nomadseason

Monthly climate in Ritto, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ritto features a humid subtropical climate (Cfa). Temperatures typically range between 4 °C (39 °F) and 28 °C (83 °F) through the year, but rarely can drop to -7 °C (19 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 1537 mm (60.5 inches) and receives 130 rainy days on the 1 mm (0.04 inches) threshold annually. Ritto enjoys an average of 2905 hours of sunshine throughout the year, and daylight varies from 9 hours 49 minutes to 14 hours 27 minutes per day.

Monthly average temperatures in Ritto, Japan

The warmest months in Ritto are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (75 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 44 °F) throughout the day. On average each year, Ritto experiences 109 days above 25 °C (77.0 °F) and 34 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ritto. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(60°F)		19°C
(67°F)		23°C
(73°F)		27°C
(80°F)		32°C
(89°F)		32°C
(90°F)		37°C
(98°F)		38°C
(101°F)		35°C
(96°F)		33°C
(92°F)		25°C
(77°F)		22°C
(72°F)
Mean maximum13°C
(56°F)		16°C
(60°F)		21°C
(70°F)		24°C
(76°F)		29°C
(85°F)		30°C
(87°F)		34°C
(94°F)		36°C
(98°F)		33°C
(91°F)		30°C
(86°F)		22°C
(72°F)		17°C
(62°F)
Average high8°C
(46°F)		9°C
(48°F)		14°C
(57°F)		18°C
(65°F)		24°C
(75°F)		27°C
(80°F)		30°C
(86°F)		32°C
(91°F)		28°C
(82°F)		22°C
(72°F)		17°C
(62°F)		11°C
(51°F)
Daily mean4°C
(39°F)		5°C
(41°F)		9°C
(49°F)		14°C
(57°F)		19°C
(66°F)		22°C
(72°F)		26°C
(80°F)		28°C
(83°F)		24°C
(75°F)		18°C
(65°F)		12°C
(54°F)		6°C
(44°F)
Average low0°C
(33°F)		1°C
(34°F)		4°C
(40°F)		9°C
(48°F)		14°C
(58°F)		18°C
(65°F)		23°C
(74°F)		25°C
(77°F)		21°C
(69°F)		15°C
(58°F)		8°C
(46°F)		3°C
(37°F)
Mean minimum-5°C
(24°F)		-4°C
(25°F)		-1°C
(30°F)		2°C
(35°F)		7°C
(46°F)		14°C
(57°F)		20°C
(69°F)		20°C
(68°F)		15°C
(59°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(27°F)
Minimum-7°C
(20°F)		-6°C
(21°F)		-3°C
(27°F)		-1°C
(31°F)		6°C
(43°F)		11°C
(52°F)		19°C
(66°F)		18°C
(65°F)		14°C
(57°F)		7°C
(45°F)		-1°C
(31°F)		-7°C
(19°F)

Compare climate in Ritto with other places

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

Monthly average precipitation in Ritto, Japan

Ritto usually has the most precipitation in July, August and October, with an average of 14 rainy days and 216 mm (8.5 inches) of precipitation per month. The driest months in Ritto are January, February and November. On average, 51 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ritto. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)52 (2.0)59 (2.3)116 (4.6)138 (5.4)144 (5.7)141 (5.6)253 (10.0)168 (6.6)136 (5.4)227 (8.9)41 (1.6)63 (2.5)
Average precipitation days (≥ 1 mm)88111011121912131358

Monthly sunshine hours in Ritto, Japan

The sunniest months in Ritto are April, May and August, when the sun shines an average of 9 hours 10 minutes a day. Least sunny months in Ritto: January, February and December receive an average of 6 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ritto. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours176212257270282263249291232230228211
Mean daily daylight hours10h 4m10h 54m11h 58m13h 4m13h 59m14h 27m14h 13m13h 25m12h 22m11h 16m10h 19m9h 49m

Solar UV radiation in Ritto, Japan

Ritto 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, 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 Ritto UV Index data.

Average daily maximum UV levels by month for Ritto. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468101111111110753