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Monthly climate in Nanaimo, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Nanaimo features a oceanic climate (Cfb). Temperatures typically range between 3 °C (38 °F) and 19 °C (66 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 1778 mm (70.0 inches) and receives 164 rainy days on the 1 mm (0.04 inches) threshold annually. Nanaimo enjoys an average of 2608 hours of sunshine throughout the year, and daylight varies from 8 hours 15 minutes to 16 hours 8 minutes per day.

Monthly average temperatures in Nanaimo, Canada

The warmest months in Nanaimo are June, July and August, with daily mean temperatures ranging from 15 to 19 °C (60 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 4 °C (38 - 40 °F) throughout the day. On average each year, Nanaimo experiences 3 days above 25 °C (77.0 °F) and 11 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nanaimo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum9°C
(49°F)		9°C
(49°F)		15°C
(59°F)		18°C
(65°F)		22°C
(71°F)		30°C
(86°F)		27°C
(81°F)		27°C
(81°F)		25°C
(78°F)		19°C
(67°F)		12°C
(55°F)		10°C
(50°F)
Mean maximum9°C
(48°F)		9°C
(48°F)		11°C
(52°F)		15°C
(58°F)		19°C
(67°F)		23°C
(73°F)		25°C
(77°F)		26°C
(79°F)		22°C
(73°F)		16°C
(61°F)		12°C
(53°F)		9°C
(49°F)
Average high6°C
(42°F)		5°C
(41°F)		7°C
(45°F)		10°C
(50°F)		14°C
(58°F)		17°C
(63°F)		20°C
(69°F)		21°C
(70°F)		17°C
(63°F)		12°C
(53°F)		8°C
(47°F)		6°C
(42°F)
Daily mean4°C
(40°F)		3°C
(38°F)		6°C
(42°F)		8°C
(47°F)		12°C
(55°F)		15°C
(60°F)		18°C
(65°F)		19°C
(66°F)		15°C
(60°F)		10°C
(50°F)		7°C
(45°F)		4°C
(40°F)
Average low3°C
(38°F)		2°C
(36°F)		4°C
(40°F)		7°C
(44°F)		10°C
(51°F)		13°C
(56°F)		16°C
(60°F)		17°C
(62°F)		14°C
(57°F)		9°C
(48°F)		6°C
(43°F)		3°C
(38°F)
Mean minimum-2°C
(29°F)		-3°C
(27°F)		1°C
(33°F)		3°C
(38°F)		7°C
(44°F)		10°C
(50°F)		13°C
(55°F)		13°C
(57°F)		10°C
(50°F)		5°C
(41°F)		2°C
(36°F)		-1°C
(31°F)
Minimum-5°C
(23°F)		-5°C
(23°F)		-1°C
(30°F)		2°C
(36°F)		4°C
(40°F)		8°C
(47°F)		11°C
(53°F)		12°C
(54°F)		9°C
(49°F)		3°C
(37°F)		1°C
(33°F)		-7°C
(20°F)

Compare climate in Nanaimo with other places

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

Monthly average precipitation in Nanaimo, Canada

Nanaimo usually has the most precipitation in January, November and December, with an average of 18 rainy days and 268 mm (10.6 inches) of precipitation per month. The driest months in Nanaimo are May, July and August. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nanaimo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)249 (9.8)147 (5.8)136 (5.3)126 (5.0)70 (2.7)70 (2.8)33 (1.3)40 (1.6)158 (6.2)194 (7.6)304 (12.0)252 (9.9)
Average precipitation days (≥ 1 mm)1716151511126513161820

Monthly sunshine hours in Nanaimo, Canada

The sunniest months in Nanaimo are June, July and August, when the sun shines an average of 11 hours 22 minutes a day. Least sunny months in Nanaimo: January, November and December receive an average of 2 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nanaimo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours7213219622732032937833924017310988
Mean daily daylight hours8h 43m10h 10m11h 56m13h 46m15h 20m16h 8m15h 41m14h 16m12h 31m10h 42m9h 6m8h 15m

Solar UV radiation in Nanaimo, Canada

Nanaimo experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Nanaimo UV Index data.

Average daily maximum UV levels by month for Nanaimo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)234689986421