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Monthly climate in Semboku, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Semboku features a humid continental climate (Dfb). Temperatures typically range between -4 °C (25 °F) and 22 °C (73 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 2010 mm (79.1 inches) and receives 214 rainy days on the 1 mm (0.04 inches) threshold annually. Semboku enjoys an average of 2850 hours of sunshine throughout the year, and daylight varies from 9 hours 23 minutes to 14 hours 55 minutes per day.

Monthly average temperatures in Semboku, Japan

The warmest months in Semboku are July, August and September, with daily mean temperatures ranging from 18 to 22 °C (65 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Semboku experiences 34 days above 25 °C (77.0 °F) and 125 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Semboku. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum4°C
(40°F)		7°C
(46°F)		14°C
(58°F)		22°C
(71°F)		28°C
(82°F)		28°C
(82°F)		31°C
(89°F)		33°C
(92°F)		30°C
(87°F)		25°C
(78°F)		19°C
(66°F)		11°C
(52°F)
Mean maximum4°C
(39°F)		6°C
(43°F)		12°C
(55°F)		19°C
(66°F)		25°C
(77°F)		24°C
(76°F)		30°C
(86°F)		31°C
(88°F)		27°C
(81°F)		23°C
(74°F)		16°C
(62°F)		8°C
(47°F)
Average high-1°C
(31°F)		0°C
(32°F)		5°C
(42°F)		11°C
(52°F)		18°C
(64°F)		21°C
(70°F)		25°C
(77°F)		26°C
(79°F)		22°C
(72°F)		16°C
(61°F)		9°C
(48°F)		1°C
(35°F)
Daily mean-4°C
(25°F)		-3°C
(26°F)		1°C
(34°F)		6°C
(44°F)		13°C
(56°F)		17°C
(63°F)		21°C
(71°F)		22°C
(73°F)		18°C
(65°F)		12°C
(54°F)		5°C
(42°F)		-1°C
(30°F)
Average low-8°C
(19°F)		-7°C
(20°F)		-3°C
(27°F)		2°C
(36°F)		9°C
(48°F)		13°C
(56°F)		18°C
(65°F)		19°C
(67°F)		15°C
(59°F)		8°C
(47°F)		2°C
(35°F)		-5°C
(24°F)
Mean minimum-14°C
(8°F)		-13°C
(9°F)		-10°C
(15°F)		-4°C
(25°F)		3°C
(38°F)		9°C
(48°F)		14°C
(57°F)		14°C
(58°F)		8°C
(47°F)		2°C
(36°F)		-5°C
(24°F)		-11°C
(12°F)
Minimum-17°C
(2°F)		-14°C
(7°F)		-12°C
(11°F)		-8°C
(18°F)		2°C
(35°F)		4°C
(40°F)		13°C
(55°F)		11°C
(52°F)		4°C
(40°F)		1°C
(34°F)		-10°C
(14°F)		-12°C
(10°F)

Compare climate in Semboku with other places

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

Monthly average precipitation in Semboku, Japan

Semboku usually has the most precipitation in June, July and August, with an average of 17 rainy days and 219 mm (8.6 inches) of precipitation per month. The driest months in Semboku are January, February and November. On average, 127 mm (5.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Semboku. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)105 (4.1)140 (5.5)141 (5.6)170 (6.7)160 (6.3)182 (7.2)237 (9.3)238 (9.4)170 (6.7)179 (7.1)134 (5.3)153 (6.0)
Average precipitation days (≥ 1 mm)192117181615191716141725

Monthly sunshine hours in Semboku, Japan

The sunniest months in Semboku are May, June and July, when the sun shines an average of 9 hours 15 minutes a day. Least sunny months in Semboku: January, November and December receive an average of 5 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Semboku. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours155201250266294278279276246215200184
Mean daily daylight hours9h 41m10h 41m11h 56m13h 15m14h 21m14h 55m14h 38m13h 40m12h 25m11h 7m9h 59m9h 23m

Solar UV radiation in Semboku, Japan

Semboku 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 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 Semboku UV Index data.

Average daily maximum UV levels by month for Semboku. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346991010119643