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Monthly climate in Koriyama, Fukushima, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Koriyama features a humid subtropical climate (Cfa).Temperatures typically range between 0 °C (32 °F) and 25 °C (77 °F) through the year, but rarely can drop to -12 °C (10 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1284 mm (50.6 inches) and receives 154 rainy days on the 1 mm (0.04 inches) threshold annually.Koriyama enjoys an average of 2876 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Koriyama, Fukushima, Japan §

The warmest months in Koriyama are July, August and September, with daily mean temperatures ranging from 20 to 25 °C (68 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 2 °C (32 - 37 °F) throughout the day. On average each year, Koriyama experiences 63 days above 25 °C (77.0 °F) and 89 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koriyama, Fukushima, 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 10°C
(51°F)		 17°C
(62°F)		 21°C
(70°F)		 27°C
(81°F)		 32°C
(90°F)		 33°C
(91°F)		 35°C
(95°F)		 35°C
(95°F)		 32°C
(90°F)		 28°C
(82°F)		 20°C
(68°F)		 18°C
(64°F)
Mean maximum 8°C
(47°F)		 12°C
(55°F)		 18°C
(65°F)		 23°C
(73°F)		 29°C
(84°F)		 28°C
(83°F)		 33°C
(91°F)		 34°C
(93°F)		 30°C
(85°F)		 26°C
(78°F)		 19°C
(66°F)		 13°C
(55°F)
Average high 3°C
(38°F)		 5°C
(41°F)		 10°C
(50°F)		 15°C
(59°F)		 21°C
(70°F)		 24°C
(75°F)		 27°C
(81°F)		 29°C
(84°F)		 24°C
(75°F)		 18°C
(65°F)		 13°C
(55°F)		 6°C
(43°F)
Daily mean 0°C
(32°F)		 1°C
(34°F)		 5°C
(42°F)		 10°C
(50°F)		 16°C
(61°F)		 19°C
(67°F)		 23°C
(74°F)		 25°C
(77°F)		 20°C
(68°F)		 14°C
(58°F)		 8°C
(47°F)		 2°C
(37°F)
Average low -3°C
(27°F)		 -2°C
(29°F)		 1°C
(34°F)		 5°C
(41°F)		 11°C
(52°F)		 15°C
(60°F)		 20°C
(69°F)		 21°C
(71°F)		 17°C
(62°F)		 11°C
(52°F)		 4°C
(40°F)		 -1°C
(31°F)
Mean minimum -8°C
(18°F)		 -6°C
(21°F)		 -4°C
(25°F)		 -1°C
(30°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(61°F)		 16°C
(62°F)		 11°C
(52°F)		 4°C
(40°F)		 -2°C
(29°F)		 -5°C
(23°F)
Minimum -12°C
(10°F)		 -9°C
(16°F)		 -6°C
(22°F)		 -3°C
(28°F)		 4°C
(39°F)		 8°C
(47°F)		 15°C
(58°F)		 13°C
(56°F)		 8°C
(47°F)		 2°C
(36°F)		 -3°C
(27°F)		 -7°C
(20°F)

Compare climate in Koriyama with other places

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

Monthly average precipitation in Koriyama, Fukushima, Japan §

Koriyama usually has the most precipitation in July, September and October, with an average of 15 rainy days and 184 mm (7.3 inches) of precipitation per month.The driest months in Koriyama are January, February and November. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koriyama, Fukushima, 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) 53 (2.1) 44 (1.7) 110 (4.3) 99 (3.9) 102 (4.0) 100 (3.9) 225 (8.8) 123 (4.8) 139 (5.5) 190 (7.5) 38 (1.5) 62 (2.4)
Average precipitation days (≥ 1 mm) 11 10 11 13 12 13 20 18 14 12 7 13

Monthly sunshine hours in Koriyama, Fukushima, Japan §

The sunniest months in Koriyama are May, June and August, when the sun shines an average of 9 hours 10 minutes a day.Least sunny months in Koriyama: January, October and December receive an average of 6 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koriyama, Fukushima, 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 166 217 258 271 288 275 251 279 237 204 221 203
Mean daily daylight hours 9h 53m 10h 47m 11h 57m 13h 9m 14h 10m 14h 41m 14h 25m 13h 32m 12h 23m 11h 12m 10h 9m 9h 37m

Solar UV radiation in Koriyama, Fukushima, Japan §

Koriyama experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 11, 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 Koriyama UV Index data.

Average daily maximum UV levels by month for Koriyama, Fukushima, 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 7 9 10 11 11 11 9 6 5 3