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Monthly climate in Izu, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Izu features a humid subtropical climate (Cfa). Temperatures typically range between 7 °C (44 °F) and 27 °C (81 °F) through the year, but rarely can drop to -2 °C (29 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 2168 mm (85.4 inches) and receives 156 rainy days on the 1 mm (0.04 inches) threshold annually. Izu enjoys an average of 2859 hours of sunshine throughout the year, and daylight varies from 9 hours 49 minutes to 14 hours 27 minutes per day.

Monthly average temperatures in Izu, Japan

The warmest months in Izu are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (74 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (44 - 49 °F) throughout the day. On average each year, Izu experiences 79 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Izu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(64°F)		19°C
(67°F)		22°C
(72°F)		24°C
(76°F)		28°C
(82°F)		29°C
(85°F)		33°C
(92°F)		34°C
(94°F)		33°C
(91°F)		29°C
(84°F)		22°C
(72°F)		21°C
(69°F)
Mean maximum15°C
(59°F)		16°C
(62°F)		20°C
(68°F)		22°C
(73°F)		26°C
(80°F)		27°C
(81°F)		31°C
(88°F)		33°C
(92°F)		31°C
(88°F)		27°C
(82°F)		21°C
(71°F)		17°C
(64°F)
Average high9°C
(49°F)		10°C
(51°F)		14°C
(57°F)		17°C
(63°F)		22°C
(71°F)		24°C
(76°F)		28°C
(82°F)		30°C
(86°F)		26°C
(79°F)		21°C
(71°F)		17°C
(63°F)		12°C
(54°F)
Daily mean7°C
(44°F)		7°C
(45°F)		11°C
(51°F)		14°C
(57°F)		18°C
(65°F)		21°C
(71°F)		25°C
(77°F)		27°C
(81°F)		23°C
(74°F)		19°C
(66°F)		14°C
(58°F)		9°C
(49°F)
Average low4°C
(39°F)		4°C
(40°F)		7°C
(45°F)		11°C
(52°F)		15°C
(60°F)		19°C
(66°F)		23°C
(73°F)		25°C
(77°F)		21°C
(70°F)		16°C
(62°F)		12°C
(53°F)		6°C
(44°F)
Mean minimum-1°C
(31°F)		-1°C
(31°F)		2°C
(36°F)		5°C
(42°F)		10°C
(51°F)		16°C
(61°F)		20°C
(68°F)		21°C
(70°F)		17°C
(63°F)		12°C
(54°F)		6°C
(42°F)		1°C
(35°F)
Minimum-2°C
(29°F)		-1°C
(30°F)		1°C
(34°F)		3°C
(38°F)		9°C
(48°F)		15°C
(59°F)		18°C
(65°F)		20°C
(68°F)		15°C
(60°F)		11°C
(52°F)		3°C
(38°F)		-0°C
(32°F)

Compare climate in Izu with other places

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

Monthly average precipitation in Izu, Japan

Izu usually has the most precipitation in June, July and October, with an average of 17 rainy days and 298 mm (11.7 inches) of precipitation per month. The driest months in Izu are January, February and December. On average, 75 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Izu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)68 (2.7)83 (3.2)196 (7.7)168 (6.6)194 (7.6)263 (10.3)326 (12.8)176 (6.9)221 (8.7)305 (12.0)94 (3.7)74 (2.9)
Average precipitation days (≥ 1 mm)581311121719172016108

Monthly sunshine hours in Izu, Japan

The sunniest months in Izu are April, May and August, when the sun shines an average of 8 hours 59 minutes a day. Least sunny months in Izu: January, October and November receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Izu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours188224249260281252228285236201222226
Mean daily daylight hours10h 4m10h 53m11h 58m13h 4m14h 0m14h 27m14h 14m13h 25m12h 22m11h 16m10h 18m9h 49m

Solar UV radiation in Izu, Japan

Izu experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, November 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 Izu UV Index data.

Average daily maximum UV levels by month for Izu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468101111121110754