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Monthly climate in Aomori, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Aomori features a humid subtropical climate (Cfa). Temperatures typically range between -2 °C (28 °F) and 23 °C (74 °F) through the year, but rarely can drop to -18 °C (-1 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 1441 mm (56.7 inches) and receives 192 rainy days on the 1 mm (0.04 inches) threshold annually. Aomori enjoys an average of 2914 hours of sunshine throughout the year, and daylight varies from 9 hours 17 minutes to 15 hours 2 minutes per day.

Monthly average temperatures in Aomori, Japan

The warmest months in Aomori are July, August and September, with daily mean temperatures ranging from 19 to 23 °C (67 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 0 °C (28 - 32 °F) throughout the day. On average each year, Aomori experiences 47 days above 25 °C (77.0 °F) and 101 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Aomori. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum6°C
(43°F)		8°C
(47°F)		17°C
(64°F)		23°C
(74°F)		31°C
(88°F)		31°C
(87°F)		33°C
(92°F)		35°C
(95°F)		33°C
(92°F)		27°C
(80°F)		20°C
(68°F)		13°C
(56°F)
Mean maximum5°C
(41°F)		7°C
(45°F)		14°C
(58°F)		20°C
(69°F)		27°C
(81°F)		26°C
(79°F)		31°C
(88°F)		32°C
(91°F)		29°C
(85°F)		23°C
(75°F)		18°C
(65°F)		10°C
(50°F)
Average high0°C
(33°F)		1°C
(34°F)		6°C
(43°F)		12°C
(54°F)		19°C
(66°F)		22°C
(72°F)		26°C
(79°F)		27°C
(80°F)		23°C
(74°F)		17°C
(63°F)		10°C
(50°F)		2°C
(36°F)
Daily mean-2°C
(28°F)		-2°C
(29°F)		3°C
(37°F)		8°C
(47°F)		14°C
(58°F)		18°C
(64°F)		22°C
(73°F)		23°C
(74°F)		19°C
(67°F)		13°C
(56°F)		7°C
(44°F)		-0°C
(32°F)
Average low-5°C
(24°F)		-4°C
(25°F)		-1°C
(31°F)		4°C
(39°F)		10°C
(50°F)		14°C
(58°F)		19°C
(67°F)		20°C
(69°F)		16°C
(60°F)		9°C
(49°F)		3°C
(39°F)		-2°C
(28°F)
Mean minimum-11°C
(12°F)		-9°C
(15°F)		-7°C
(20°F)		-2°C
(29°F)		5°C
(40°F)		9°C
(49°F)		14°C
(58°F)		15°C
(59°F)		9°C
(49°F)		3°C
(38°F)		-3°C
(27°F)		-8°C
(18°F)
Minimum-18°C
(-1°F)		-10°C
(14°F)		-12°C
(10°F)		-4°C
(25°F)		4°C
(39°F)		7°C
(45°F)		13°C
(55°F)		13°C
(55°F)		7°C
(44°F)		2°C
(36°F)		-8°C
(17°F)		-10°C
(15°F)

Compare climate in Aomori with other places

Compare temperature, precipitation, sunshine, UV index in Aomori, Japan with other places around the world.

Monthly average precipitation in Aomori, Japan

Aomori usually has the most precipitation in July, August and October, with an average of 15 rainy days and 165 mm (6.5 inches) of precipitation per month. The driest months in Aomori are January, February and November. On average, 87 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Aomori. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)72 (2.8)98 (3.9)99 (3.9)113 (4.4)109 (4.3)134 (5.3)152 (6.0)183 (7.2)124 (4.9)160 (6.3)91 (3.6)108 (4.3)
Average precipitation days (≥ 1 mm)162017161313161613131623

Monthly sunshine hours in Aomori, Japan

The sunniest months in Aomori are May, June and July, when the sun shines an average of 9 hours 42 minutes a day. Least sunny months in Aomori: January, November and December receive an average of 5 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Aomori. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours154200250272299290303280259227193182
Mean daily daylight hours9h 35m10h 37m11h 56m13h 18m14h 27m15h 2m14h 44m13h 44m12h 26m11h 5m9h 54m9h 17m

Solar UV radiation in Aomori, Japan

Aomori experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme 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 4. For more detailed information, check out our hourly Aomori UV Index data.

Average daily maximum UV levels by month for Aomori. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891010118642