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Monthly climate in Deep River, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Deep River features a humid continental climate (Dfb). Temperatures typically range between -10 °C (14 °F) and 21 °C (70 °F) through the year, but rarely can drop to -34 °C (-30 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1082 mm (42.6 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually. Deep River enjoys an average of 2660 hours of sunshine throughout the year, and daylight varies from 8 hours 40 minutes to 15 hours 41 minutes per day.

Monthly average temperatures in Deep River, Canada

The warmest months in Deep River are June, July and August, with daily mean temperatures ranging from 17 to 21 °C (64 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -7 °C (14 - 20 °F) throughout the day. On average each year, Deep River experiences 47 days above 25 °C (77.0 °F) and 158 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Deep River. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(48°F)		10°C
(50°F)		19°C
(67°F)		26°C
(80°F)		35°C
(94°F)		35°C
(95°F)		36°C
(97°F)		33°C
(91°F)		31°C
(89°F)		26°C
(80°F)		22°C
(72°F)		15°C
(59°F)
Mean maximum3°C
(38°F)		7°C
(44°F)		11°C
(52°F)		19°C
(67°F)		30°C
(86°F)		32°C
(90°F)		33°C
(91°F)		31°C
(87°F)		28°C
(82°F)		23°C
(73°F)		14°C
(57°F)		8°C
(47°F)
Average high-6°C
(22°F)		-4°C
(26°F)		1°C
(35°F)		9°C
(48°F)		18°C
(64°F)		23°C
(74°F)		27°C
(80°F)		25°C
(76°F)		20°C
(68°F)		13°C
(55°F)		3°C
(38°F)		-3°C
(26°F)
Daily mean-10°C
(14°F)		-9°C
(16°F)		-4°C
(25°F)		4°C
(39°F)		12°C
(54°F)		17°C
(64°F)		21°C
(70°F)		19°C
(66°F)		14°C
(58°F)		8°C
(47°F)		-1°C
(31°F)		-7°C
(20°F)
Average low-15°C
(5°F)		-14°C
(7°F)		-9°C
(16°F)		-1°C
(31°F)		6°C
(43°F)		11°C
(53°F)		15°C
(59°F)		14°C
(57°F)		9°C
(49°F)		4°C
(39°F)		-4°C
(24°F)		-11°C
(12°F)
Mean minimum-28°C
(-18°F)		-27°C
(-16°F)		-23°C
(-9°F)		-9°C
(15°F)		-3°C
(28°F)		6°C
(43°F)		10°C
(50°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(26°F)		-16°C
(4°F)		-25°C
(-13°F)
Minimum-34°C
(-30°F)		-31°C
(-23°F)		-26°C
(-15°F)		-16°C
(3°F)		-4°C
(24°F)		1°C
(34°F)		9°C
(48°F)		6°C
(43°F)		-2°C
(29°F)		-8°C
(18°F)		-23°C
(-10°F)		-32°C
(-25°F)

Compare climate in Deep River with other places

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

Monthly average precipitation in Deep River, Canada

Deep River usually has the most precipitation in April, May and August, with an average of 12 rainy days and 107 mm (4.2 inches) of precipitation per month. The driest months in Deep River are January, February and March. On average, 67 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Deep River. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)61 (2.4)72 (2.8)68 (2.7)105 (4.1)107 (4.2)102 (4.0)102 (4.0)108 (4.3)94 (3.7)104 (4.1)82 (3.2)76 (3.0)
Average precipitation days (≥ 1 mm)91210121312121310141512

Monthly sunshine hours in Deep River, Canada

The sunniest months in Deep River are June, July and August, when the sun shines an average of 10 hours 29 minutes a day. Least sunny months in Deep River: January, November and December receive an average of 3 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Deep River. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours101163232222279311347306261184133116
Mean daily daylight hours9h 5m10h 21m11h 57m13h 35m14h 59m15h 41m15h 18m14h 3m12h 28m10h 51m9h 25m8h 40m

Solar UV radiation in Deep River, Canada

Deep River 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, 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 Deep River UV Index data.

Average daily maximum UV levels by month for Deep River. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)245799987532