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Monthly climate in Nichinan, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Nichinan features a humid subtropical climate (Cfa). Temperatures typically range between 9 °C (49 °F) and 28 °C (82 °F) through the year, but rarely can drop to -1 °C (31 °F) or can rise to as high as 34 °C (93 °F). The average annual precipitation amounts to about 2398 mm (94.4 inches) and receives 157 rainy days on the 1 mm (0.04 inches) threshold annually. Nichinan enjoys an average of 3062 hours of sunshine throughout the year, and daylight varies from 10 hours 6 minutes to 14 hours 9 minutes per day.

Monthly average temperatures in Nichinan, Japan

The warmest months in Nichinan are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (78 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 11 °C (49 - 52 °F) throughout the day. On average each year, Nichinan experiences 104 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nichinan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(69°F)		21°C
(70°F)		24°C
(75°F)		26°C
(78°F)		29°C
(84°F)		30°C
(87°F)		33°C
(91°F)		34°C
(93°F)		32°C
(89°F)		30°C
(87°F)		25°C
(78°F)		22°C
(73°F)
Mean maximum18°C
(65°F)		19°C
(66°F)		22°C
(72°F)		24°C
(75°F)		27°C
(81°F)		28°C
(83°F)		32°C
(89°F)		32°C
(90°F)		31°C
(88°F)		28°C
(83°F)		24°C
(75°F)		20°C
(68°F)
Average high13°C
(55°F)		13°C
(56°F)		17°C
(63°F)		20°C
(68°F)		23°C
(74°F)		25°C
(78°F)		29°C
(84°F)		30°C
(86°F)		28°C
(82°F)		24°C
(75°F)		19°C
(67°F)		14°C
(58°F)
Daily mean9°C
(49°F)		10°C
(50°F)		14°C
(57°F)		17°C
(63°F)		20°C
(69°F)		23°C
(74°F)		27°C
(80°F)		28°C
(82°F)		25°C
(78°F)		21°C
(71°F)		16°C
(62°F)		11°C
(52°F)
Average low6°C
(43°F)		7°C
(44°F)		11°C
(51°F)		14°C
(57°F)		18°C
(64°F)		21°C
(70°F)		25°C
(77°F)		26°C
(78°F)		23°C
(75°F)		19°C
(66°F)		13°C
(56°F)		8°C
(47°F)
Mean minimum1°C
(34°F)		2°C
(35°F)		5°C
(42°F)		8°C
(46°F)		13°C
(55°F)		18°C
(65°F)		23°C
(73°F)		24°C
(76°F)		20°C
(68°F)		13°C
(56°F)		7°C
(45°F)		2°C
(36°F)
Minimum-1°C
(31°F)		0°C
(32°F)		4°C
(39°F)		6°C
(44°F)		11°C
(51°F)		17°C
(63°F)		21°C
(69°F)		23°C
(74°F)		18°C
(66°F)		12°C
(53°F)		6°C
(43°F)		1°C
(33°F)

Compare climate in Nichinan with other places

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

Monthly average precipitation in Nichinan, Japan

Nichinan usually has the most precipitation in June, July and September, with an average of 20 rainy days and 342 mm (13.5 inches) of precipitation per month. The driest months in Nichinan are January, November and December. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nichinan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)60 (2.4)114 (4.5)189 (7.4)144 (5.7)242 (9.5)397 (15.6)329 (12.9)238 (9.4)302 (11.9)196 (7.7)103 (4.1)85 (3.4)
Average precipitation days (≥ 1 mm)510131014192118201287

Monthly sunshine hours in Nichinan, Japan

The sunniest months in Nichinan are April, July and August, when the sun shines an average of 9 hours 22 minutes a day. Least sunny months in Nichinan: January, February and December receive an average of 7 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nichinan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours198231267283271242273305260257239232
Mean daily daylight hours10h 19m11h 2m11h 59m12h 56m13h 45m14h 9m13h 57m13h 15m12h 19m11h 22m10h 32m10h 6m

Solar UV radiation in Nichinan, Japan

Nichinan experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 13, 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 Nichinan UV Index data.

Average daily maximum UV levels by month for Nichinan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5610101212121311864