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Monthly climate in Koshimizu, Hokkaido, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Koshimizu features a humid continental climate (Dfb).Temperatures typically range between -8 °C (19 °F) and 18 °C (65 °F) through the year, but rarely can drop to -25 °C (-12 °F) or can rise to as high as 33 °C (92 °F).The average annual precipitation amounts to about 1088 mm (42.8 inches) and receives 146 rainy days on the 1 mm (0.04 inches) threshold annually.Koshimizu enjoys an average of 2974 hours of sunshine throughout the year, and daylight varies from 8 hours 57 minutes to 15 hours 23 minutes per day.

Monthly average temperatures in Koshimizu, Hokkaido, Japan §

The warmest months in Koshimizu are July, August and September, with daily mean temperatures ranging from 16 to 18 °C (61 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -8 to -3 °C (19 - 27 °F) throughout the day. On average each year, Koshimizu experiences 12 days above 25 °C (77.0 °F) and 139 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koshimizu, Hokkaido, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 6°C
(43°F)		 6°C
(42°F)		 13°C
(55°F)		 23°C
(73°F)		 33°C
(92°F)		 26°C
(80°F)		 32°C
(89°F)		 30°C
(86°F)		 29°C
(84°F)		 21°C
(70°F)		 17°C
(62°F)		 12°C
(54°F)
Mean maximum 3°C
(38°F)		 3°C
(38°F)		 9°C
(49°F)		 19°C
(66°F)		 25°C
(78°F)		 22°C
(73°F)		 28°C
(83°F)		 28°C
(83°F)		 26°C
(78°F)		 20°C
(69°F)		 15°C
(59°F)		 8°C
(47°F)
Average high -4°C
(25°F)		 -4°C
(25°F)		 1°C
(35°F)		 8°C
(46°F)		 14°C
(57°F)		 17°C
(62°F)		 21°C
(70°F)		 21°C
(70°F)		 19°C
(67°F)		 14°C
(57°F)		 7°C
(45°F)		 -0°C
(32°F)
Daily mean -7°C
(19°F)		 -8°C
(19°F)		 -2°C
(29°F)		 4°C
(39°F)		 10°C
(50°F)		 13°C
(56°F)		 18°C
(64°F)		 18°C
(65°F)		 16°C
(61°F)		 11°C
(51°F)		 4°C
(40°F)		 -3°C
(27°F)
Average low -11°C
(12°F)		 -11°C
(12°F)		 -6°C
(22°F)		 -0°C
(32°F)		 6°C
(43°F)		 10°C
(50°F)		 15°C
(59°F)		 16°C
(61°F)		 13°C
(56°F)		 8°C
(46°F)		 1°C
(34°F)		 -6°C
(21°F)
Mean minimum -18°C
(-1°F)		 -18°C
(-1°F)		 -13°C
(8°F)		 -6°C
(21°F)		 1°C
(34°F)		 5°C
(42°F)		 10°C
(51°F)		 12°C
(53°F)		 8°C
(46°F)		 3°C
(37°F)		 -6°C
(22°F)		 -13°C
(8°F)
Minimum -20°C
(-4°F)		 -25°C
(-12°F)		 -15°C
(4°F)		 -10°C
(15°F)		 0°C
(33°F)		 3°C
(37°F)		 7°C
(45°F)		 10°C
(51°F)		 5°C
(42°F)		 1°C
(34°F)		 -9°C
(16°F)		 -14°C
(6°F)

Compare climate in Koshimizu with other places

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

Monthly average precipitation in Koshimizu, Hokkaido, Japan §

Koshimizu usually has the most precipitation in August, October and November, with an average of 14 rainy days and 128 mm (5.0 inches) of precipitation per month.The driest months in Koshimizu are January, February and December. On average, 60 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koshimizu, Hokkaido, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 54 (2.1) 55 (2.2) 88 (3.5) 72 (2.8) 95 (3.7) 96 (3.8) 79 (3.1) 129 (5.1) 95 (3.7) 159 (6.2) 96 (3.8) 70 (2.8)
Average precipitation days (≥ 1 mm) 12 11 11 12 13 12 8 13 12 14 15 13

Monthly sunshine hours in Koshimizu, Hokkaido, Japan §

The sunniest months in Koshimizu are May, June and July, when the sun shines an average of 9 hours 42 minutes a day.Least sunny months in Koshimizu: January, November and December receive an average of 6 hours 15 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koshimizu, Hokkaido, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 165 214 255 282 299 291 301 264 256 231 200 209
Mean daily daylight hours 9h 18m 10h 27m 11h 56m 13h 26m 14h 43m 15h 23m 15h 3m 13h 55m 12h 28m 10h 58m 9h 39m 8h 57m

Solar UV radiation in Koshimizu, Hokkaido, Japan §

Koshimizu experiences the highest level of ultraviolet (UV) radiation in June, 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 Koshimizu UV Index data.

Average daily maximum UV levels by month for Koshimizu, Hokkaido, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 3 6 7 8 9 10 9 8 5 3 2