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Monthly climate in Saijo, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Saijo features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (36 °F) and 26 °C (78 °F) through the year, but rarely can drop to -15 °C (5 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 1891 mm (74.5 inches) and receives 159 rainy days on the 1 mm (0.04 inches) threshold annually. Saijo enjoys an average of 2999 hours of sunshine throughout the year, and daylight varies from 9 hours 50 minutes to 14 hours 26 minutes per day.

Monthly average temperatures in Saijo, Japan

The warmest months in Saijo are July, August and September, with daily mean temperatures ranging from 21 to 26 °C (70 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 4 °C (36 - 40 °F) throughout the day. On average each year, Saijo experiences 75 days above 25 °C (77.0 °F) and 57 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Saijo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(54°F)		20°C
(68°F)		22°C
(71°F)		26°C
(79°F)		30°C
(85°F)		31°C
(87°F)		34°C
(94°F)		34°C
(94°F)		32°C
(90°F)		29°C
(85°F)		22°C
(72°F)		18°C
(65°F)
Mean maximum11°C
(52°F)		14°C
(57°F)		19°C
(67°F)		24°C
(76°F)		28°C
(82°F)		28°C
(83°F)		32°C
(90°F)		33°C
(92°F)		30°C
(87°F)		27°C
(81°F)		20°C
(68°F)		14°C
(57°F)
Average high6°C
(42°F)		7°C
(44°F)		12°C
(54°F)		17°C
(62°F)		22°C
(71°F)		24°C
(76°F)		28°C
(82°F)		30°C
(86°F)		25°C
(77°F)		20°C
(68°F)		14°C
(58°F)		8°C
(46°F)
Daily mean2°C
(36°F)		3°C
(37°F)		7°C
(45°F)		12°C
(53°F)		17°C
(63°F)		20°C
(68°F)		24°C
(76°F)		26°C
(78°F)		21°C
(70°F)		16°C
(60°F)		9°C
(49°F)		4°C
(40°F)
Average low-1°C
(30°F)		-1°C
(31°F)		3°C
(37°F)		7°C
(45°F)		12°C
(54°F)		16°C
(61°F)		21°C
(71°F)		22°C
(72°F)		18°C
(64°F)		12°C
(54°F)		5°C
(42°F)		1°C
(34°F)
Mean minimum-6°C
(21°F)		-8°C
(18°F)		-2°C
(28°F)		-1°C
(31°F)		5°C
(42°F)		11°C
(53°F)		18°C
(65°F)		18°C
(64°F)		12°C
(54°F)		5°C
(42°F)		-1°C
(31°F)		-3°C
(27°F)
Minimum-13°C
(10°F)		-15°C
(5°F)		-3°C
(28°F)		-3°C
(27°F)		3°C
(37°F)		8°C
(47°F)		17°C
(62°F)		15°C
(59°F)		11°C
(52°F)		5°C
(41°F)		-2°C
(29°F)		-4°C
(25°F)

Compare climate in Saijo with other places

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

Monthly average precipitation in Saijo, Japan

Saijo usually has the most precipitation in July, August and September, with an average of 16 rainy days and 285 mm (11.2 inches) of precipitation per month. The driest months in Saijo are January, February and November. On average, 67 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Saijo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)73 (2.9)85 (3.3)129 (5.1)131 (5.2)119 (4.7)197 (7.7)359 (14.1)262 (10.3)234 (9.2)171 (6.7)44 (1.7)89 (3.5)
Average precipitation days (≥ 1 mm)12131311111519161511716

Monthly sunshine hours in Saijo, Japan

The sunniest months in Saijo are May, June and August, when the sun shines an average of 9 hours 45 minutes a day. Least sunny months in Saijo: January, February and December receive an average of 6 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Saijo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours163211257279299294279303252243224191
Mean daily daylight hours10h 5m10h 54m11h 58m13h 3m13h 59m14h 26m14h 13m13h 24m12h 21m11h 16m10h 19m9h 50m

Solar UV radiation in Saijo, Japan

Saijo 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 exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Saijo UV Index data.

Average daily maximum UV levels by month for Saijo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)458111111121210753