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Monthly climate in Ajigasawa, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ajigasawa features a humid subtropical climate (Cfa). Temperatures typically range between -1 °C (31 °F) and 24 °C (75 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 1777 mm (70.0 inches) and receives 212 rainy days on the 1 mm (0.04 inches) threshold annually. Ajigasawa enjoys an average of 2952 hours of sunshine throughout the year, and daylight varies from 9 hours 17 minutes to 15 hours 1 minutes per day.

Monthly average temperatures in Ajigasawa, Japan

The warmest months in Ajigasawa are July, August and September, with daily mean temperatures ranging from 20 to 24 °C (68 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 2 °C (31 - 35 °F) throughout the day. On average each year, Ajigasawa experiences 34 days above 25 °C (77.0 °F) and 78 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ajigasawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(45°F)		8°C
(47°F)		15°C
(59°F)		21°C
(70°F)		25°C
(77°F)		26°C
(80°F)		32°C
(89°F)		33°C
(92°F)		33°C
(91°F)		25°C
(77°F)		19°C
(67°F)		13°C
(55°F)
Mean maximum6°C
(43°F)		7°C
(45°F)		12°C
(54°F)		18°C
(64°F)		23°C
(73°F)		23°C
(73°F)		29°C
(85°F)		31°C
(88°F)		28°C
(84°F)		23°C
(73°F)		18°C
(65°F)		11°C
(51°F)
Average high1°C
(34°F)		2°C
(35°F)		6°C
(43°F)		11°C
(52°F)		17°C
(63°F)		20°C
(69°F)		25°C
(77°F)		26°C
(79°F)		23°C
(73°F)		17°C
(63°F)		10°C
(51°F)		3°C
(38°F)
Daily mean-1°C
(31°F)		-0°C
(32°F)		3°C
(38°F)		8°C
(46°F)		14°C
(57°F)		18°C
(64°F)		22°C
(73°F)		24°C
(75°F)		20°C
(68°F)		14°C
(58°F)		8°C
(47°F)		2°C
(35°F)
Average low-3°C
(28°F)		-2°C
(28°F)		1°C
(34°F)		5°C
(41°F)		11°C
(51°F)		15°C
(59°F)		20°C
(68°F)		21°C
(70°F)		17°C
(63°F)		11°C
(53°F)		5°C
(42°F)		-0°C
(32°F)
Mean minimum-7°C
(19°F)		-7°C
(20°F)		-4°C
(25°F)		-0°C
(32°F)		6°C
(43°F)		11°C
(51°F)		16°C
(60°F)		17°C
(63°F)		12°C
(55°F)		6°C
(44°F)		-0°C
(32°F)		-5°C
(22°F)
Minimum-10°C
(14°F)		-8°C
(18°F)		-6°C
(21°F)		-2°C
(28°F)		6°C
(42°F)		9°C
(48°F)		14°C
(58°F)		16°C
(61°F)		10°C
(51°F)		5°C
(41°F)		-3°C
(28°F)		-7°C
(19°F)

Compare climate in Ajigasawa with other places

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

Monthly average precipitation in Ajigasawa, Japan

Ajigasawa usually has the most precipitation in August, October and December, with an average of 19 rainy days and 197 mm (7.7 inches) of precipitation per month. The driest months in Ajigasawa are March, April and May. On average, 119 mm (4.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ajigasawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)125 (4.9)141 (5.6)120 (4.7)122 (4.8)115 (4.5)139 (5.5)130 (5.1)187 (7.4)144 (5.7)192 (7.5)151 (6.0)211 (8.3)
Average precipitation days (≥ 1 mm)212418151313141614162127

Monthly sunshine hours in Ajigasawa, Japan

The sunniest months in Ajigasawa are May, June and July, when the sun shines an average of 10 hours 0 minutes a day. Least sunny months in Ajigasawa: January, November and December receive an average of 5 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ajigasawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours151195249278303299318296263227191177
Mean daily daylight hours9h 36m10h 37m11h 56m13h 17m14h 27m15h 1m14h 44m13h 43m12h 26m11h 5m9h 54m9h 17m

Solar UV radiation in Ajigasawa, Japan

Ajigasawa experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme 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 4. For more detailed information, check out our hourly Ajigasawa UV Index data.

Average daily maximum UV levels by month for Ajigasawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891010118642