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Monthly climate in Asahi, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Asahi features a humid subtropical climate (Cfa). Temperatures typically range between 8 °C (46 °F) and 27 °C (80 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1703 mm (67.1 inches) and receives 150 rainy days on the 1 mm (0.04 inches) threshold annually. Asahi enjoys an average of 3001 hours of sunshine throughout the year, and daylight varies from 9 hours 46 minutes to 14 hours 31 minutes per day.

Monthly average temperatures in Asahi, Japan

The warmest months in Asahi are July, August and September, with daily mean temperatures ranging from 24 to 27 °C (76 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (46 - 51 °F) throughout the day. On average each year, Asahi experiences 65 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 Asahi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(63°F)		18°C
(65°F)		20°C
(69°F)		23°C
(74°F)		26°C
(78°F)		28°C
(83°F)		30°C
(87°F)		32°C
(90°F)		32°C
(89°F)		29°C
(84°F)		22°C
(72°F)		21°C
(70°F)
Mean maximum15°C
(60°F)		16°C
(61°F)		19°C
(66°F)		22°C
(71°F)		25°C
(77°F)		26°C
(78°F)		29°C
(85°F)		31°C
(89°F)		30°C
(86°F)		26°C
(80°F)		22°C
(71°F)		18°C
(65°F)
Average high10°C
(50°F)		10°C
(51°F)		14°C
(57°F)		17°C
(62°F)		21°C
(69°F)		23°C
(74°F)		26°C
(80°F)		29°C
(84°F)		26°C
(78°F)		22°C
(71°F)		17°C
(63°F)		12°C
(54°F)
Daily mean8°C
(46°F)		8°C
(47°F)		11°C
(53°F)		14°C
(58°F)		19°C
(66°F)		21°C
(71°F)		25°C
(77°F)		27°C
(80°F)		24°C
(76°F)		20°C
(68°F)		15°C
(60°F)		10°C
(51°F)
Average low5°C
(42°F)		5°C
(42°F)		9°C
(48°F)		12°C
(54°F)		17°C
(62°F)		20°C
(68°F)		23°C
(74°F)		25°C
(78°F)		23°C
(73°F)		18°C
(65°F)		14°C
(57°F)		8°C
(47°F)
Mean minimum2°C
(35°F)		2°C
(36°F)		4°C
(40°F)		7°C
(45°F)		12°C
(54°F)		17°C
(64°F)		20°C
(69°F)		22°C
(72°F)		19°C
(67°F)		13°C
(57°F)		8°C
(47°F)		3°C
(38°F)
Minimum0°C
(32°F)		1°C
(33°F)		3°C
(38°F)		5°C
(41°F)		11°C
(53°F)		16°C
(62°F)		20°C
(68°F)		21°C
(70°F)		18°C
(64°F)		12°C
(53°F)		6°C
(43°F)		1°C
(35°F)

Compare climate in Asahi with other places

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

Monthly average precipitation in Asahi, Japan

Asahi usually has the most precipitation in July, September and October, with an average of 16 rainy days and 220 mm (8.7 inches) of precipitation per month. The driest months in Asahi are January, February and August. On average, 73 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Asahi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.6)59 (2.3)161 (6.3)116 (4.6)144 (5.7)184 (7.2)201 (7.9)94 (3.7)185 (7.3)274 (10.8)124 (4.9)96 (3.8)
Average precipitation days (≥ 1 mm)71015111213151216171210

Monthly sunshine hours in Asahi, Japan

The sunniest months in Asahi are May, July and August, when the sun shines an average of 9 hours 27 minutes a day. Least sunny months in Asahi: January, October and December receive an average of 6 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Asahi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours184225251276291272277310251217222220
Mean daily daylight hours10h 1m10h 52m11h 57m13h 5m14h 2m14h 31m14h 17m13h 27m12h 22m11h 15m10h 16m9h 46m

Solar UV radiation in Asahi, Japan

Asahi experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, February 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 Asahi UV Index data.

Average daily maximum UV levels by month for Asahi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)358101111111010754