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Monthly climate in Agano, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Agano features a humid subtropical climate (Cfa). Temperatures typically range between 1 °C (33 °F) and 26 °C (79 °F) through the year, but rarely can drop to -11 °C (13 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 2376 mm (93.5 inches) and receives 231 rainy days on the 1 mm (0.04 inches) threshold annually. Agano enjoys an average of 2873 hours of sunshine throughout the year, and daylight varies from 9 hours 34 minutes to 14 hours 43 minutes per day.

Monthly average temperatures in Agano, Japan

The warmest months in Agano are July, August and September, with daily mean temperatures ranging from 21 to 26 °C (71 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (33 - 38 °F) throughout the day. On average each year, Agano experiences 79 days above 25 °C (77.0 °F) and 75 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Agano. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		15°C
(59°F)		21°C
(70°F)		26°C
(79°F)		32°C
(89°F)		32°C
(91°F)		36°C
(97°F)		37°C
(99°F)		36°C
(97°F)		31°C
(88°F)		24°C
(75°F)		19°C
(67°F)
Mean maximum7°C
(45°F)		10°C
(51°F)		19°C
(66°F)		24°C
(75°F)		29°C
(84°F)		29°C
(85°F)		33°C
(92°F)		36°C
(97°F)		32°C
(89°F)		28°C
(82°F)		21°C
(70°F)		14°C
(57°F)
Average high3°C
(38°F)		4°C
(40°F)		10°C
(50°F)		15°C
(60°F)		22°C
(71°F)		24°C
(76°F)		28°C
(83°F)		30°C
(86°F)		25°C
(78°F)		19°C
(67°F)		13°C
(56°F)		6°C
(43°F)
Daily mean1°C
(33°F)		1°C
(34°F)		5°C
(42°F)		10°C
(51°F)		17°C
(62°F)		20°C
(68°F)		25°C
(77°F)		26°C
(79°F)		21°C
(71°F)		15°C
(60°F)		9°C
(49°F)		3°C
(38°F)
Average low-2°C
(28°F)		-2°C
(29°F)		1°C
(34°F)		5°C
(42°F)		12°C
(53°F)		16°C
(61°F)		22°C
(71°F)		23°C
(73°F)		18°C
(64°F)		12°C
(53°F)		5°C
(42°F)		-0°C
(32°F)
Mean minimum-7°C
(19°F)		-7°C
(21°F)		-5°C
(23°F)		-1°C
(31°F)		5°C
(42°F)		11°C
(53°F)		18°C
(65°F)		17°C
(64°F)		11°C
(52°F)		6°C
(43°F)		-1°C
(30°F)		-6°C
(22°F)
Minimum-11°C
(13°F)		-9°C
(17°F)		-8°C
(18°F)		-2°C
(28°F)		5°C
(41°F)		9°C
(48°F)		18°C
(64°F)		15°C
(59°F)		10°C
(50°F)		5°C
(41°F)		-3°C
(26°F)		-7°C
(19°F)

Compare climate in Agano with other places

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

Monthly average precipitation in Agano, Japan

Agano usually has the most precipitation in July, August and December, with an average of 22 rainy days and 286 mm (11.3 inches) of precipitation per month. The driest months in Agano are April, May and November. On average, 156 mm (6.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Agano. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)184 (7.2)169 (6.6)163 (6.4)152 (6.0)154 (6.1)169 (6.6)353 (13.9)280 (11.0)180 (7.1)186 (7.3)161 (6.3)224 (8.8)
Average precipitation days (≥ 1 mm)222320171515212018161826

Monthly sunshine hours in Agano, Japan

The sunniest months in Agano are May, June and August, when the sun shines an average of 9 hours 37 minutes a day. Least sunny months in Agano: January, February 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 Agano. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours143195248274302288275295250215208175
Mean daily daylight hours9h 51m10h 46m11h 57m13h 10m14h 12m14h 43m14h 27m13h 33m12h 24m11h 11m10h 7m9h 34m

Solar UV radiation in Agano, Japan

Agano experiences the highest level of ultraviolet (UV) radiation in June, July and August, 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 Agano UV Index data.

Average daily maximum UV levels by month for Agano. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3579101111119653