Monthly climate in St. George, Ontario, Canada

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification St. George features a humid continental climate (Dfb). Temperatures typically range between -4 °C (25 °F) and 22 °C (72 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 997 mm (39.2 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually. St. George enjoys an average of 2803 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in St. George, Ontario, Canada §

The warmest months in St. George are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (67 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, St. George experiences 56 days above 25 °C (77.0 °F) and 124 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. George, 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 13°C
(56°F)
18°C
(64°F)
20°C
(68°F)
26°C
(79°F)
32°C
(91°F)
33°C
(92°F)
33°C
(92°F)
32°C
(90°F)
32°C
(90°F)
29°C
(85°F)
22°C
(72°F)
16°C
(61°F)
Mean maximum 10°C
(50°F)
12°C
(54°F)
18°C
(64°F)
22°C
(72°F)
30°C
(86°F)
31°C
(88°F)
32°C
(89°F)
30°C
(87°F)
29°C
(85°F)
26°C
(79°F)
16°C
(61°F)
12°C
(54°F)
Average high -1°C
(31°F)
1°C
(33°F)
5°C
(42°F)
11°C
(52°F)
19°C
(66°F)
24°C
(76°F)
27°C
(81°F)
26°C
(79°F)
22°C
(73°F)
15°C
(60°F)
7°C
(44°F)
2°C
(36°F)
Daily mean -4°C
(25°F)
-4°C
(26°F)
1°C
(33°F)
6°C
(44°F)
14°C
(57°F)
19°C
(67°F)
22°C
(72°F)
21°C
(70°F)
17°C
(63°F)
11°C
(52°F)
3°C
(38°F)
-1°C
(30°F)
Average low -8°C
(18°F)
-8°C
(18°F)
-4°C
(25°F)
2°C
(36°F)
8°C
(47°F)
14°C
(57°F)
17°C
(63°F)
16°C
(61°F)
12°C
(54°F)
7°C
(44°F)
-1°C
(31°F)
-4°C
(25°F)
Mean minimum -21°C
(-6°F)
-19°C
(-3°F)
-15°C
(6°F)
-4°C
(24°F)
-0°C
(32°F)
8°C
(47°F)
12°C
(54°F)
10°C
(50°F)
5°C
(41°F)
-2°C
(29°F)
-12°C
(11°F)
-14°C
(7°F)
Minimum -27°C
(-16°F)
-24°C
(-11°F)
-23°C
(-8°F)
-6°C
(21°F)
-4°C
(26°F)
5°C
(40°F)
10°C
(50°F)
7°C
(45°F)
1°C
(34°F)
-3°C
(28°F)
-20°C
(-4°F)
-26°C
(-15°F)

Compare climate in St. George with other places

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

Monthly average precipitation in St. George, Ontario, Canada §

St. George usually has the most precipitation in April, June and October, with an average of 12 rainy days and 100 mm (4.0 inches) of precipitation per month. The driest months in St. George are January, March and December. On average, 68 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in St. George, 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) 70 (2.7) 74 (2.9) 65 (2.6) 98 (3.9) 97 (3.8) 103 (4.1) 82 (3.2) 90 (3.5) 71 (2.8) 100 (3.9) 75 (3.0) 70 (2.8)
Average precipitation days (≥ 1 mm) 8 12 9 13 12 11 12 11 10 13 11 11

Monthly sunshine hours in St. George, Ontario, Canada §

The sunniest months in St. George are June, July and August, when the sun shines an average of 11 hours 4 minutes a day. Least sunny months in St. George: January, November and December receive an average of 4 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in St. George, 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 106 151 231 239 289 335 347 335 295 204 150 116
Mean daily daylight hours 9h 23m 10h 31m 11h 57m 13h 26m 14h 41m 15h 18m 14h 58m 13h 51m 12h 26m 10h 58m 9h 41m 9h 1m

Solar UV radiation in St. George, Ontario, Canada §

St. George 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, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly St. George UV Index data.

Average daily maximum UV levels by month for St. George, 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 4 2

Detailed Monthly Weather Insights for St. George, Ontario, Canada

Discover in-depth weather details for every month in St. George. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about St. George's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.