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Monthly climate in Hitachi, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hitachi features a humid subtropical climate (Cfa). Temperatures typically range between 6 °C (44 °F) and 26 °C (78 °F) through the year, but rarely can drop to -1 °C (30 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1609 mm (63.3 inches) and receives 143 rainy days on the 1 mm (0.04 inches) threshold annually. Hitachi enjoys an average of 3002 hours of sunshine throughout the year, and daylight varies from 9 hours 41 minutes to 14 hours 36 minutes per day.

Monthly average temperatures in Hitachi, Japan

The warmest months in Hitachi are July, August and September, with daily mean temperatures ranging from 23 to 26 °C (74 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 9 °C (44 - 48 °F) throughout the day. On average each year, Hitachi experiences 43 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 Hitachi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		16°C
(61°F)		18°C
(65°F)		21°C
(70°F)		24°C
(75°F)		27°C
(81°F)		29°C
(84°F)		31°C
(88°F)		29°C
(85°F)		26°C
(80°F)		21°C
(70°F)		19°C
(67°F)
Mean maximum12°C
(55°F)		14°C
(58°F)		16°C
(61°F)		19°C
(67°F)		23°C
(73°F)		24°C
(75°F)		28°C
(82°F)		30°C
(86°F)		28°C
(83°F)		24°C
(76°F)		20°C
(68°F)		16°C
(61°F)
Average high8°C
(47°F)		9°C
(48°F)		12°C
(53°F)		15°C
(58°F)		19°C
(66°F)		21°C
(71°F)		25°C
(77°F)		27°C
(81°F)		24°C
(76°F)		20°C
(68°F)		16°C
(61°F)		11°C
(52°F)
Daily mean6°C
(44°F)		7°C
(44°F)		9°C
(49°F)		13°C
(55°F)		17°C
(63°F)		20°C
(69°F)		24°C
(75°F)		26°C
(78°F)		23°C
(74°F)		19°C
(66°F)		14°C
(58°F)		9°C
(48°F)
Average low5°C
(41°F)		4°C
(40°F)		7°C
(45°F)		10°C
(51°F)		16°C
(60°F)		19°C
(66°F)		22°C
(73°F)		24°C
(76°F)		22°C
(71°F)		17°C
(63°F)		12°C
(54°F)		7°C
(45°F)
Mean minimum1°C
(35°F)		1°C
(34°F)		3°C
(38°F)		6°C
(43°F)		11°C
(52°F)		16°C
(62°F)		19°C
(67°F)		21°C
(71°F)		18°C
(65°F)		13°C
(55°F)		7°C
(45°F)		3°C
(37°F)
Minimum-1°C
(30°F)		-0°C
(32°F)		2°C
(36°F)		4°C
(40°F)		11°C
(52°F)		15°C
(60°F)		18°C
(65°F)		20°C
(68°F)		17°C
(63°F)		12°C
(53°F)		4°C
(40°F)		1°C
(35°F)

Compare climate in Hitachi with other places

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

Monthly average precipitation in Hitachi, Japan

Hitachi usually has the most precipitation in July, September and October, with an average of 16 rainy days and 207 mm (8.1 inches) of precipitation per month. The driest months in Hitachi are January, February and December. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hitachi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)59 (2.3)49 (1.9)162 (6.4)133 (5.2)146 (5.7)138 (5.4)197 (7.7)129 (5.1)172 (6.8)252 (9.9)98 (3.8)75 (3.0)
Average precipitation days (≥ 1 mm)69121212131812161599

Monthly sunshine hours in Hitachi, Japan

The sunniest months in Hitachi are April, May and August, when the sun shines an average of 9 hours 25 minutes a day. Least sunny months in Hitachi: January, October and December receive an average of 6 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hitachi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours185233258279289278261298247216230223
Mean daily daylight hours9h 57m10h 49m11h 57m13h 7m14h 6m14h 36m14h 21m13h 29m12h 23m11h 13m10h 12m9h 41m

Solar UV radiation in Hitachi, Japan

Hitachi 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 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 Hitachi UV Index data.

Average daily maximum UV levels by month for Hitachi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3579101111109753