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Monthly climate in Koshigaya, Saitama, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Koshigaya features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 28 °C (83 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 38 °C (102 °F).The average annual precipitation amounts to about 1418 mm (55.8 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually.Koshigaya enjoys an average of 2941 hours of sunshine throughout the year, and daylight varies from 9 hours 44 minutes to 14 hours 33 minutes per day.

Monthly average temperatures in Koshigaya, Saitama, Japan §

The warmest months in Koshigaya are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (75 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 44 °F) throughout the day. On average each year, Koshigaya experiences 107 days above 25 °C (77.0 °F) and 35 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koshigaya, Saitama, 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 18°C
(65°F)		 21°C
(71°F)		 25°C
(77°F)		 29°C
(85°F)		 33°C
(92°F)		 34°C
(93°F)		 38°C
(102°F)		 38°C
(100°F)		 36°C
(97°F)		 32°C
(90°F)		 24°C
(76°F)		 21°C
(70°F)
Mean maximum 16°C
(61°F)		 18°C
(65°F)		 23°C
(73°F)		 27°C
(80°F)		 31°C
(87°F)		 31°C
(88°F)		 35°C
(96°F)		 37°C
(98°F)		 34°C
(94°F)		 29°C
(85°F)		 23°C
(73°F)		 19°C
(66°F)
Average high 10°C
(50°F)		 11°C
(52°F)		 15°C
(60°F)		 19°C
(67°F)		 24°C
(76°F)		 27°C
(80°F)		 30°C
(86°F)		 32°C
(90°F)		 27°C
(81°F)		 22°C
(72°F)		 18°C
(64°F)		 12°C
(54°F)
Daily mean 4°C
(40°F)		 6°C
(43°F)		 10°C
(51°F)		 14°C
(58°F)		 20°C
(68°F)		 23°C
(73°F)		 26°C
(80°F)		 28°C
(83°F)		 24°C
(75°F)		 18°C
(65°F)		 13°C
(55°F)		 7°C
(44°F)
Average low -0°C
(32°F)		 1°C
(34°F)		 5°C
(41°F)		 10°C
(50°F)		 15°C
(60°F)		 19°C
(67°F)		 23°C
(74°F)		 25°C
(77°F)		 21°C
(70°F)		 15°C
(59°F)		 8°C
(47°F)		 2°C
(37°F)
Mean minimum -5°C
(24°F)		 -4°C
(25°F)		 -1°C
(30°F)		 3°C
(38°F)		 7°C
(46°F)		 16°C
(60°F)		 19°C
(67°F)		 20°C
(68°F)		 15°C
(60°F)		 8°C
(47°F)		 2°C
(35°F)		 -3°C
(28°F)
Minimum -7°C
(20°F)		 -5°C
(23°F)		 -4°C
(26°F)		 1°C
(34°F)		 5°C
(42°F)		 13°C
(56°F)		 17°C
(63°F)		 17°C
(63°F)		 13°C
(55°F)		 6°C
(43°F)		 -1°C
(30°F)		 -4°C
(24°F)

Compare climate in Koshigaya with other places

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

Monthly average precipitation in Koshigaya, Saitama, Japan §

Koshigaya usually has the most precipitation in July, September and October, with an average of 16 rainy days and 213 mm (8.4 inches) of precipitation per month.The driest months in Koshigaya are January, February and December. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koshigaya, Saitama, 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) 39 (1.5) 38 (1.5) 122 (4.8) 111 (4.4) 111 (4.4) 134 (5.3) 225 (8.8) 112 (4.4) 167 (6.6) 249 (9.8) 63 (2.5) 47 (1.8)
Average precipitation days (≥ 1 mm) 4 6 11 10 11 15 18 13 17 15 8 5

Monthly sunshine hours in Koshigaya, Saitama, Japan §

The sunniest months in Koshigaya are April, May and August, when the sun shines an average of 9 hours 8 minutes a day.Least sunny months in Koshigaya: January, July and October receive an average of 6 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koshigaya, Saitama, 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 193 239 263 277 283 262 232 280 233 205 234 233
Mean daily daylight hours 10h 0m 10h 51m 11h 57m 13h 6m 14h 4m 14h 33m 14h 18m 13h 28m 12h 22m 11h 14m 10h 15m 9h 44m

Solar UV radiation in Koshigaya, Saitama, Japan §

Koshigaya 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 5. For more detailed information, check out our hourly Koshigaya UV Index data.

Average daily maximum UV levels by month for Koshigaya, Saitama, 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) 3 5 8 9 10 10 11 10 9 7 5 3