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Monthly climate in Sukumo, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sukumo features a humid subtropical climate (Cfa). Temperatures typically range between 8 °C (47 °F) and 28 °C (82 °F) through the year, but rarely can drop to -2 °C (29 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 2239 mm (88.1 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Sukumo enjoys an average of 3149 hours of sunshine throughout the year, and daylight varies from 9 hours 59 minutes to 14 hours 17 minutes per day.

Monthly average temperatures in Sukumo, Japan

The warmest months in Sukumo are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (77 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (47 - 50 °F) throughout the day. On average each year, Sukumo experiences 102 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sukumo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(65°F)		20°C
(69°F)		23°C
(73°F)		25°C
(77°F)		28°C
(83°F)		29°C
(85°F)		34°C
(93°F)		35°C
(96°F)		32°C
(91°F)		29°C
(85°F)		24°C
(76°F)		22°C
(72°F)
Mean maximum16°C
(62°F)		17°C
(63°F)		21°C
(71°F)		24°C
(75°F)		26°C
(80°F)		28°C
(83°F)		33°C
(91°F)		33°C
(92°F)		32°C
(89°F)		29°C
(84°F)		23°C
(74°F)		18°C
(65°F)
Average high11°C
(52°F)		12°C
(53°F)		16°C
(61°F)		19°C
(67°F)		23°C
(73°F)		25°C
(78°F)		29°C
(84°F)		30°C
(87°F)		28°C
(82°F)		24°C
(75°F)		19°C
(66°F)		13°C
(56°F)
Daily mean8°C
(47°F)		8°C
(47°F)		13°C
(55°F)		16°C
(61°F)		20°C
(68°F)		23°C
(73°F)		26°C
(80°F)		28°C
(82°F)		25°C
(77°F)		21°C
(69°F)		15°C
(59°F)		10°C
(50°F)
Average low5°C
(41°F)		5°C
(41°F)		9°C
(48°F)		12°C
(54°F)		17°C
(62°F)		20°C
(68°F)		24°C
(76°F)		25°C
(78°F)		23°C
(73°F)		17°C
(64°F)		11°C
(53°F)		7°C
(44°F)
Mean minimum0°C
(33°F)		1°C
(33°F)		3°C
(38°F)		6°C
(43°F)		11°C
(53°F)		17°C
(62°F)		22°C
(72°F)		23°C
(74°F)		18°C
(65°F)		12°C
(54°F)		5°C
(42°F)		2°C
(36°F)
Minimum-2°C
(29°F)		-1°C
(30°F)		2°C
(36°F)		5°C
(41°F)		10°C
(51°F)		15°C
(59°F)		19°C
(67°F)		21°C
(70°F)		17°C
(62°F)		11°C
(52°F)		4°C
(40°F)		1°C
(34°F)

Compare climate in Sukumo with other places

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

Monthly average precipitation in Sukumo, Japan

Sukumo usually has the most precipitation in June, July and September, with an average of 16 rainy days and 308 mm (12.1 inches) of precipitation per month. The driest months in Sukumo are January, November and December. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sukumo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)59 (2.3)98 (3.9)153 (6.0)165 (6.5)209 (8.2)265 (10.4)397 (15.6)235 (9.3)263 (10.4)240 (9.5)77 (3.0)77 (3.0)
Average precipitation days (≥ 1 mm)61012812151815171176

Monthly sunshine hours in Sukumo, Japan

The sunniest months in Sukumo are April, May and August, when the sun shines an average of 9 hours 44 minutes a day. Least sunny months in Sukumo: January, February and December receive an average of 7 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sukumo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours190235271287298275286310269259241224
Mean daily daylight hours10h 13m10h 59m11h 58m12h 59m13h 51m14h 17m14h 4m13h 19m12h 21m11h 19m10h 26m9h 59m

Solar UV radiation in Sukumo, Japan

Sukumo experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Sukumo UV Index data.

Average daily maximum UV levels by month for Sukumo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)469101212121211864