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Monthly climate in St. John's, Canada

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification St. John's features a humid continental climate (Dfb).Temperatures typically range between -3 °C (26 °F) and 17 °C (62 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 27 °C (80 °F).The average annual precipitation amounts to about 1199 mm (47.2 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually.St. John's enjoys an average of 2438 hours of sunshine throughout the year, and daylight varies from 8 hours 30 minutes to 15 hours 52 minutes per day.

Monthly average temperatures in St. John's, Canada §

The warmest months in St. John's are July, August and September, with daily mean temperatures ranging from 13 to 17 °C (56 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -3 to -2 °C (26 - 29 °F) throughout the day. On average each year, St. John's experiences 1 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 St. John's, 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 12°C
(54°F)		 10°C
(50°F)		 13°C
(55°F)		 15°C
(60°F)		 20°C
(68°F)		 24°C
(75°F)		 25°C
(76°F)		 27°C
(80°F)		 24°C
(75°F)		 22°C
(72°F)		 16°C
(62°F)		 15°C
(59°F)
Mean maximum 8°C
(47°F)		 8°C
(46°F)		 9°C
(49°F)		 12°C
(54°F)		 16°C
(60°F)		 19°C
(67°F)		 24°C
(75°F)		 26°C
(78°F)		 23°C
(73°F)		 18°C
(65°F)		 15°C
(59°F)		 12°C
(54°F)
Average high 1°C
(33°F)		 -0°C
(32°F)		 1°C
(34°F)		 5°C
(41°F)		 8°C
(47°F)		 14°C
(57°F)		 18°C
(64°F)		 20°C
(68°F)		 16°C
(62°F)		 11°C
(52°F)		 7°C
(45°F)		 3°C
(37°F)
Daily mean -2°C
(29°F)		 -3°C
(26°F)		 -2°C
(29°F)		 2°C
(36°F)		 5°C
(41°F)		 10°C
(51°F)		 15°C
(58°F)		 17°C
(62°F)		 13°C
(56°F)		 8°C
(48°F)		 4°C
(40°F)		 0°C
(33°F)
Average low -5°C
(24°F)		 -6°C
(21°F)		 -4°C
(24°F)		 -0°C
(32°F)		 2°C
(36°F)		 7°C
(45°F)		 11°C
(53°F)		 14°C
(57°F)		 10°C
(51°F)		 6°C
(43°F)		 2°C
(36°F)		 -2°C
(29°F)
Mean minimum -11°C
(13°F)		 -14°C
(7°F)		 -10°C
(13°F)		 -4°C
(24°F)		 -1°C
(30°F)		 2°C
(35°F)		 7°C
(44°F)		 10°C
(50°F)		 5°C
(42°F)		 1°C
(35°F)		 -3°C
(26°F)		 -7°C
(19°F)
Minimum -14°C
(7°F)		 -16°C
(3°F)		 -14°C
(8°F)		 -6°C
(22°F)		 -3°C
(27°F)		 0°C
(33°F)		 6°C
(43°F)		 8°C
(46°F)		 4°C
(39°F)		 0°C
(32°F)		 -6°C
(22°F)		 -10°C
(15°F)

Compare climate in St. John's with other places

Compare temperature, precipitation, sunshine, UV index in St. John's, Canada with other places around the world.

Monthly average precipitation in St. John's, Canada §

St. John's usually has the most precipitation in January, November and December, with an average of 14 rainy days and 118 mm (4.7 inches) of precipitation per month.The driest months in St. John's are May, June and August. On average, 78 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in St. John's, 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) 113 (4.5) 102 (4.0) 100 (3.9) 103 (4.0) 80 (3.1) 86 (3.4) 100 (3.9) 69 (2.7) 107 (4.2) 97 (3.8) 108 (4.3) 133 (5.3)
Average precipitation days (≥ 1 mm) 13 12 13 14 12 12 10 10 11 12 13 16

Monthly sunshine hours in St. John's, Canada §

The sunniest months in St. John's are May, July and August, when the sun shines an average of 9 hours 22 minutes a day.Least sunny months in St. John's: January, February and December receive an average of 3 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in St. John's, 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 88 126 206 207 279 270 286 306 251 175 138 102
Mean daily daylight hours 8h 55m 10h 16m 11h 56m 13h 39m 15h 7m 15h 52m 15h 28m 14h 9m 12h 30m 10h 48m 9h 17m 8h 30m

Solar UV radiation in St. John's, Canada §

St. John's experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 10, 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 St. John's UV Index data.

Average daily maximum UV levels by month for St. John's, 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 9 8 7 4 2 1