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Monthly climate in Susaki, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Susaki features a humid subtropical climate (Cfa). Temperatures typically range between 5 °C (41 °F) and 27 °C (80 °F) through the year, but rarely can drop to -5 °C (23 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2907 mm (114.4 inches) and receives 164 rainy days on the 1 mm (0.04 inches) threshold annually. Susaki enjoys an average of 3192 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Susaki, Japan

The warmest months in Susaki are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (74 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (41 - 45 °F) throughout the day. On average each year, Susaki experiences 87 days above 25 °C (77.0 °F) and 23 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Susaki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(63°F)		20°C
(69°F)		23°C
(74°F)		24°C
(76°F)		28°C
(84°F)		30°C
(86°F)		34°C
(94°F)		36°C
(97°F)		32°C
(90°F)		29°C
(84°F)		23°C
(73°F)		21°C
(70°F)
Mean maximum15°C
(59°F)		17°C
(62°F)		21°C
(71°F)		23°C
(74°F)		27°C
(81°F)		28°C
(83°F)		33°C
(91°F)		33°C
(92°F)		31°C
(89°F)		28°C
(83°F)		22°C
(72°F)		17°C
(64°F)
Average high9°C
(49°F)		10°C
(51°F)		15°C
(59°F)		19°C
(66°F)		22°C
(72°F)		25°C
(77°F)		28°C
(83°F)		30°C
(86°F)		27°C
(80°F)		22°C
(73°F)		17°C
(63°F)		11°C
(53°F)
Daily mean5°C
(41°F)		6°C
(43°F)		10°C
(50°F)		14°C
(57°F)		18°C
(65°F)		21°C
(71°F)		25°C
(78°F)		27°C
(80°F)		23°C
(74°F)		18°C
(65°F)		12°C
(54°F)		7°C
(45°F)
Average low1°C
(35°F)		2°C
(35°F)		5°C
(42°F)		9°C
(49°F)		14°C
(57°F)		18°C
(65°F)		23°C
(73°F)		24°C
(75°F)		20°C
(69°F)		15°C
(59°F)		8°C
(46°F)		3°C
(38°F)
Mean minimum-3°C
(27°F)		-3°C
(28°F)		0°C
(32°F)		2°C
(36°F)		7°C
(45°F)		14°C
(58°F)		20°C
(69°F)		21°C
(70°F)		15°C
(59°F)		8°C
(46°F)		2°C
(35°F)		-1°C
(31°F)
Minimum-5°C
(23°F)		-5°C
(23°F)		-1°C
(31°F)		1°C
(33°F)		6°C
(43°F)		12°C
(55°F)		18°C
(65°F)		19°C
(67°F)		12°C
(54°F)		6°C
(44°F)		1°C
(34°F)		-2°C
(29°F)

Compare climate in Susaki with other places

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

Monthly average precipitation in Susaki, Japan

Susaki usually has the most precipitation in July, August and September, with an average of 22 rainy days and 432 mm (17.0 inches) of precipitation per month. The driest months in Susaki are January, November and December. On average, 75 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Susaki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)68 (2.7)102 (4.0)185 (7.3)200 (7.9)233 (9.2)321 (12.7)581 (22.9)348 (13.7)368 (14.5)343 (13.5)79 (3.1)77 (3.0)
Average precipitation days (≥ 1 mm)59131113182522211377

Monthly sunshine hours in Susaki, Japan

The sunniest months in Susaki are May, July and August, when the sun shines an average of 9 hours 45 minutes a day. Least sunny months in Susaki: January, February and December receive an average of 7 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Susaki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours194239275288302283290313270259244230
Mean daily daylight hours10h 11m10h 58m11h 58m13h 0m13h 52m14h 18m14h 5m13h 20m12h 20m11h 19m10h 25m9h 58m

Solar UV radiation in Susaki, Japan

Susaki 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 Susaki UV Index data.

Average daily maximum UV levels by month for Susaki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)469101212121210864