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Monthly climate in Sendai, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sendai features a humid subtropical climate (Cfa). Temperatures typically range between 0 °C (33 °F) and 25 °C (77 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 1458 mm (57.4 inches) and receives 165 rainy days on the 1 mm (0.04 inches) threshold annually. Sendai enjoys an average of 2893 hours of sunshine throughout the year, and daylight varies from 9 hours 32 minutes to 14 hours 45 minutes per day.

Monthly average temperatures in Sendai, Japan

The warmest months in Sendai are July, August and September, with daily mean temperatures ranging from 21 to 25 °C (69 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 3 °C (33 - 37 °F) throughout the day. On average each year, Sendai experiences 55 days above 25 °C (77.0 °F) and 77 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sendai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum11°C
(52°F)		15°C
(59°F)		20°C
(69°F)		26°C
(80°F)		30°C
(87°F)		32°C
(89°F)		35°C
(95°F)		35°C
(95°F)		33°C
(92°F)		27°C
(81°F)		21°C
(69°F)		16°C
(61°F)
Mean maximum8°C
(48°F)		12°C
(54°F)		18°C
(64°F)		22°C
(72°F)		27°C
(82°F)		27°C
(81°F)		32°C
(89°F)		33°C
(92°F)		30°C
(86°F)		25°C
(78°F)		19°C
(67°F)		13°C
(55°F)
Average high4°C
(39°F)		5°C
(41°F)		10°C
(50°F)		14°C
(58°F)		20°C
(69°F)		23°C
(73°F)		26°C
(80°F)		28°C
(82°F)		24°C
(75°F)		18°C
(66°F)		13°C
(56°F)		6°C
(44°F)
Daily mean0°C
(33°F)		1°C
(35°F)		5°C
(42°F)		10°C
(50°F)		16°C
(61°F)		19°C
(67°F)		23°C
(74°F)		25°C
(77°F)		21°C
(69°F)		15°C
(59°F)		9°C
(48°F)		3°C
(37°F)
Average low-3°C
(27°F)		-2°C
(28°F)		1°C
(34°F)		5°C
(41°F)		11°C
(53°F)		16°C
(61°F)		21°C
(69°F)		22°C
(72°F)		17°C
(63°F)		11°C
(53°F)		5°C
(41°F)		-0°C
(32°F)
Mean minimum-8°C
(17°F)		-6°C
(21°F)		-3°C
(28°F)		-1°C
(31°F)		5°C
(42°F)		11°C
(53°F)		16°C
(62°F)		17°C
(63°F)		12°C
(53°F)		5°C
(41°F)		-1°C
(30°F)		-5°C
(24°F)
Minimum-10°C
(14°F)		-10°C
(14°F)		-3°C
(26°F)		-2°C
(29°F)		4°C
(40°F)		10°C
(49°F)		15°C
(60°F)		14°C
(58°F)		8°C
(47°F)		4°C
(39°F)		-3°C
(27°F)		-5°C
(23°F)

Compare climate in Sendai with other places

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

Monthly average precipitation in Sendai, Japan

Sendai usually has the most precipitation in July, August and October, with an average of 16 rainy days and 218 mm (8.6 inches) of precipitation per month. The driest months in Sendai are January, February and November. On average, 53 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sendai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.6)53 (2.1)112 (4.4)109 (4.3)107 (4.2)101 (4.0)232 (9.1)214 (8.4)150 (5.9)208 (8.2)40 (1.6)67 (2.6)
Average precipitation days (≥ 1 mm)13121312131318201412916

Monthly sunshine hours in Sendai, Japan

The sunniest months in Sendai are April, May and June, when the sun shines an average of 9 hours 16 minutes a day. Least sunny months in Sendai: January, October and December receive an average of 6 hours 14 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sendai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours167221258271292280253271246209218203
Mean daily daylight hours9h 49m10h 45m11h 57m13h 11m14h 14m14h 45m14h 29m13h 34m12h 24m11h 10m10h 6m9h 32m

Solar UV radiation in Sendai, Japan

Sendai experiences the highest level of ultraviolet (UV) radiation in May, 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 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 Sendai UV Index data.

Average daily maximum UV levels by month for Sendai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3478101011119643