47°F)		 3°C
(37°F)		 1°C
(33°F)		 -11°C
(13°F)		 -17°C
(2°F)

Compare climate in Seaforth with other places

Compare temperature, precipitation, sunshine, UV index in Seaforth, Ontario, Canada with other places around the world.

Monthly average precipitation in Seaforth, Ontario, Canada §

Seaforth usually has the most precipitation in August, October and November, with an average of 15 rainy days and 122 mm (4.8 inches) of precipitation per month.The driest months in Seaforth are January, March and July. On average, 81 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Seaforth, Ontario, 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) 85 (3.4) 90 (3.5) 78 (3.1) 104 (4.1) 97 (3.8) 91 (3.6) 79 (3.1) 115 (4.5) 99 (3.9) 136 (5.3) 115 (4.5) 88 (3.5)
Average precipitation days (≥ 1 mm) 15 15 14 15 13 11 11 13 12 16 18 17

Monthly sunshine hours in Seaforth, Ontario, Canada §

The sunniest months in Seaforth are June, July and August, when the sun shines an average of 11 hours 0 minutes a day.Least sunny months in Seaforth: January, November and December receive an average of 3 hours 22 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Seaforth, Ontario, 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 78 131 219 234 294 334 349 329 290 200 130 101
Mean daily daylight hours 9h 21m 10h 30m 11h 58m 13h 27m 14h 43m 15h 21m 15h 0m 13h 52m 12h 26m 10h 57m 9h 39m 8h 59m

Solar UV radiation in Seaforth, Ontario, Canada §

Seaforth experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November 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 Seaforth UV Index data.

Average daily maximum UV levels by month for Seaforth, Ontario, 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 4 5 8 9 10 9 9 7 5 3 2