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Monthly climate in Ishikari, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ishikari features a humid continental climate (Dfb). Temperatures typically range between -3 °C (26 °F) and 22 °C (71 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 1297 mm (51.1 inches) and receives 189 rainy days on the 1 mm (0.04 inches) threshold annually. Ishikari enjoys an average of 2914 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in Ishikari, Japan

The warmest months in Ishikari are July, August and September, with daily mean temperatures ranging from 19 to 22 °C (66 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -1 °C (26 - 31 °F) throughout the day. On average each year, Ishikari experiences 15 days above 25 °C (77.0 °F) and 107 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ishikari. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum6°C
(42°F)		5°C
(42°F)		14°C
(57°F)		20°C
(68°F)		27°C
(81°F)		24°C
(76°F)		30°C
(86°F)		30°C
(86°F)		28°C
(83°F)		24°C
(75°F)		17°C
(63°F)		13°C
(56°F)
Mean maximum4°C
(39°F)		5°C
(40°F)		10°C
(50°F)		17°C
(62°F)		22°C
(72°F)		22°C
(71°F)		28°C
(82°F)		28°C
(84°F)		26°C
(79°F)		22°C
(71°F)		16°C
(61°F)		9°C
(49°F)
Average high-1°C
(30°F)		-1°C
(31°F)		4°C
(39°F)		9°C
(49°F)		15°C
(60°F)		18°C
(65°F)		23°C
(74°F)		24°C
(75°F)		21°C
(71°F)		16°C
(61°F)		9°C
(48°F)		1°C
(34°F)
Daily mean-3°C
(26°F)		-3°C
(27°F)		1°C
(35°F)		6°C
(43°F)		12°C
(54°F)		16°C
(61°F)		21°C
(69°F)		22°C
(71°F)		19°C
(66°F)		13°C
(56°F)		6°C
(44°F)		-1°C
(31°F)
Average low-6°C
(22°F)		-5°C
(23°F)		-1°C
(30°F)		3°C
(37°F)		9°C
(49°F)		13°C
(56°F)		18°C
(65°F)		20°C
(68°F)		16°C
(62°F)		11°C
(51°F)		4°C
(40°F)		-2°C
(28°F)
Mean minimum-11°C
(13°F)		-10°C
(14°F)		-7°C
(20°F)		-1°C
(30°F)		5°C
(42°F)		10°C
(50°F)		15°C
(58°F)		15°C
(60°F)		12°C
(53°F)		6°C
(43°F)		-1°C
(30°F)		-8°C
(19°F)
Minimum-13°C
(8°F)		-12°C
(11°F)		-8°C
(18°F)		-2°C
(28°F)		4°C
(40°F)		8°C
(47°F)		11°C
(52°F)		15°C
(59°F)		10°C
(49°F)		4°C
(40°F)		-3°C
(26°F)		-11°C
(13°F)

Compare climate in Ishikari with other places

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

Monthly average precipitation in Ishikari, Japan

Ishikari usually has the most precipitation in August, October and November, with an average of 17 rainy days and 155 mm (6.1 inches) of precipitation per month. The driest months in Ishikari are January, March and April. On average, 76 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ishikari. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)74 (2.9)84 (3.3)80 (3.2)73 (2.9)89 (3.5)103 (4.1)104 (4.1)182 (7.2)103 (4.0)129 (5.1)153 (6.0)123 (4.8)
Average precipitation days (≥ 1 mm)192114111210111313162227

Monthly sunshine hours in Ishikari, Japan

The sunniest months in Ishikari are May, June and July, when the sun shines an average of 10 hours 4 minutes a day. Least sunny months in Ishikari: January, November and December receive an average of 5 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ishikari. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours133189242286309296321292269233176163
Mean daily daylight hours9h 22m10h 29m11h 56m13h 24m14h 40m15h 18m14h 59m13h 53m12h 28m11h 0m9h 42m9h 1m

Solar UV radiation in Ishikari, Japan

Ishikari 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 Ishikari UV Index data.

Average daily maximum UV levels by month for Ishikari. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2367999108532