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Monthly climate in Nanao, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Nanao features a humid subtropical climate (Cfa). Temperatures typically range between 5 °C (41 °F) and 29 °C (84 °F) through the year, but rarely can drop to -4 °C (24 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 1899 mm (74.8 inches) and receives 184 rainy days on the 1 mm (0.04 inches) threshold annually. Nanao enjoys an average of 3024 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 38 minutes per day.

Monthly average temperatures in Nanao, Japan

The warmest months in Nanao are July, August and September, with daily mean temperatures ranging from 24 to 29 °C (76 - 84 °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, Nanao experiences 93 days above 25 °C (77.0 °F) and 9 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nanao. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum16°C
(60°F)		18°C
(65°F)		22°C
(72°F)		27°C
(82°F)		30°C
(87°F)		32°C
(90°F)		37°C
(99°F)		39°C
(103°F)		38°C
(100°F)		32°C
(89°F)		26°C
(78°F)		21°C
(71°F)
Mean maximum13°C
(55°F)		14°C
(58°F)		20°C
(68°F)		23°C
(74°F)		29°C
(84°F)		29°C
(85°F)		34°C
(94°F)		37°C
(98°F)		32°C
(90°F)		28°C
(83°F)		22°C
(73°F)		17°C
(62°F)
Average high7°C
(44°F)		8°C
(46°F)		12°C
(54°F)		16°C
(62°F)		22°C
(73°F)		25°C
(78°F)		30°C
(86°F)		32°C
(89°F)		27°C
(81°F)		21°C
(71°F)		16°C
(61°F)		10°C
(50°F)
Daily mean5°C
(41°F)		5°C
(41°F)		9°C
(48°F)		13°C
(55°F)		18°C
(66°F)		22°C
(72°F)		27°C
(80°F)		29°C
(84°F)		24°C
(76°F)		19°C
(66°F)		13°C
(55°F)		7°C
(45°F)
Average low2°C
(37°F)		2°C
(37°F)		5°C
(42°F)		9°C
(49°F)		15°C
(59°F)		19°C
(67°F)		24°C
(76°F)		26°C
(79°F)		22°C
(71°F)		16°C
(61°F)		10°C
(50°F)		5°C
(41°F)
Mean minimum-2°C
(29°F)		-1°C
(30°F)		1°C
(34°F)		4°C
(40°F)		9°C
(48°F)		15°C
(60°F)		21°C
(70°F)		22°C
(71°F)		17°C
(63°F)		11°C
(52°F)		5°C
(41°F)		-0°C
(32°F)
Minimum-4°C
(24°F)		-3°C
(26°F)		1°C
(34°F)		2°C
(35°F)		7°C
(44°F)		13°C
(56°F)		21°C
(69°F)		20°C
(69°F)		15°C
(59°F)		10°C
(51°F)		3°C
(37°F)		-2°C
(28°F)

Compare climate in Nanao with other places

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

Monthly average precipitation in Nanao, Japan

Nanao usually has the most precipitation in July, August and September, with an average of 16 rainy days and 248 mm (9.8 inches) of precipitation per month. The driest months in Nanao are February, May and November. On average, 105 mm (4.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nanao. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)115 (4.5)106 (4.2)126 (5.0)144 (5.7)103 (4.0)141 (5.6)295 (11.6)228 (9.0)222 (8.7)160 (6.3)107 (4.2)153 (6.0)
Average precipitation days (≥ 1 mm)191615131211191615131322

Monthly sunshine hours in Nanao, Japan

The sunniest months in Nanao are May, June and August, when the sun shines an average of 10 hours 2 minutes a day. Least sunny months in Nanao: January, February and December receive an average of 5 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nanao. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours152197258285309302298311256238218195
Mean daily daylight hours9h 55m10h 48m11h 57m13h 8m14h 8m14h 38m14h 23m13h 31m12h 23m11h 12m10h 10m9h 39m

Solar UV radiation in Nanao, Japan

Nanao experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 11, 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 4. For more detailed information, check out our hourly Nanao UV Index data.

Average daily maximum UV levels by month for Nanao. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)34710101111119753