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Monthly climate in Shunan, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Shunan features a humid subtropical climate (Cfa). Temperatures typically range between 7 °C (44 °F) and 27 °C (81 °F) through the year, but rarely can drop to -2 °C (28 °F) or can rise to as high as 33 °C (91 °F). The average annual precipitation amounts to about 1860 mm (73.2 inches) and receives 126 rainy days on the 1 mm (0.04 inches) threshold annually. Shunan enjoys an average of 3070 hours of sunshine throughout the year, and daylight varies from 9 hours 54 minutes to 14 hours 22 minutes per day.

Monthly average temperatures in Shunan, Japan

The warmest months in Shunan are July, August and September, with daily mean temperatures ranging from 24 to 27 °C (76 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (44 - 48 °F) throughout the day. On average each year, Shunan experiences 77 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 Shunan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(60°F)		17°C
(63°F)		18°C
(65°F)		22°C
(71°F)		25°C
(77°F)		27°C
(81°F)		33°C
(91°F)		33°C
(91°F)		31°C
(88°F)		28°C
(82°F)		23°C
(73°F)		20°C
(68°F)
Mean maximum13°C
(56°F)		14°C
(57°F)		17°C
(64°F)		20°C
(69°F)		24°C
(76°F)		26°C
(79°F)		31°C
(88°F)		32°C
(91°F)		30°C
(86°F)		26°C
(80°F)		22°C
(71°F)		17°C
(62°F)
Average high9°C
(49°F)		9°C
(49°F)		13°C
(56°F)		17°C
(62°F)		21°C
(69°F)		24°C
(75°F)		28°C
(82°F)		29°C
(85°F)		26°C
(80°F)		22°C
(72°F)		17°C
(63°F)		11°C
(52°F)
Daily mean7°C
(44°F)		7°C
(45°F)		10°C
(51°F)		14°C
(57°F)		18°C
(65°F)		22°C
(71°F)		26°C
(78°F)		27°C
(81°F)		24°C
(76°F)		20°C
(67°F)		14°C
(58°F)		9°C
(48°F)
Average low5°C
(40°F)		4°C
(40°F)		8°C
(46°F)		11°C
(52°F)		16°C
(60°F)		19°C
(67°F)		24°C
(75°F)		25°C
(78°F)		22°C
(72°F)		17°C
(63°F)		11°C
(53°F)		7°C
(44°F)
Mean minimum1°C
(34°F)		0°C
(33°F)		3°C
(38°F)		6°C
(43°F)		11°C
(52°F)		16°C
(62°F)		21°C
(71°F)		23°C
(73°F)		18°C
(64°F)		12°C
(54°F)		7°C
(44°F)		2°C
(36°F)
Minimum-2°C
(28°F)		-1°C
(30°F)		2°C
(36°F)		5°C
(41°F)		10°C
(51°F)		15°C
(60°F)		19°C
(67°F)		21°C
(70°F)		17°C
(63°F)		11°C
(53°F)		5°C
(42°F)		1°C
(33°F)

Compare climate in Shunan with other places

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

Monthly average precipitation in Shunan, Japan

Shunan usually has the most precipitation in July, August and September, with an average of 14 rainy days and 271 mm (10.7 inches) of precipitation per month. The driest months in Shunan are January, November and December. On average, 56 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Shunan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)57 (2.2)82 (3.2)130 (5.1)144 (5.7)166 (6.5)203 (8.0)358 (14.1)235 (9.3)221 (8.7)153 (6.0)45 (1.8)65 (2.6)
Average precipitation days (≥ 1 mm)89118913181313969

Monthly sunshine hours in Shunan, Japan

The sunniest months in Shunan are May, June and August, when the sun shines an average of 9 hours 35 minutes a day. Least sunny months in Shunan: January, February and December receive an average of 6 hours 50 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Shunan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours176230265279298280274303255256235215
Mean daily daylight hours10h 8m10h 56m11h 58m13h 1m13h 55m14h 22m14h 8m13h 22m12h 21m11h 18m10h 22m9h 54m

Solar UV radiation in Shunan, Japan

Shunan experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the 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 5. For more detailed information, check out our hourly Shunan UV Index data.

Average daily maximum UV levels by month for Shunan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)458111111121210764