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Monthly climate in Asago, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Asago features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (36 °F) and 26 °C (80 °F) through the year, but rarely can drop to -12 °C (10 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2132 mm (83.9 inches) and receives 167 rainy days on the 1 mm (0.04 inches) threshold annually. Asago enjoys an average of 2847 hours of sunshine throughout the year, and daylight varies from 9 hours 48 minutes to 14 hours 28 minutes per day.

Monthly average temperatures in Asago, Japan

The warmest months in Asago are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (72 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (36 - 41 °F) throughout the day. On average each year, Asago experiences 81 days above 25 °C (77.0 °F) and 60 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Asago. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		20°C
(67°F)		23°C
(73°F)		26°C
(79°F)		30°C
(86°F)		30°C
(87°F)		36°C
(96°F)		36°C
(97°F)		33°C
(92°F)		29°C
(84°F)		22°C
(72°F)		20°C
(67°F)
Mean maximum12°C
(53°F)		14°C
(58°F)		20°C
(68°F)		24°C
(75°F)		28°C
(83°F)		28°C
(83°F)		33°C
(92°F)		35°C
(94°F)		31°C
(87°F)		28°C
(82°F)		21°C
(69°F)		15°C
(59°F)
Average high6°C
(43°F)		7°C
(45°F)		12°C
(54°F)		17°C
(63°F)		22°C
(72°F)		25°C
(77°F)		29°C
(84°F)		30°C
(87°F)		25°C
(78°F)		20°C
(68°F)		15°C
(59°F)		9°C
(48°F)
Daily mean2°C
(36°F)		3°C
(38°F)		7°C
(46°F)		12°C
(54°F)		17°C
(63°F)		21°C
(69°F)		25°C
(77°F)		26°C
(80°F)		22°C
(72°F)		16°C
(62°F)		10°C
(50°F)		5°C
(41°F)
Average low-1°C
(30°F)		-1°C
(31°F)		3°C
(37°F)		7°C
(45°F)		12°C
(55°F)		17°C
(62°F)		22°C
(72°F)		23°C
(74°F)		19°C
(66°F)		13°C
(56°F)		6°C
(43°F)		1°C
(34°F)
Mean minimum-8°C
(17°F)		-8°C
(18°F)		-3°C
(27°F)		-1°C
(31°F)		5°C
(41°F)		11°C
(52°F)		19°C
(66°F)		19°C
(67°F)		13°C
(56°F)		7°C
(45°F)		-0°C
(32°F)		-5°C
(23°F)
Minimum-12°C
(11°F)		-12°C
(10°F)		-3°C
(26°F)		-2°C
(28°F)		2°C
(36°F)		9°C
(48°F)		17°C
(63°F)		16°C
(62°F)		10°C
(50°F)		6°C
(44°F)		-1°C
(31°F)		-8°C
(18°F)

Compare climate in Asago with other places

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

Monthly average precipitation in Asago, Japan

Asago usually has the most precipitation in July, August and September, with an average of 18 rainy days and 322 mm (12.7 inches) of precipitation per month. The driest months in Asago are January, February and November. On average, 66 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Asago. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)68 (2.7)72 (2.8)134 (5.3)142 (5.6)148 (5.8)219 (8.6)376 (14.8)310 (12.2)279 (11.0)236 (9.3)58 (2.3)89 (3.5)
Average precipitation days (≥ 1 mm)13121312111521171614815

Monthly sunshine hours in Asago, Japan

The sunniest months in Asago are April, May and August, when the sun shines an average of 9 hours 6 minutes a day. Least sunny months in Asago: January, February and December receive an average of 6 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Asago. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours167205247269280262252286229222221201
Mean daily daylight hours10h 3m10h 53m11h 58m13h 4m14h 0m14h 28m14h 14m13h 25m12h 22m11h 16m10h 18m9h 48m

Solar UV radiation in Asago, Japan

Asago experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Asago UV Index data.

Average daily maximum UV levels by month for Asago. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468101111121210753