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Monthly climate in Oakville, Ontario, Canada

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Oakville features a humid continental climate (Dfb).Temperatures typically range between -3 °C (26 °F) and 22 °C (72 °F) through the year, but rarely can drop to -22 °C (-8 °F) or can rise to as high as 32 °C (91 °F).The average annual precipitation amounts to about 992 mm (39.1 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually.Oakville enjoys an average of 2848 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Oakville, Ontario, Canada §

The warmest months in Oakville are June, July and August, with daily mean temperatures ranging from 18 to 22 °C (65 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 0 °C (26 - 32 °F) throughout the day. On average each year, Oakville experiences 43 days above 25 °C (77.0 °F) and 104 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Oakville, 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 12°C
(53°F)		 15°C
(59°F)		 17°C
(63°F)		 20°C
(68°F)		 29°C
(84°F)		 30°C
(87°F)		 32°C
(91°F)		 31°C
(89°F)		 31°C
(88°F)		 28°C
(82°F)		 20°C
(69°F)		 15°C
(59°F)
Mean maximum 9°C
(48°F)		 11°C
(51°F)		 15°C
(59°F)		 17°C
(62°F)		 27°C
(80°F)		 28°C
(84°F)		 31°C
(87°F)		 30°C
(86°F)		 29°C
(84°F)		 25°C
(77°F)		 16°C
(60°F)		 11°C
(52°F)
Average high -0°C
(32°F)		 1°C
(34°F)		 5°C
(41°F)		 9°C
(49°F)		 16°C
(61°F)		 22°C
(72°F)		 26°C
(79°F)		 25°C
(78°F)		 22°C
(71°F)		 15°C
(59°F)		 7°C
(45°F)		 2°C
(36°F)
Daily mean -3°C
(26°F)		 -3°C
(27°F)		 1°C
(34°F)		 6°C
(43°F)		 12°C
(54°F)		 18°C
(65°F)		 22°C
(72°F)		 22°C
(71°F)		 18°C
(64°F)		 12°C
(53°F)		 4°C
(39°F)		 -0°C
(32°F)
Average low -6°C
(21°F)		 -6°C
(21°F)		 -3°C
(28°F)		 2°C
(37°F)		 8°C
(47°F)		 14°C
(58°F)		 18°C
(65°F)		 18°C
(65°F)		 14°C
(58°F)		 9°C
(48°F)		 1°C
(34°F)		 -3°C
(27°F)
Mean minimum -17°C
(1°F)		 -16°C
(4°F)		 -12°C
(11°F)		 -2°C
(28°F)		 2°C
(35°F)		 10°C
(50°F)		 15°C
(58°F)		 13°C
(56°F)		 9°C
(48°F)		 2°C
(36°F)		 -8°C
(17°F)		 -12°C
(11°F)
Minimum -22°C
(-8°F)		 -20°C
(-4°F)		 -17°C
(2°F)		 -4°C
(25°F)		 -1°C
(30°F)		 6°C
(44°F)		 13°C
(56°F)		 11°C
(52°F)		 6°C
(42°F)		 -0°C
(32°F)		 -15°C
(6°F)		 -21°C
(-6°F)

Compare climate in Oakville with other places

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

Monthly average precipitation in Oakville, Ontario, Canada §

Oakville usually has the most precipitation in April, May and October, with an average of 12 rainy days and 105 mm (4.1 inches) of precipitation per month.The driest months in Oakville are January, March and September. On average, 67 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Oakville, 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) 73 (2.9) 80 (3.2) 64 (2.5) 110 (4.3) 98 (3.9) 88 (3.5) 75 (2.9) 77 (3.0) 63 (2.5) 108 (4.3) 79 (3.1) 78 (3.1)
Average precipitation days (≥ 1 mm) 8 13 9 13 12 11 12 11 9 13 10 12

Monthly sunshine hours in Oakville, Ontario, Canada §

The sunniest months in Oakville are June, July and August, when the sun shines an average of 11 hours 14 minutes a day.Least sunny months in Oakville: January, November and December receive an average of 4 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Oakville, 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 112 156 230 239 293 339 350 344 306 203 153 118
Mean daily daylight hours 9h 22m 10h 30m 11h 57m 13h 26m 14h 42m 15h 20m 14h 59m 13h 52m 12h 26m 10h 57m 9h 40m 9h 0m

Solar UV radiation in Oakville, Ontario, Canada §

Oakville experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 9 - 9, 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 Oakville UV Index data.

Average daily maximum UV levels by month for Oakville, 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 9 9 9 7 5 3 2