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Monthly climate in Katsuura, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Katsuura features a humid subtropical climate (Cfa). Temperatures typically range between 7 °C (46 °F) and 28 °C (82 °F) through the year, but rarely can drop to 0 °C (31 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 1724 mm (67.9 inches) and receives 150 rainy days on the 1 mm (0.04 inches) threshold annually. Katsuura enjoys an average of 2952 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 Katsuura, Japan

The warmest months in Katsuura are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (76 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 10 °C (46 - 51 °F) throughout the day. On average each year, Katsuura experiences 79 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 Katsuura. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(65°F)		19°C
(66°F)		21°C
(69°F)		23°C
(74°F)		28°C
(82°F)		29°C
(85°F)		34°C
(93°F)		34°C
(94°F)		33°C
(91°F)		28°C
(83°F)		23°C
(74°F)		22°C
(71°F)
Mean maximum16°C
(60°F)		16°C
(62°F)		19°C
(66°F)		22°C
(72°F)		26°C
(79°F)		27°C
(81°F)		31°C
(88°F)		33°C
(92°F)		30°C
(87°F)		27°C
(81°F)		22°C
(72°F)		18°C
(65°F)
Average high10°C
(50°F)		11°C
(51°F)		14°C
(57°F)		17°C
(63°F)		22°C
(71°F)		24°C
(76°F)		28°C
(82°F)		30°C
(86°F)		26°C
(80°F)		22°C
(72°F)		18°C
(64°F)		13°C
(55°F)
Daily mean7°C
(46°F)		8°C
(47°F)		11°C
(53°F)		15°C
(59°F)		19°C
(67°F)		22°C
(72°F)		26°C
(78°F)		28°C
(82°F)		24°C
(76°F)		20°C
(68°F)		15°C
(60°F)		10°C
(51°F)
Average low5°C
(40°F)		5°C
(41°F)		8°C
(47°F)		12°C
(54°F)		17°C
(63°F)		20°C
(69°F)		24°C
(75°F)		26°C
(78°F)		22°C
(72°F)		18°C
(64°F)		13°C
(56°F)		8°C
(46°F)
Mean minimum1°C
(34°F)		1°C
(34°F)		3°C
(38°F)		6°C
(43°F)		12°C
(54°F)		17°C
(63°F)		21°C
(70°F)		22°C
(72°F)		18°C
(65°F)		13°C
(56°F)		8°C
(46°F)		3°C
(37°F)
Minimum-0°C
(31°F)		0°C
(33°F)		2°C
(37°F)		4°C
(40°F)		11°C
(52°F)		16°C
(61°F)		19°C
(67°F)		21°C
(70°F)		16°C
(62°F)		12°C
(54°F)		5°C
(42°F)		1°C
(33°F)

Compare climate in Katsuura with other places

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

Monthly average precipitation in Katsuura, Japan

Katsuura usually has the most precipitation in July, September and October, with an average of 16 rainy days and 226 mm (8.9 inches) of precipitation per month. The driest months in Katsuura are January, February and December. On average, 70 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Katsuura. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.6)57 (2.3)163 (6.4)112 (4.4)135 (5.3)185 (7.3)207 (8.2)121 (4.7)196 (7.7)274 (10.8)122 (4.8)87 (3.4)
Average precipitation days (≥ 1 mm)691410121517151715119

Monthly sunshine hours in Katsuura, Japan

The sunniest months in Katsuura are May, July and August, when the sun shines an average of 9 hours 21 minutes a day. Least sunny months in Katsuura: January, October and December receive an average of 6 hours 34 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Katsuura. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours184218251271289267271309244211218216
Mean daily daylight hours10h 3m10h 53m11h 58m13h 4m14h 0m14h 28m14h 14m13h 25m12h 22m11h 16m10h 18m9h 48m

Solar UV radiation in Katsuura, Japan

Katsuura experiences the highest level of ultraviolet (UV) radiation in May, 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 Katsuura UV Index data.

Average daily maximum UV levels by month for Katsuura. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)458101111111110754