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Monthly climate in Yamaga, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Yamaga features a humid subtropical climate (Cfa). Temperatures typically range between 6 °C (42 °F) and 28 °C (82 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 2077 mm (81.8 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually. Yamaga enjoys an average of 2984 hours of sunshine throughout the year, and daylight varies from 10 hours 0 minutes to 14 hours 16 minutes per day.

Monthly average temperatures in Yamaga, Japan

The warmest months in Yamaga are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (76 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 7 °C (42 - 45 °F) throughout the day. On average each year, Yamaga experiences 109 days above 25 °C (77.0 °F) and 21 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yamaga. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(63°F)		20°C
(69°F)		24°C
(75°F)		28°C
(82°F)		30°C
(86°F)		32°C
(89°F)		35°C
(96°F)		35°C
(96°F)		34°C
(94°F)		31°C
(88°F)		25°C
(77°F)		22°C
(72°F)
Mean maximum15°C
(60°F)		17°C
(63°F)		21°C
(71°F)		26°C
(78°F)		28°C
(83°F)		30°C
(86°F)		33°C
(92°F)		35°C
(95°F)		33°C
(91°F)		29°C
(84°F)		23°C
(74°F)		19°C
(66°F)
Average high10°C
(50°F)		11°C
(52°F)		16°C
(60°F)		20°C
(68°F)		24°C
(75°F)		27°C
(80°F)		29°C
(85°F)		31°C
(89°F)		28°C
(82°F)		24°C
(75°F)		18°C
(64°F)		11°C
(53°F)
Daily mean6°C
(42°F)		7°C
(44°F)		11°C
(52°F)		15°C
(59°F)		19°C
(67°F)		23°C
(73°F)		26°C
(79°F)		28°C
(82°F)		24°C
(76°F)		19°C
(66°F)		12°C
(55°F)		7°C
(45°F)
Average low2°C
(36°F)		2°C
(36°F)		6°C
(43°F)		10°C
(51°F)		15°C
(59°F)		19°C
(67°F)		23°C
(74°F)		24°C
(76°F)		21°C
(70°F)		15°C
(59°F)		8°C
(46°F)		3°C
(38°F)
Mean minimum-3°C
(27°F)		-2°C
(28°F)		0°C
(32°F)		3°C
(37°F)		8°C
(47°F)		15°C
(59°F)		20°C
(69°F)		21°C
(70°F)		15°C
(59°F)		8°C
(46°F)		1°C
(34°F)		-2°C
(30°F)
Minimum-5°C
(24°F)		-5°C
(24°F)		-1°C
(30°F)		1°C
(34°F)		6°C
(43°F)		13°C
(55°F)		17°C
(63°F)		18°C
(65°F)		12°C
(53°F)		6°C
(44°F)		-1°C
(30°F)		-2°C
(29°F)

Compare climate in Yamaga with other places

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

Monthly average precipitation in Yamaga, Japan

Yamaga usually has the most precipitation in June, July and August, with an average of 16 rainy days and 343 mm (13.5 inches) of precipitation per month. The driest months in Yamaga are January, November and December. On average, 62 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yamaga. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)54 (2.1)96 (3.8)131 (5.2)132 (5.2)213 (8.4)274 (10.8)478 (18.8)277 (10.9)184 (7.2)107 (4.2)60 (2.4)71 (2.8)
Average precipitation days (≥ 1 mm)6101291215201514877

Monthly sunshine hours in Yamaga, Japan

The sunniest months in Yamaga are April, May and August, when the sun shines an average of 9 hours 16 minutes a day. Least sunny months in Yamaga: January, November and December receive an average of 6 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yamaga. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours177232259276283253262293248247231218
Mean daily daylight hours10h 14m10h 59m11h 58m12h 59m13h 50m14h 16m14h 3m13h 18m12h 20m11h 20m10h 27m10h 0m

Solar UV radiation in Yamaga, Japan

Yamaga 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 / 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 Yamaga UV Index data.

Average daily maximum UV levels by month for Yamaga. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468111111121211864