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Monthly climate in Mizusawa, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mizusawa features a humid subtropical climate (Cfa). Temperatures typically range between -2 °C (30 °F) and 23 °C (74 °F) through the year, but rarely can drop to -22 °C (-8 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 1348 mm (53.1 inches) and receives 168 rainy days on the 1 mm (0.04 inches) threshold annually. Mizusawa enjoys an average of 2821 hours of sunshine throughout the year, and daylight varies from 9 hours 27 minutes to 14 hours 51 minutes per day.

Monthly average temperatures in Mizusawa, Japan

The warmest months in Mizusawa are July, August and September, with daily mean temperatures ranging from 19 to 23 °C (67 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (30 - 33 °F) throughout the day. On average each year, Mizusawa experiences 46 days above 25 °C (77.0 °F) and 109 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mizusawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(45°F)		11°C
(52°F)		20°C
(68°F)		25°C
(77°F)		30°C
(87°F)		30°C
(87°F)		33°C
(92°F)		34°C
(94°F)		33°C
(91°F)		27°C
(80°F)		19°C
(66°F)		14°C
(58°F)
Mean maximum6°C
(44°F)		9°C
(49°F)		17°C
(63°F)		21°C
(70°F)		26°C
(80°F)		27°C
(80°F)		31°C
(88°F)		32°C
(90°F)		29°C
(84°F)		24°C
(76°F)		18°C
(64°F)		11°C
(52°F)
Average high2°C
(35°F)		3°C
(37°F)		8°C
(47°F)		13°C
(56°F)		19°C
(67°F)		22°C
(72°F)		26°C
(79°F)		27°C
(81°F)		23°C
(74°F)		17°C
(63°F)		11°C
(52°F)		4°C
(39°F)
Daily mean-2°C
(30°F)		-1°C
(31°F)		4°C
(39°F)		8°C
(47°F)		14°C
(58°F)		18°C
(65°F)		22°C
(72°F)		23°C
(74°F)		19°C
(67°F)		13°C
(55°F)		6°C
(44°F)		1°C
(33°F)
Average low-5°C
(24°F)		-4°C
(24°F)		-0°C
(32°F)		3°C
(38°F)		10°C
(50°F)		14°C
(57°F)		19°C
(67°F)		20°C
(69°F)		15°C
(60°F)		9°C
(48°F)		2°C
(36°F)		-2°C
(28°F)
Mean minimum-12°C
(10°F)		-12°C
(10°F)		-5°C
(23°F)		-3°C
(28°F)		4°C
(39°F)		10°C
(50°F)		15°C
(58°F)		15°C
(59°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(26°F)		-9°C
(17°F)
Minimum-22°C
(-8°F)		-18°C
(-0°F)		-12°C
(11°F)		-6°C
(21°F)		3°C
(38°F)		7°C
(44°F)		14°C
(57°F)		10°C
(51°F)		4°C
(39°F)		0°C
(33°F)		-4°C
(24°F)		-10°C
(14°F)

Compare climate in Mizusawa with other places

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

Monthly average precipitation in Mizusawa, Japan

Mizusawa usually has the most precipitation in July, August and October, with an average of 15 rainy days and 168 mm (6.6 inches) of precipitation per month. The driest months in Mizusawa are January, February and November. On average, 60 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mizusawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)56 (2.2)69 (2.7)106 (4.2)119 (4.7)114 (4.5)129 (5.1)182 (7.2)167 (6.6)117 (4.6)154 (6.1)56 (2.2)78 (3.1)
Average precipitation days (≥ 1 mm)121414151314171812121017

Monthly sunshine hours in Mizusawa, Japan

The sunniest months in Mizusawa are April, May and June, when the sun shines an average of 9 hours 2 minutes a day. Least sunny months in Mizusawa: January, October and December receive an average of 6 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mizusawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours164217255262289270250251239207213199
Mean daily daylight hours9h 44m10h 42m11h 57m13h 13m14h 18m14h 51m14h 35m13h 38m12h 24m11h 8m10h 1m9h 27m

Solar UV radiation in Mizusawa, Japan

Mizusawa experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High 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 Mizusawa UV Index data.

Average daily maximum UV levels by month for Mizusawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891010109643