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Monthly climate in Suttsu, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Suttsu features a humid continental climate (Dfb). Temperatures typically range between -3 °C (28 °F) and 21 °C (70 °F) through the year, but rarely can drop to -12 °C (10 °F) or can rise to as high as 29 °C (84 °F). The average annual precipitation amounts to about 1622 mm (63.9 inches) and receives 204 rainy days on the 1 mm (0.04 inches) threshold annually. Suttsu enjoys an average of 2954 hours of sunshine throughout the year, and daylight varies from 9 hours 5 minutes to 15 hours 14 minutes per day.

Monthly average temperatures in Suttsu, Japan

The warmest months in Suttsu are July, August and September, with daily mean temperatures ranging from 19 to 21 °C (66 - 70 °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 - 31 °F) throughout the day. On average each year, Suttsu experiences 7 days above 25 °C (77.0 °F) and 100 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Suttsu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum5°C
(41°F)		7°C
(44°F)		11°C
(53°F)		14°C
(58°F)		21°C
(70°F)		22°C
(71°F)		27°C
(81°F)		29°C
(84°F)		27°C
(81°F)		22°C
(72°F)		16°C
(60°F)		11°C
(53°F)
Mean maximum4°C
(39°F)		5°C
(41°F)		9°C
(48°F)		13°C
(56°F)		19°C
(66°F)		19°C
(67°F)		26°C
(78°F)		27°C
(80°F)		24°C
(76°F)		20°C
(69°F)		15°C
(59°F)		9°C
(48°F)
Average high-1°C
(30°F)		-1°C
(31°F)		3°C
(39°F)		8°C
(46°F)		13°C
(56°F)		17°C
(62°F)		21°C
(71°F)		23°C
(73°F)		20°C
(69°F)		15°C
(59°F)		8°C
(47°F)		1°C
(34°F)
Daily mean-3°C
(28°F)		-3°C
(28°F)		1°C
(35°F)		5°C
(42°F)		11°C
(52°F)		15°C
(59°F)		20°C
(67°F)		21°C
(70°F)		19°C
(66°F)		13°C
(56°F)		6°C
(44°F)		-0°C
(31°F)
Average low-4°C
(25°F)		-4°C
(25°F)		-1°C
(31°F)		3°C
(38°F)		9°C
(48°F)		13°C
(55°F)		18°C
(64°F)		19°C
(67°F)		17°C
(62°F)		11°C
(52°F)		5°C
(41°F)		-2°C
(28°F)
Mean minimum-10°C
(14°F)		-9°C
(15°F)		-5°C
(24°F)		-0°C
(32°F)		5°C
(42°F)		9°C
(49°F)		15°C
(59°F)		16°C
(61°F)		13°C
(56°F)		6°C
(43°F)		-1°C
(30°F)		-8°C
(19°F)
Minimum-11°C
(12°F)		-12°C
(10°F)		-6°C
(21°F)		-2°C
(29°F)		5°C
(40°F)		8°C
(47°F)		13°C
(55°F)		15°C
(59°F)		11°C
(53°F)		5°C
(42°F)		-4°C
(25°F)		-8°C
(18°F)

Compare climate in Suttsu with other places

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

Monthly average precipitation in Suttsu, Japan

Suttsu usually has the most precipitation in October, November and December, with an average of 23 rainy days and 187 mm (7.4 inches) of precipitation per month. The driest months in Suttsu are March, April and May. On average, 96 mm (3.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Suttsu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)117 (4.6)114 (4.5)104 (4.1)93 (3.7)90 (3.5)119 (4.7)116 (4.6)158 (6.2)151 (5.9)165 (6.5)199 (7.8)197 (7.7)
Average precipitation days (≥ 1 mm)202216121311111415182428

Monthly sunshine hours in Suttsu, Japan

The sunniest months in Suttsu are May, June and July, when the sun shines an average of 10 hours 2 minutes a day. Least sunny months in Suttsu: January, November and December receive an average of 5 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Suttsu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours135192251291311296314294273239185168
Mean daily daylight hours9h 25m10h 31m11h 56m13h 23m14h 37m15h 14m14h 55m13h 51m12h 27m11h 1m9h 45m9h 5m

Solar UV radiation in Suttsu, Japan

Suttsu 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 Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Suttsu UV Index data.

Average daily maximum UV levels by month for Suttsu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)236791010108532