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Monthly climate in Hioki, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hioki features a humid subtropical climate (Cfa). Temperatures typically range between 10 °C (51 °F) and 28 °C (83 °F) through the year, but rarely can drop to 1 °C (35 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 2479 mm (97.6 inches) and receives 157 rainy days on the 1 mm (0.04 inches) threshold annually. Hioki enjoys an average of 3126 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 Hioki, Japan

The warmest months in Hioki are July, August and September, with daily mean temperatures ranging from 26 to 28 °C (79 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (51 - 54 °F) throughout the day. On average each year, Hioki experiences 108 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 Hioki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(68°F)		20°C
(68°F)		23°C
(74°F)		25°C
(78°F)		28°C
(83°F)		30°C
(86°F)		33°C
(92°F)		33°C
(92°F)		32°C
(91°F)		30°C
(86°F)		25°C
(77°F)		24°C
(75°F)
Mean maximum18°C
(65°F)		18°C
(65°F)		21°C
(70°F)		24°C
(75°F)		27°C
(80°F)		28°C
(83°F)		32°C
(90°F)		33°C
(92°F)		32°C
(89°F)		29°C
(84°F)		24°C
(75°F)		20°C
(69°F)
Average high13°C
(55°F)		13°C
(56°F)		17°C
(62°F)		20°C
(68°F)		23°C
(74°F)		26°C
(79°F)		29°C
(85°F)		31°C
(87°F)		28°C
(83°F)		25°C
(76°F)		19°C
(67°F)		14°C
(58°F)
Daily mean10°C
(51°F)		11°C
(52°F)		14°C
(58°F)		17°C
(63°F)		21°C
(69°F)		24°C
(75°F)		27°C
(81°F)		28°C
(83°F)		26°C
(79°F)		22°C
(72°F)		17°C
(63°F)		12°C
(54°F)
Average low8°C
(47°F)		8°C
(47°F)		11°C
(53°F)		15°C
(59°F)		18°C
(65°F)		22°C
(71°F)		25°C
(78°F)		26°C
(80°F)		24°C
(76°F)		20°C
(68°F)		15°C
(58°F)		10°C
(50°F)
Mean minimum3°C
(38°F)		4°C
(40°F)		7°C
(44°F)		10°C
(51°F)		14°C
(57°F)		19°C
(66°F)		23°C
(74°F)		24°C
(75°F)		21°C
(70°F)		15°C
(60°F)		10°C
(49°F)		5°C
(42°F)
Minimum1°C
(35°F)		2°C
(36°F)		6°C
(43°F)		10°C
(50°F)		12°C
(54°F)		18°C
(65°F)		21°C
(70°F)		22°C
(72°F)		20°C
(68°F)		15°C
(59°F)		7°C
(46°F)		4°C
(39°F)

Compare climate in Hioki with other places

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

Monthly average precipitation in Hioki, Japan

Hioki usually has the most precipitation in June, July and September, with an average of 18 rainy days and 369 mm (14.5 inches) of precipitation per month. The driest months in Hioki are January, November and December. On average, 95 mm (3.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hioki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)67 (2.6)121 (4.7)188 (7.4)160 (6.3)271 (10.7)411 (16.2)418 (16.4)206 (8.1)278 (11.0)143 (5.6)116 (4.6)101 (4.0)
Average precipitation days (≥ 1 mm)101214101217201517101010

Monthly sunshine hours in Hioki, Japan

The sunniest months in Hioki are April, July and August, when the sun shines an average of 9 hours 40 minutes a day. Least sunny months in Hioki: January, February and December receive an average of 7 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hioki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours188232267289283255285315273264244226
Mean daily daylight hours10h 19m11h 2m11h 58m12h 56m13h 45m14h 9m13h 57m13h 15m12h 19m11h 22m10h 32m10h 6m

Solar UV radiation in Hioki, Japan

Hioki 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 Hioki UV Index data.

Average daily maximum UV levels by month for Hioki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5610111212121311864