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Monthly climate in Ojiya, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ojiya features a humid subtropical climate (Cfa). Temperatures typically range between 1 °C (34 °F) and 26 °C (80 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 2291 mm (90.2 inches) and receives 224 rainy days on the 1 mm (0.04 inches) threshold annually. Ojiya enjoys an average of 2939 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 40 minutes per day.

Monthly average temperatures in Ojiya, Japan

The warmest months in Ojiya are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (71 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (34 - 38 °F) throughout the day. On average each year, Ojiya experiences 90 days above 25 °C (77.0 °F) and 79 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ojiya. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		17°C
(63°F)		22°C
(72°F)		28°C
(82°F)		33°C
(91°F)		34°C
(93°F)		37°C
(99°F)		38°C
(100°F)		36°C
(98°F)		32°C
(90°F)		25°C
(78°F)		21°C
(69°F)
Mean maximum9°C
(49°F)		12°C
(54°F)		20°C
(68°F)		25°C
(78°F)		30°C
(87°F)		30°C
(86°F)		34°C
(94°F)		36°C
(98°F)		33°C
(91°F)		29°C
(84°F)		22°C
(72°F)		15°C
(59°F)
Average high4°C
(39°F)		5°C
(41°F)		11°C
(52°F)		16°C
(62°F)		23°C
(73°F)		25°C
(78°F)		29°C
(85°F)		31°C
(88°F)		26°C
(79°F)		20°C
(68°F)		14°C
(58°F)		7°C
(45°F)
Daily mean1°C
(34°F)		1°C
(35°F)		6°C
(43°F)		11°C
(52°F)		17°C
(63°F)		21°C
(69°F)		25°C
(77°F)		26°C
(80°F)		22°C
(71°F)		16°C
(61°F)		9°C
(49°F)		3°C
(38°F)
Average low-2°C
(28°F)		-2°C
(28°F)		1°C
(34°F)		6°C
(42°F)		12°C
(53°F)		16°C
(61°F)		21°C
(71°F)		22°C
(73°F)		18°C
(64°F)		12°C
(54°F)		5°C
(41°F)		-0°C
(31°F)
Mean minimum-8°C
(17°F)		-8°C
(19°F)		-5°C
(24°F)		-1°C
(30°F)		5°C
(41°F)		11°C
(53°F)		18°C
(66°F)		18°C
(64°F)		11°C
(53°F)		6°C
(43°F)		-3°C
(28°F)		-7°C
(19°F)
Minimum-12°C
(11°F)		-10°C
(13°F)		-8°C
(18°F)		-3°C
(26°F)		4°C
(39°F)		9°C
(48°F)		17°C
(63°F)		14°C
(57°F)		9°C
(48°F)		5°C
(41°F)		-5°C
(23°F)		-9°C
(16°F)

Compare climate in Ojiya with other places

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

Monthly average precipitation in Ojiya, Japan

Ojiya usually has the most precipitation in July, October and December, with an average of 20 rainy days and 265 mm (10.4 inches) of precipitation per month. The driest months in Ojiya are April, May and November. On average, 148 mm (5.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ojiya. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)200 (7.9)182 (7.2)159 (6.2)146 (5.8)147 (5.8)156 (6.1)360 (14.2)178 (7.0)179 (7.0)205 (8.1)150 (5.9)229 (9.0)
Average precipitation days (≥ 1 mm)212219161615222018151723

Monthly sunshine hours in Ojiya, Japan

The sunniest months in Ojiya are May, June and August, when the sun shines an average of 9 hours 33 minutes a day. Least sunny months in Ojiya: January, February and December receive an average of 6 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ojiya. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours162211254278301284271293249217215199
Mean daily daylight hours9h 53m10h 47m11h 57m13h 9m14h 9m14h 40m14h 25m13h 32m12h 23m11h 12m10h 10m9h 37m

Solar UV radiation in Ojiya, Japan

Ojiya 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 5. For more detailed information, check out our hourly Ojiya UV Index data.

Average daily maximum UV levels by month for Ojiya. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)4589101111119753