nomadseason

Monthly climate in Shiozawa, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Shiozawa features a humid subtropical climate (Cfa). Temperatures typically range between -3 °C (28 °F) and 24 °C (75 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 33 °C (91 °F). The average annual precipitation amounts to about 2571 mm (101.2 inches) and receives 239 rainy days on the 1 mm (0.04 inches) threshold annually. Shiozawa enjoys an average of 2939 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 38 minutes per day.

Monthly average temperatures in Shiozawa, Japan

The warmest months in Shiozawa are July, August and September, with daily mean temperatures ranging from 19 to 24 °C (67 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 0 °C (28 - 32 °F) throughout the day. On average each year, Shiozawa experiences 52 days above 25 °C (77.0 °F) and 112 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Shiozawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(47°F)		14°C
(57°F)		20°C
(68°F)		26°C
(79°F)		30°C
(86°F)		30°C
(86°F)		32°C
(90°F)		33°C
(91°F)		31°C
(89°F)		27°C
(81°F)		21°C
(71°F)		18°C
(65°F)
Mean maximum6°C
(43°F)		9°C
(48°F)		16°C
(61°F)		22°C
(71°F)		27°C
(82°F)		26°C
(80°F)		31°C
(87°F)		32°C
(90°F)		28°C
(83°F)		26°C
(78°F)		19°C
(66°F)		12°C
(54°F)
Average high1°C
(34°F)		2°C
(35°F)		7°C
(45°F)		13°C
(56°F)		20°C
(68°F)		22°C
(72°F)		26°C
(79°F)		28°C
(82°F)		23°C
(74°F)		17°C
(63°F)		11°C
(52°F)		4°C
(39°F)
Daily mean-3°C
(28°F)		-2°C
(29°F)		3°C
(37°F)		8°C
(46°F)		15°C
(58°F)		18°C
(64°F)		22°C
(73°F)		24°C
(75°F)		19°C
(67°F)		13°C
(56°F)		6°C
(44°F)		-0°C
(32°F)
Average low-6°C
(22°F)		-6°C
(22°F)		-2°C
(29°F)		3°C
(38°F)		9°C
(49°F)		14°C
(57°F)		19°C
(67°F)		20°C
(69°F)		16°C
(60°F)		10°C
(50°F)		2°C
(36°F)		-4°C
(25°F)
Mean minimum-12°C
(10°F)		-11°C
(12°F)		-8°C
(17°F)		-5°C
(24°F)		2°C
(35°F)		9°C
(48°F)		16°C
(61°F)		15°C
(60°F)		9°C
(49°F)		3°C
(38°F)		-6°C
(21°F)		-12°C
(11°F)
Minimum-14°C
(6°F)		-19°C
(-2°F)		-10°C
(14°F)		-7°C
(20°F)		1°C
(34°F)		6°C
(43°F)		14°C
(58°F)		10°C
(50°F)		6°C
(43°F)		2°C
(36°F)		-9°C
(17°F)		-14°C
(7°F)

Compare climate in Shiozawa with other places

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

Monthly average precipitation in Shiozawa, Japan

Shiozawa usually has the most precipitation in July, August and October, with an average of 21 rainy days and 290 mm (11.4 inches) of precipitation per month. The driest months in Shiozawa are March, April and November. On average, 162 mm (6.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Shiozawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)199 (7.8)185 (7.3)174 (6.9)167 (6.6)181 (7.1)201 (7.9)376 (14.8)238 (9.4)223 (8.8)256 (10.1)145 (5.7)226 (8.9)
Average precipitation days (≥ 1 mm)222220181618242219181822

Monthly sunshine hours in Shiozawa, Japan

The sunniest months in Shiozawa are May, June and August, when the sun shines an average of 9 hours 33 minutes a day. Least sunny months in Shiozawa: 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 Shiozawa. 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 55m10h 48m11h 57m13h 8m14h 8m14h 38m14h 23m13h 31m12h 23m11h 12m10h 10m9h 39m

Solar UV radiation in Shiozawa, Japan

Shiozawa 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 Shiozawa UV Index data.

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