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Monthly climate in Anan, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Anan features a humid subtropical climate (Cfa). Temperatures typically range between 9 °C (48 °F) and 27 °C (81 °F) through the year, but rarely can drop to 1 °C (35 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 1875 mm (73.8 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually. Anan enjoys an average of 3122 hours of sunshine throughout the year, and daylight varies from 9 hours 55 minutes to 14 hours 21 minutes per day.

Monthly average temperatures in Anan, Japan

The warmest months in Anan are July, August and September, with daily mean temperatures ranging from 25 to 27 °C (77 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 9 to 11 °C (48 - 53 °F) throughout the day. On average each year, Anan experiences 70 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 Anan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(64°F)		17°C
(63°F)		18°C
(64°F)		21°C
(69°F)		23°C
(73°F)		26°C
(78°F)		29°C
(85°F)		30°C
(86°F)		29°C
(85°F)		27°C
(80°F)		23°C
(73°F)		21°C
(70°F)
Mean maximum16°C
(60°F)		15°C
(60°F)		17°C
(62°F)		19°C
(66°F)		22°C
(72°F)		24°C
(76°F)		28°C
(83°F)		30°C
(86°F)		29°C
(84°F)		26°C
(78°F)		22°C
(72°F)		19°C
(66°F)
Average high10°C
(51°F)		10°C
(51°F)		13°C
(56°F)		16°C
(61°F)		19°C
(67°F)		22°C
(73°F)		26°C
(79°F)		28°C
(83°F)		26°C
(79°F)		22°C
(72°F)		18°C
(64°F)		13°C
(56°F)
Daily mean9°C
(48°F)		9°C
(48°F)		11°C
(53°F)		14°C
(58°F)		18°C
(65°F)		22°C
(71°F)		25°C
(78°F)		27°C
(81°F)		25°C
(77°F)		21°C
(70°F)		16°C
(62°F)		11°C
(53°F)
Average low7°C
(45°F)		7°C
(45°F)		10°C
(50°F)		13°C
(55°F)		17°C
(64°F)		21°C
(70°F)		25°C
(77°F)		27°C
(80°F)		24°C
(76°F)		20°C
(68°F)		15°C
(59°F)		10°C
(50°F)
Mean minimum3°C
(38°F)		3°C
(38°F)		6°C
(43°F)		8°C
(47°F)		13°C
(56°F)		18°C
(65°F)		23°C
(74°F)		24°C
(76°F)		21°C
(70°F)		16°C
(61°F)		10°C
(51°F)		5°C
(42°F)
Minimum1°C
(35°F)		2°C
(35°F)		5°C
(41°F)		7°C
(45°F)		12°C
(54°F)		17°C
(63°F)		22°C
(71°F)		23°C
(74°F)		20°C
(68°F)		15°C
(59°F)		10°C
(49°F)		4°C
(39°F)

Compare climate in Anan with other places

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

Monthly average precipitation in Anan, Japan

Anan usually has the most precipitation in July, September and October, with an average of 14 rainy days and 282 mm (11.1 inches) of precipitation per month. The driest months in Anan are January, November and December. On average, 64 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Anan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)59 (2.3)68 (2.7)128 (5.0)128 (5.0)174 (6.9)200 (7.9)275 (10.8)140 (5.5)233 (9.2)337 (13.3)64 (2.5)68 (2.7)
Average precipitation days (≥ 1 mm)6710810121611151277

Monthly sunshine hours in Anan, Japan

The sunniest months in Anan are May, July and August, when the sun shines an average of 9 hours 44 minutes a day. Least sunny months in Anan: January, February and December receive an average of 7 hours 0 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Anan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours185228269283296278288321259246240223
Mean daily daylight hours10h 9m10h 57m11h 58m13h 1m13h 54m14h 21m14h 8m13h 21m12h 21m11h 18m10h 23m9h 55m

Solar UV radiation in Anan, Japan

Anan 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 Anan UV Index data.

Average daily maximum UV levels by month for Anan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468111111121110764