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Monthly climate in Gravenhurst, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Gravenhurst features a humid continental climate (Dfb). Temperatures typically range between -8 °C (18 °F) and 20 °C (69 °F) through the year, but rarely can drop to -31 °C (-24 °F) or can rise to as high as 34 °C (93 °F). The average annual precipitation amounts to about 1217 mm (47.9 inches) and receives 163 rainy days on the 1 mm (0.04 inches) threshold annually. Gravenhurst enjoys an average of 2686 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 32 minutes per day.

Monthly average temperatures in Gravenhurst, Canada

The warmest months in Gravenhurst are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (63 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -8 to -4 °C (18 - 24 °F) throughout the day. On average each year, Gravenhurst experiences 35 days above 25 °C (77.0 °F) and 144 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Gravenhurst. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(47°F)		11°C
(52°F)		16°C
(61°F)		25°C
(78°F)		31°C
(88°F)		30°C
(87°F)		34°C
(93°F)		31°C
(88°F)		30°C
(85°F)		26°C
(79°F)		21°C
(70°F)		16°C
(61°F)
Mean maximum4°C
(40°F)		7°C
(45°F)		11°C
(51°F)		20°C
(68°F)		28°C
(82°F)		29°C
(84°F)		30°C
(87°F)		29°C
(84°F)		27°C
(81°F)		23°C
(73°F)		14°C
(57°F)		8°C
(48°F)
Average high-4°C
(25°F)		-3°C
(28°F)		2°C
(35°F)		9°C
(48°F)		17°C
(62°F)		22°C
(71°F)		25°C
(77°F)		24°C
(75°F)		20°C
(68°F)		13°C
(56°F)		4°C
(40°F)		-1°C
(30°F)
Daily mean-8°C
(18°F)		-7°C
(20°F)		-3°C
(27°F)		4°C
(40°F)		11°C
(53°F)		17°C
(63°F)		20°C
(69°F)		19°C
(67°F)		15°C
(59°F)		9°C
(49°F)		1°C
(34°F)		-4°C
(24°F)
Average low-12°C
(10°F)		-11°C
(12°F)		-7°C
(19°F)		-0°C
(32°F)		6°C
(43°F)		12°C
(53°F)		16°C
(60°F)		15°C
(59°F)		11°C
(51°F)		5°C
(42°F)		-2°C
(28°F)		-8°C
(18°F)
Mean minimum-26°C
(-14°F)		-23°C
(-9°F)		-20°C
(-3°F)		-7°C
(19°F)		-1°C
(30°F)		7°C
(44°F)		11°C
(52°F)		10°C
(49°F)		4°C
(40°F)		-2°C
(29°F)		-13°C
(8°F)		-20°C
(-4°F)
Minimum-31°C
(-24°F)		-28°C
(-18°F)		-22°C
(-7°F)		-13°C
(9°F)		-4°C
(26°F)		3°C
(37°F)		10°C
(51°F)		8°C
(47°F)		2°C
(36°F)		-5°C
(23°F)		-18°C
(1°F)		-30°C
(-21°F)

Compare climate in Gravenhurst with other places

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

Monthly average precipitation in Gravenhurst, Canada

Gravenhurst usually has the most precipitation in June, August and September, with an average of 13 rainy days and 124 mm (4.9 inches) of precipitation per month. The driest months in Gravenhurst are January, February and March. On average, 75 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Gravenhurst. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)83 (3.3)70 (2.7)113 (4.4)103 (4.0)119 (4.7)102 (4.0)138 (5.4)114 (4.5)107 (4.2)105 (4.1)92 (3.6)
Average precipitation days (≥ 1 mm)121510141212131413161715

Monthly sunshine hours in Gravenhurst, Canada

The sunniest months in Gravenhurst are June, July and August, when the sun shines an average of 10 hours 35 minutes a day. Least sunny months in Gravenhurst: January, November and December receive an average of 3 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Gravenhurst. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours99152229224281312346316277190140116
Mean daily daylight hours9h 12m10h 25m11h 57m13h 31m14h 52m15h 32m15h 10m13h 58m12h 27m10h 54m9h 31m8h 48m

Solar UV radiation in Gravenhurst, Canada

Gravenhurst 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 Gravenhurst UV Index data.

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