nomadseason

Monthly climate in Otsuchi, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Otsuchi features a oceanic climate (Cfb). Temperatures typically range between 2 °C (37 °F) and 22 °C (72 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 28 °C (82 °F). The average annual precipitation amounts to about 1520 mm (59.8 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually. Otsuchi enjoys an average of 2992 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 52 minutes per day.

Monthly average temperatures in Otsuchi, Japan

The warmest months in Otsuchi are July, August and September, with daily mean temperatures ranging from 20 to 22 °C (69 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (37 - 42 °F) throughout the day. On average each year, Otsuchi experiences 8 days above 25 °C (77.0 °F) and 26 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Otsuchi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(53°F)		12°C
(53°F)		14°C
(58°F)		16°C
(62°F)		22°C
(73°F)		22°C
(73°F)		27°C
(81°F)		28°C
(82°F)		27°C
(80°F)		24°C
(76°F)		18°C
(64°F)		15°C
(60°F)
Mean maximum10°C
(50°F)		10°C
(50°F)		11°C
(53°F)		14°C
(58°F)		19°C
(66°F)		20°C
(69°F)		25°C
(77°F)		27°C
(81°F)		25°C
(77°F)		22°C
(71°F)		17°C
(63°F)		14°C
(57°F)
Average high5°C
(40°F)		5°C
(41°F)		7°C
(45°F)		10°C
(50°F)		14°C
(57°F)		17°C
(63°F)		21°C
(70°F)		23°C
(74°F)		21°C
(71°F)		18°C
(64°F)		13°C
(55°F)		7°C
(45°F)
Daily mean3°C
(37°F)		2°C
(37°F)		5°C
(42°F)		8°C
(47°F)		12°C
(55°F)		16°C
(61°F)		20°C
(69°F)		22°C
(72°F)		20°C
(69°F)		16°C
(61°F)		11°C
(52°F)		5°C
(42°F)
Average low1°C
(34°F)		0°C
(33°F)		3°C
(38°F)		7°C
(44°F)		11°C
(52°F)		15°C
(59°F)		19°C
(67°F)		21°C
(71°F)		19°C
(67°F)		15°C
(59°F)		9°C
(48°F)		3°C
(38°F)
Mean minimum-4°C
(25°F)		-4°C
(26°F)		-0°C
(32°F)		3°C
(38°F)		8°C
(46°F)		12°C
(54°F)		16°C
(61°F)		18°C
(65°F)		16°C
(61°F)		10°C
(50°F)		3°C
(38°F)		-2°C
(29°F)
Minimum-7°C
(20°F)		-4°C
(25°F)		-3°C
(26°F)		1°C
(35°F)		7°C
(44°F)		11°C
(52°F)		15°C
(59°F)		18°C
(64°F)		14°C
(57°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(26°F)

Compare climate in Otsuchi with other places

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

Monthly average precipitation in Otsuchi, Japan

Otsuchi usually has the most precipitation in August, September and October, with an average of 14 rainy days and 209 mm (8.2 inches) of precipitation per month. The driest months in Otsuchi are January, February and November. On average, 56 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Otsuchi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)51 (2.0)59 (2.3)115 (4.5)127 (5.0)116 (4.6)120 (4.7)175 (6.9)200 (7.9)185 (7.3)243 (9.6)57 (2.3)71 (2.8)
Average precipitation days (≥ 1 mm)981011111317181313710

Monthly sunshine hours in Otsuchi, Japan

The sunniest months in Otsuchi are April, May and June, when the sun shines an average of 9 hours 37 minutes a day. Least sunny months in Otsuchi: January, November and December receive an average of 6 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Otsuchi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours170225267277304292275271253222220209
Mean daily daylight hours9h 43m10h 41m11h 57m13h 14m14h 19m14h 52m14h 36m13h 39m12h 25m11h 8m10h 0m9h 26m

Solar UV radiation in Otsuchi, Japan

Otsuchi 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 4. For more detailed information, check out our hourly Otsuchi UV Index data.

Average daily maximum UV levels by month for Otsuchi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891110109643