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Monthly climate in Greenstone, Ontario, Canada

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Greenstone features a subarctic climate (Dfc).Temperatures typically range between -15 °C (5 °F) and 18 °C (66 °F) through the year, but rarely can drop to -42 °C (-43 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 767 mm (30.2 inches) and receives 126 rainy days on the 1 mm (0.04 inches) threshold annually.Greenstone enjoys an average of 2734 hours of sunshine throughout the year, and daylight varies from 8 hours 10 minutes to 16 hours 14 minutes per day.

Monthly average temperatures in Greenstone, Ontario, Canada §

The warmest months in Greenstone are June, July and August, with daily mean temperatures ranging from 15 to 18 °C (59 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -15 to -12 °C (5 - 11 °F) throughout the day. On average each year, Greenstone experiences 25 days above 25 °C (77.0 °F) and 189 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Greenstone, 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 4°C
(39°F)		 6°C
(44°F)		 11°C
(52°F)		 18°C
(64°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(93°F)		 31°C
(88°F)		 27°C
(80°F)		 22°C
(72°F)		 17°C
(62°F)		 7°C
(44°F)
Mean maximum 0°C
(32°F)		 2°C
(36°F)		 9°C
(48°F)		 15°C
(59°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(88°F)		 29°C
(84°F)		 24°C
(75°F)		 17°C
(63°F)		 8°C
(46°F)		 3°C
(38°F)
Average high -11°C
(13°F)		 -10°C
(15°F)		 -2°C
(29°F)		 5°C
(41°F)		 14°C
(58°F)		 21°C
(70°F)		 24°C
(76°F)		 22°C
(72°F)		 16°C
(61°F)		 8°C
(47°F)		 -1°C
(30°F)		 -8°C
(18°F)
Daily mean -15°C
(5°F)		 -15°C
(5°F)		 -8°C
(18°F)		 -1°C
(31°F)		 8°C
(47°F)		 15°C
(59°F)		 18°C
(66°F)		 16°C
(62°F)		 11°C
(53°F)		 4°C
(40°F)		 -4°C
(24°F)		 -12°C
(11°F)
Average low -20°C
(-3°F)		 -20°C
(-4°F)		 -13°C
(8°F)		 -6°C
(21°F)		 3°C
(37°F)		 9°C
(48°F)		 13°C
(55°F)		 11°C
(53°F)		 7°C
(45°F)		 1°C
(35°F)		 -7°C
(19°F)		 -16°C
(3°F)
Mean minimum -33°C
(-27°F)		 -32°C
(-26°F)		 -25°C
(-13°F)		 -16°C
(3°F)		 -5°C
(23°F)		 3°C
(38°F)		 6°C
(44°F)		 6°C
(43°F)		 -0°C
(32°F)		 -6°C
(22°F)		 -18°C
(-0°F)		 -30°C
(-22°F)
Minimum -42°C
(-43°F)		 -35°C
(-30°F)		 -28°C
(-18°F)		 -21°C
(-6°F)		 -8°C
(18°F)		 -2°C
(29°F)		 4°C
(40°F)		 4°C
(39°F)		 -2°C
(28°F)		 -10°C
(15°F)		 -26°C
(-14°F)		 -39°C
(-38°F)

Compare climate in Greenstone with other places

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

Monthly average precipitation in Greenstone, Ontario, Canada §

Greenstone usually has the most precipitation in June, September and October, with an average of 13 rainy days and 95 mm (3.7 inches) of precipitation per month.The driest months in Greenstone are January, February and March. On average, 36 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Greenstone, 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) 27 (1.1) 43 (1.7) 37 (1.4) 59 (2.3) 59 (2.3) 77 (3.0) 70 (2.8) 70 (2.8) 123 (4.8) 84 (3.3) 64 (2.5) 55 (2.2)
Average precipitation days (≥ 1 mm) 6 9 8 9 10 12 10 11 14 14 14 9

Monthly sunshine hours in Greenstone, Ontario, Canada §

The sunniest months in Greenstone are June, July and August, when the sun shines an average of 11 hours 0 minutes a day.Least sunny months in Greenstone: January, November and December receive an average of 3 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Greenstone, 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 112 178 240 266 303 332 363 315 232 162 93 130
Mean daily daylight hours 8h 39m 10h 7m 11h 56m 13h 48m 15h 24m 16h 14m 15h 46m 14h 19m 12h 32m 10h 41m 9h 2m 8h 10m

Solar UV radiation in Greenstone, Ontario, Canada §

Greenstone experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure.January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Greenstone UV Index data.

Average daily maximum UV levels by month for Greenstone, 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 3 4 7 8 9 8 8 6 4 2 1