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Monthly climate in Mississauga, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mississauga 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. Mississauga 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 Mississauga, Canada

The warmest months in Mississauga 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, Mississauga 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 Mississauga. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°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 maximum9°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 Mississauga with other places

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

Monthly average precipitation in Mississauga, Canada

Mississauga 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 Mississauga 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 Mississauga. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
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)813913121112119131012

Monthly sunshine hours in Mississauga, Canada

The sunniest months in Mississauga are June, July and August, when the sun shines an average of 11 hours 14 minutes a day. Least sunny months in Mississauga: 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 Mississauga. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours112156230239293339350344306203153118
Mean daily daylight hours9h 22m10h 30m11h 57m13h 26m14h 42m15h 20m14h 59m13h 52m12h 26m10h 57m9h 40m9h 0m

Solar UV radiation in Mississauga, Canada

Mississauga 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 Mississauga UV Index data.

Average daily maximum UV levels by month for Mississauga. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)245899997532