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Monthly climate in Sanjo, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sanjo features a humid subtropical climate (Cfa). Temperatures typically range between 1 °C (34 °F) and 26 °C (80 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 2145 mm (84.4 inches) and receives 223 rainy days on the 1 mm (0.04 inches) threshold annually. Sanjo enjoys an average of 2892 hours of sunshine throughout the year, and daylight varies from 9 hours 36 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Sanjo, Japan

The warmest months in Sanjo are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (71 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (34 - 38 °F) throughout the day. On average each year, Sanjo experiences 90 days above 25 °C (77.0 °F) and 77 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sanjo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(53°F)		17°C
(63°F)		22°C
(71°F)		27°C
(81°F)		33°C
(91°F)		33°C
(92°F)		38°C
(101°F)		38°C
(101°F)		37°C
(99°F)		32°C
(90°F)		25°C
(77°F)		20°C
(69°F)
Mean maximum9°C
(48°F)		12°C
(54°F)		19°C
(67°F)		25°C
(77°F)		30°C
(86°F)		30°C
(86°F)		34°C
(94°F)		37°C
(98°F)		33°C
(91°F)		29°C
(84°F)		22°C
(72°F)		15°C
(59°F)
Average high4°C
(39°F)		5°C
(41°F)		11°C
(52°F)		16°C
(61°F)		23°C
(73°F)		25°C
(78°F)		29°C
(85°F)		31°C
(88°F)		26°C
(79°F)		20°C
(68°F)		14°C
(57°F)		7°C
(45°F)
Daily mean1°C
(34°F)		1°C
(35°F)		6°C
(43°F)		11°C
(51°F)		17°C
(63°F)		21°C
(69°F)		25°C
(77°F)		26°C
(80°F)		22°C
(71°F)		16°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
(41°F)		-0°C
(32°F)
Mean minimum-8°C
(19°F)		-7°C
(19°F)		-6°C
(22°F)		-1°C
(30°F)		5°C
(42°F)		11°C
(52°F)		19°C
(66°F)		18°C
(64°F)		11°C
(53°F)		6°C
(42°F)		-2°C
(29°F)		-6°C
(21°F)
Minimum-12°C
(11°F)		-9°C
(16°F)		-9°C
(17°F)		-4°C
(26°F)		5°C
(41°F)		9°C
(48°F)		18°C
(65°F)		14°C
(58°F)		10°C
(50°F)		5°C
(41°F)		-4°C
(25°F)		-8°C
(18°F)

Compare climate in Sanjo with other places

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

Monthly average precipitation in Sanjo, Japan

Sanjo usually has the most precipitation in July, August and December, with an average of 21 rainy days and 248 mm (9.8 inches) of precipitation per month. The driest months in Sanjo are April, May and June. On average, 137 mm (5.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sanjo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)183 (7.2)166 (6.5)157 (6.2)138 (5.4)133 (5.3)140 (5.5)326 (12.8)205 (8.1)159 (6.3)178 (7.0)148 (5.8)212 (8.4)
Average precipitation days (≥ 1 mm)222220161514201817161825

Monthly sunshine hours in Sanjo, Japan

The sunniest months in Sanjo are May, June and August, when the sun shines an average of 9 hours 43 minutes a day. Least sunny months in Sanjo: January, February and December receive an average of 5 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sanjo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours142195245274303291280299253219208178
Mean daily daylight hours9h 52m10h 47m11h 57m13h 9m14h 10m14h 41m14h 25m13h 32m12h 23m11h 11m10h 9m9h 36m

Solar UV radiation in Sanjo, Japan

Sanjo experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / 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 4. For more detailed information, check out our hourly Sanjo UV Index data.

Average daily maximum UV levels by month for Sanjo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3479101011119643