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Monthly climate in Tsuma, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tsuma features a humid subtropical climate (Cfa). Temperatures typically range between 10 °C (50 °F) and 28 °C (82 °F) through the year, but rarely can drop to 1 °C (35 °F) or can rise to as high as 33 °C (91 °F). The average annual precipitation amounts to about 2256 mm (88.8 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually. Tsuma enjoys an average of 3054 hours of sunshine throughout the year, and daylight varies from 10 hours 5 minutes to 14 hours 11 minutes per day.

Monthly average temperatures in Tsuma, Japan

The warmest months in Tsuma are July, August and September, with daily mean temperatures ranging from 26 to 28 °C (78 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (50 - 54 °F) throughout the day. On average each year, Tsuma experiences 92 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Tsuma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum19°C
(67°F)		20°C
(69°F)		22°C
(72°F)		24°C
(76°F)		27°C
(81°F)		29°C
(84°F)		31°C
(88°F)		33°C
(91°F)		31°C
(88°F)		29°C
(85°F)		24°C
(75°F)		21°C
(71°F)
Mean maximum18°C
(64°F)		18°C
(65°F)		20°C
(69°F)		23°C
(73°F)		25°C
(78°F)		27°C
(82°F)		30°C
(87°F)		31°C
(89°F)		31°C
(87°F)		27°C
(82°F)		23°C
(73°F)		19°C
(67°F)
Average high12°C
(55°F)		13°C
(56°F)		16°C
(61°F)		19°C
(66°F)		22°C
(72°F)		25°C
(76°F)		28°C
(82°F)		29°C
(85°F)		27°C
(81°F)		23°C
(74°F)		19°C
(66°F)		14°C
(58°F)
Daily mean10°C
(50°F)		10°C
(51°F)		14°C
(57°F)		17°C
(62°F)		20°C
(69°F)		23°C
(74°F)		26°C
(80°F)		28°C
(82°F)		26°C
(78°F)		22°C
(71°F)		17°C
(63°F)		12°C
(54°F)
Average low8°C
(46°F)		8°C
(47°F)		11°C
(52°F)		14°C
(58°F)		18°C
(65°F)		22°C
(71°F)		25°C
(77°F)		26°C
(80°F)		24°C
(76°F)		20°C
(68°F)		15°C
(59°F)		10°C
(50°F)
Mean minimum3°C
(38°F)		4°C
(39°F)		7°C
(44°F)		9°C
(49°F)		14°C
(57°F)		19°C
(67°F)		23°C
(74°F)		24°C
(76°F)		21°C
(70°F)		15°C
(60°F)		10°C
(50°F)		4°C
(40°F)
Minimum1°C
(35°F)		2°C
(36°F)		6°C
(43°F)		8°C
(47°F)		12°C
(54°F)		18°C
(64°F)		22°C
(72°F)		24°C
(75°F)		20°C
(67°F)		14°C
(57°F)		9°C
(48°F)		3°C
(38°F)

Compare climate in Tsuma with other places

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

Monthly average precipitation in Tsuma, Japan

Tsuma usually has the most precipitation in June, July and September, with an average of 18 rainy days and 316 mm (12.4 inches) of precipitation per month. The driest months in Tsuma are January, November and December. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tsuma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)59 (2.3)107 (4.2)170 (6.7)139 (5.5)218 (8.6)299 (11.8)332 (13.1)236 (9.3)317 (12.5)223 (8.8)88 (3.4)68 (2.7)
Average precipitation days (≥ 1 mm)59131012171916181187

Monthly sunshine hours in Tsuma, Japan

The sunniest months in Tsuma are April, May and August, when the sun shines an average of 9 hours 21 minutes a day. Least sunny months in Tsuma: January, February and December receive an average of 7 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tsuma. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours197232269285272245270303257253234232
Mean daily daylight hours10h 18m11h 2m11h 58m12h 57m13h 46m14h 11m13h 58m13h 15m12h 20m11h 21m10h 31m10h 5m

Solar UV radiation in Tsuma, Japan

Tsuma experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Tsuma UV Index data.

Average daily maximum UV levels by month for Tsuma. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)569101212121211864