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Monthly climate in Mattawa, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mattawa features a humid continental climate (Dfb). Temperatures typically range between -11 °C (13 °F) and 20 °C (68 °F) through the year, but rarely can drop to -36 °C (-33 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1072 mm (42.2 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually. Mattawa enjoys an average of 2586 hours of sunshine throughout the year, and daylight varies from 8 hours 39 minutes to 15 hours 43 minutes per day.

Monthly average temperatures in Mattawa, Canada

The warmest months in Mattawa are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (62 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -11 to -7 °C (13 - 19 °F) throughout the day. On average each year, Mattawa experiences 43 days above 25 °C (77.0 °F) and 163 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mattawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		9°C
(48°F)		19°C
(67°F)		28°C
(83°F)		35°C
(96°F)		32°C
(91°F)		35°C
(96°F)		31°C
(88°F)		31°C
(88°F)		26°C
(79°F)		23°C
(74°F)		16°C
(60°F)
Mean maximum4°C
(39°F)		6°C
(43°F)		11°C
(52°F)		21°C
(70°F)		30°C
(86°F)		31°C
(88°F)		32°C
(89°F)		30°C
(85°F)		28°C
(82°F)		23°C
(73°F)		14°C
(57°F)		7°C
(46°F)
Average high-6°C
(21°F)		-4°C
(25°F)		1°C
(34°F)		9°C
(48°F)		17°C
(64°F)		22°C
(73°F)		26°C
(79°F)		24°C
(75°F)		19°C
(67°F)		12°C
(54°F)		3°C
(37°F)		-4°C
(26°F)
Daily mean-11°C
(13°F)		-10°C
(15°F)		-4°C
(24°F)		3°C
(38°F)		11°C
(53°F)		17°C
(62°F)		20°C
(68°F)		18°C
(65°F)		14°C
(57°F)		7°C
(46°F)		-1°C
(31°F)		-7°C
(19°F)
Average low-16°C
(4°F)		-15°C
(6°F)		-10°C
(15°F)		-1°C
(30°F)		5°C
(41°F)		10°C
(50°F)		14°C
(58°F)		13°C
(56°F)		9°C
(48°F)		3°C
(38°F)		-4°C
(24°F)		-11°C
(12°F)
Mean minimum-31°C
(-23°F)		-29°C
(-21°F)		-24°C
(-11°F)		-10°C
(14°F)		-4°C
(26°F)		4°C
(40°F)		8°C
(48°F)		7°C
(45°F)		1°C
(34°F)		-4°C
(25°F)		-15°C
(5°F)		-26°C
(-14°F)
Minimum-36°C
(-33°F)		-33°C
(-27°F)		-29°C
(-20°F)		-18°C
(0°F)		-6°C
(22°F)		0°C
(33°F)		7°C
(44°F)		4°C
(40°F)		-3°C
(27°F)		-9°C
(16°F)		-20°C
(-4°F)		-34°C
(-28°F)

Compare climate in Mattawa with other places

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

Monthly average precipitation in Mattawa, Canada

Mattawa usually has the most precipitation in June, August and September, with an average of 12 rainy days and 109 mm (4.3 inches) of precipitation per month. The driest months in Mattawa are January, February and March. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mattawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)55 (2.2)66 (2.6)61 (2.4)99 (3.9)103 (4.1)106 (4.2)95 (3.7)116 (4.6)105 (4.2)103 (4.0)86 (3.4)76 (3.0)
Average precipitation days (≥ 1 mm)91311131112111412141414

Monthly sunshine hours in Mattawa, Canada

The sunniest months in Mattawa are June, July and August, when the sun shines an average of 10 hours 13 minutes a day. Least sunny months in Mattawa: January, November and December receive an average of 3 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mattawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours94157233223272305337297251176120114
Mean daily daylight hours9h 3m10h 20m11h 57m13h 36m15h 0m15h 43m15h 19m14h 4m12h 29m10h 50m9h 24m8h 39m

Solar UV radiation in Mattawa, Canada

Mattawa experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 9, 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 3. For more detailed information, check out our hourly Mattawa UV Index data.

Average daily maximum UV levels by month for Mattawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235799987532