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Monthly climate in Biei, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Biei features a humid continental climate (Dfb). Temperatures typically range between -9 °C (16 °F) and 20 °C (68 °F) through the year, but rarely can drop to -23 °C (-10 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1439 mm (56.7 inches) and receives 206 rainy days on the 1 mm (0.04 inches) threshold annually. Biei enjoys an average of 2881 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 21 minutes per day.

Monthly average temperatures in Biei, Japan

The warmest months in Biei are July, August and September, with daily mean temperatures ranging from 15 to 20 °C (60 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 21 °F) throughout the day. On average each year, Biei experiences 14 days above 25 °C (77.0 °F) and 151 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Biei. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum3°C
(38°F)		7°C
(45°F)		12°C
(54°F)		20°C
(69°F)		31°C
(88°F)		27°C
(80°F)		30°C
(86°F)		31°C
(88°F)		28°C
(83°F)		23°C
(73°F)		15°C
(59°F)		12°C
(53°F)
Mean maximum1°C
(34°F)		3°C
(38°F)		8°C
(48°F)		18°C
(64°F)		25°C
(77°F)		23°C
(73°F)		28°C
(83°F)		29°C
(84°F)		25°C
(78°F)		20°C
(67°F)		13°C
(56°F)		6°C
(43°F)
Average high-5°C
(23°F)		-4°C
(25°F)		2°C
(36°F)		8°C
(48°F)		16°C
(60°F)		18°C
(65°F)		23°C
(74°F)		23°C
(73°F)		19°C
(67°F)		13°C
(56°F)		5°C
(41°F)		-3°C
(27°F)
Daily mean-9°C
(16°F)		-7°C
(19°F)		-1°C
(30°F)		4°C
(40°F)		11°C
(53°F)		15°C
(59°F)		20°C
(68°F)		19°C
(67°F)		15°C
(60°F)		9°C
(48°F)		2°C
(35°F)		-6°C
(21°F)
Average low-13°C
(10°F)		-11°C
(13°F)		-5°C
(23°F)		-0°C
(32°F)		7°C
(45°F)		11°C
(52°F)		16°C
(62°F)		16°C
(61°F)		11°C
(52°F)		5°C
(41°F)		-2°C
(28°F)		-10°C
(15°F)
Mean minimum-20°C
(-4°F)		-18°C
(0°F)		-13°C
(9°F)		-7°C
(20°F)		1°C
(34°F)		5°C
(42°F)		12°C
(55°F)		9°C
(49°F)		4°C
(39°F)		-2°C
(28°F)		-11°C
(13°F)		-18°C
(-1°F)
Minimum-23°C
(-10°F)		-21°C
(-5°F)		-15°C
(5°F)		-9°C
(16°F)		0°C
(32°F)		3°C
(38°F)		9°C
(48°F)		8°C
(46°F)		1°C
(35°F)		-4°C
(25°F)		-14°C
(7°F)		-22°C
(-7°F)

Compare climate in Biei with other places

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

Monthly average precipitation in Biei, Japan

Biei usually has the most precipitation in August, October and November, with an average of 18 rainy days and 165 mm (6.5 inches) of precipitation per month. The driest months in Biei are January, February and April. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Biei. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)94 (3.7)102 (4.0)84 (3.3)114 (4.5)115 (4.5)123 (4.8)181 (7.1)111 (4.4)154 (6.0)160 (6.3)132 (5.2)
Average precipitation days (≥ 1 mm)182115141514131614162327

Monthly sunshine hours in Biei, Japan

The sunniest months in Biei are May, June and July, when the sun shines an average of 9 hours 36 minutes a day. Least sunny months in Biei: January, November and December receive an average of 5 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Biei. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours148194246277295284304275259229182182
Mean daily daylight hours9h 19m10h 28m11h 56m13h 25m14h 42m15h 21m15h 1m13h 54m12h 28m10h 59m9h 40m8h 59m

Solar UV radiation in Biei, Japan

Biei experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Biei UV Index data.

Average daily maximum UV levels by month for Biei. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)23679910108532