nomadseason

Monthly climate in Hiranai, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hiranai features a humid subtropical climate (Cfa). Temperatures typically range between 0 °C (32 °F) and 23 °C (74 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1394 mm (54.9 inches) and receives 187 rainy days on the 1 mm (0.04 inches) threshold annually. Hiranai enjoys an average of 2918 hours of sunshine throughout the year, and daylight varies from 9 hours 16 minutes to 15 hours 2 minutes per day.

Monthly average temperatures in Hiranai, Japan

The warmest months in Hiranai are July, August and September, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 2 °C (32 - 37 °F) throughout the day. On average each year, Hiranai experiences 24 days above 25 °C (77.0 °F) and 62 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hiranai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(44°F)		8°C
(46°F)		16°C
(60°F)		19°C
(67°F)		26°C
(79°F)		25°C
(78°F)		30°C
(87°F)		31°C
(88°F)		30°C
(86°F)		26°C
(79°F)		18°C
(64°F)		14°C
(57°F)
Mean maximum6°C
(42°F)		7°C
(44°F)		13°C
(56°F)		18°C
(64°F)		22°C
(71°F)		23°C
(73°F)		28°C
(83°F)		29°C
(85°F)		27°C
(81°F)		23°C
(73°F)		17°C
(63°F)		11°C
(51°F)
Average high1°C
(35°F)		2°C
(35°F)		6°C
(43°F)		11°C
(51°F)		16°C
(61°F)		19°C
(67°F)		23°C
(74°F)		25°C
(77°F)		23°C
(73°F)		17°C
(63°F)		11°C
(52°F)		4°C
(40°F)
Daily mean-0°C
(32°F)		0°C
(32°F)		4°C
(39°F)		8°C
(47°F)		13°C
(56°F)		17°C
(63°F)		21°C
(71°F)		23°C
(74°F)		20°C
(69°F)		15°C
(59°F)		9°C
(48°F)		2°C
(37°F)
Average low-2°C
(29°F)		-2°C
(29°F)		2°C
(35°F)		6°C
(42°F)		11°C
(52°F)		15°C
(59°F)		20°C
(68°F)		21°C
(71°F)		18°C
(65°F)		13°C
(55°F)		7°C
(44°F)		1°C
(34°F)
Mean minimum-7°C
(20°F)		-6°C
(21°F)		-3°C
(27°F)		1°C
(35°F)		7°C
(45°F)		11°C
(53°F)		16°C
(60°F)		18°C
(65°F)		14°C
(57°F)		8°C
(47°F)		1°C
(35°F)		-4°C
(25°F)
Minimum-10°C
(14°F)		-7°C
(19°F)		-7°C
(20°F)		0°C
(33°F)		6°C
(44°F)		10°C
(51°F)		14°C
(57°F)		17°C
(62°F)		12°C
(54°F)		8°C
(46°F)		-1°C
(30°F)		-6°C
(22°F)

Compare climate in Hiranai with other places

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

Monthly average precipitation in Hiranai, Japan

Hiranai usually has the most precipitation in August, October and December, with an average of 18 rainy days and 162 mm (6.4 inches) of precipitation per month. The driest months in Hiranai are January, March and November. On average, 89 mm (3.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hiranai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)85 (3.4)100 (3.9)89 (3.5)96 (3.8)96 (3.8)116 (4.6)124 (4.9)186 (7.3)110 (4.3)158 (6.2)92 (3.6)141 (5.6)
Average precipitation days (≥ 1 mm)172016141311121512141825

Monthly sunshine hours in Hiranai, Japan

The sunniest months in Hiranai are May, June and July, when the sun shines an average of 9 hours 37 minutes a day. Least sunny months in Hiranai: January, November and December receive an average of 5 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hiranai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours155200253279299288297278261229191183
Mean daily daylight hours9h 35m10h 37m11h 56m13h 18m14h 27m15h 2m14h 45m13h 44m12h 26m11h 5m9h 53m9h 16m

Solar UV radiation in Hiranai, Japan

Hiranai experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Hiranai UV Index data.

Average daily maximum UV levels by month for Hiranai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235891010118642