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Monthly climate in Izumo, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Izumo features a humid subtropical climate (Cfa). Temperatures typically range between 5 °C (42 °F) and 28 °C (82 °F) through the year, but rarely can drop to -8 °C (19 °F) or can rise to as high as 36 °C (96 °F). The average annual precipitation amounts to about 1757 mm (69.2 inches) and receives 158 rainy days on the 1 mm (0.04 inches) threshold annually. Izumo enjoys an average of 2999 hours of sunshine throughout the year, and daylight varies from 9 hours 48 minutes to 14 hours 29 minutes per day.

Monthly average temperatures in Izumo, Japan

The warmest months in Izumo are July, August and September, with daily mean temperatures ranging from 23 to 28 °C (74 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (42 - 46 °F) throughout the day. On average each year, Izumo experiences 82 days above 25 °C (77.0 °F) and 8 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Izumo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		19°C
(67°F)		21°C
(70°F)		24°C
(75°F)		27°C
(82°F)		32°C
(90°F)		35°C
(94°F)		36°C
(96°F)		34°C
(93°F)		30°C
(86°F)		24°C
(76°F)		21°C
(69°F)
Mean maximum13°C
(55°F)		14°C
(58°F)		19°C
(66°F)		23°C
(73°F)		27°C
(80°F)		28°C
(83°F)		33°C
(91°F)		35°C
(95°F)		32°C
(89°F)		28°C
(83°F)		21°C
(71°F)		16°C
(60°F)
Average high8°C
(46°F)		8°C
(47°F)		13°C
(55°F)		16°C
(62°F)		22°C
(71°F)		25°C
(76°F)		28°C
(83°F)		30°C
(87°F)		26°C
(79°F)		21°C
(70°F)		16°C
(61°F)		10°C
(50°F)
Daily mean5°C
(42°F)		6°C
(42°F)		9°C
(49°F)		13°C
(56°F)		18°C
(65°F)		22°C
(71°F)		26°C
(79°F)		28°C
(82°F)		23°C
(74°F)		18°C
(65°F)		13°C
(55°F)		7°C
(46°F)
Average low3°C
(37°F)		3°C
(37°F)		6°C
(43°F)		10°C
(49°F)		15°C
(59°F)		19°C
(66°F)		24°C
(75°F)		25°C
(77°F)		21°C
(70°F)		15°C
(60°F)		9°C
(49°F)		5°C
(41°F)
Mean minimum-1°C
(30°F)		-3°C
(27°F)		1°C
(35°F)		3°C
(38°F)		9°C
(49°F)		14°C
(58°F)		20°C
(68°F)		21°C
(70°F)		16°C
(61°F)		10°C
(51°F)		5°C
(41°F)		1°C
(33°F)
Minimum-4°C
(24°F)		-8°C
(19°F)		1°C
(34°F)		2°C
(35°F)		8°C
(47°F)		13°C
(55°F)		19°C
(67°F)		19°C
(67°F)		15°C
(59°F)		9°C
(49°F)		4°C
(39°F)		-0°C
(32°F)

Compare climate in Izumo with other places

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

Monthly average precipitation in Izumo, Japan

Izumo usually has the most precipitation in July, August and September, with an average of 15 rainy days and 256 mm (10.1 inches) of precipitation per month. The driest months in Izumo are January, February and November. On average, 75 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Izumo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)84 (3.3)89 (3.5)125 (4.9)113 (4.5)97 (3.8)173 (6.8)290 (11.4)252 (9.9)226 (8.9)150 (5.9)53 (2.1)105 (4.1)
Average precipitation days (≥ 1 mm)1414131081318141512918

Monthly sunshine hours in Izumo, Japan

The sunniest months in Izumo are May, June and August, when the sun shines an average of 9 hours 45 minutes a day. Least sunny months in Izumo: January, February and December receive an average of 6 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Izumo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours163211257279299294279303252243224191
Mean daily daylight hours10h 3m10h 53m11h 58m13h 5m14h 1m14h 29m14h 15m13h 26m12h 22m11h 15m10h 17m9h 48m

Solar UV radiation in Izumo, Japan

Izumo experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, 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 Izumo UV Index data.

Average daily maximum UV levels by month for Izumo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)458111111121210753