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Monthly climate in Koga, Fukuoka, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Koga features a humid subtropical climate (Cfa).Temperatures typically range between 7 °C (45 °F) and 29 °C (84 °F) through the year, but rarely can drop to -2 °C (28 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 1672 mm (65.8 inches) and receives 134 rainy days on the 1 mm (0.04 inches) threshold annually.Koga enjoys an average of 3073 hours of sunshine throughout the year, and daylight varies from 9 hours 56 minutes to 14 hours 20 minutes per day.

Monthly average temperatures in Koga, Fukuoka, Japan §

The warmest months in Koga are July, August and September, with daily mean temperatures ranging from 25 to 29 °C (77 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (45 - 48 °F) throughout the day. On average each year, Koga experiences 115 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koga, Fukuoka, 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 17°C
(64°F)		 22°C
(72°F)		 23°C
(74°F)		 28°C
(83°F)		 32°C
(89°F)		 34°C
(93°F)		 37°C
(99°F)		 38°C
(101°F)		 35°C
(96°F)		 32°C
(90°F)		 26°C
(79°F)		 23°C
(74°F)
Mean maximum 15°C
(60°F)		 17°C
(64°F)		 21°C
(71°F)		 25°C
(78°F)		 29°C
(85°F)		 31°C
(87°F)		 34°C
(94°F)		 36°C
(98°F)		 33°C
(92°F)		 30°C
(86°F)		 24°C
(75°F)		 18°C
(65°F)
Average high 10°C
(51°F)		 11°C
(52°F)		 16°C
(60°F)		 20°C
(68°F)		 24°C
(76°F)		 27°C
(81°F)		 30°C
(87°F)		 32°C
(91°F)		 28°C
(83°F)		 24°C
(75°F)		 18°C
(65°F)		 12°C
(54°F)
Daily mean 7°C
(45°F)		 8°C
(46°F)		 12°C
(53°F)		 16°C
(60°F)		 20°C
(69°F)		 24°C
(75°F)		 27°C
(81°F)		 29°C
(84°F)		 25°C
(77°F)		 20°C
(68°F)		 14°C
(58°F)		 9°C
(48°F)
Average low 4°C
(40°F)		 4°C
(40°F)		 8°C
(47°F)		 12°C
(53°F)		 16°C
(62°F)		 20°C
(69°F)		 25°C
(77°F)		 26°C
(79°F)		 22°C
(72°F)		 17°C
(63°F)		 10°C
(51°F)		 6°C
(43°F)
Mean minimum -0°C
(32°F)		 -0°C
(32°F)		 2°C
(37°F)		 6°C
(42°F)		 10°C
(50°F)		 17°C
(62°F)		 21°C
(71°F)		 23°C
(73°F)		 17°C
(63°F)		 11°C
(52°F)		 4°C
(40°F)		 1°C
(35°F)
Minimum -2°C
(28°F)		 -2°C
(28°F)		 1°C
(34°F)		 5°C
(40°F)		 9°C
(48°F)		 16°C
(62°F)		 19°C
(66°F)		 20°C
(68°F)		 16°C
(61°F)		 10°C
(51°F)		 2°C
(36°F)		 1°C
(33°F)

Compare climate in Koga with other places

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

Monthly average precipitation in Koga, Fukuoka, Japan §

Koga usually has the most precipitation in July, August and September, with an average of 16 rainy days and 266 mm (10.5 inches) of precipitation per month.The driest months in Koga are January, November and December. On average, 55 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koga, Fukuoka, 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) 57 (2.2) 71 (2.8) 120 (4.7) 107 (4.2) 131 (5.1) 172 (6.8) 300 (11.8) 281 (11.1) 216 (8.5) 107 (4.2) 45 (1.8) 64 (2.5)
Average precipitation days (≥ 1 mm) 8 10 11 9 11 12 19 14 16 10 6 8

Monthly sunshine hours in Koga, Fukuoka, Japan §

The sunniest months in Koga are May, July and August, when the sun shines an average of 9 hours 26 minutes a day.Least sunny months in Koga: January, February and December receive an average of 6 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koga, Fukuoka, 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 178 232 262 280 292 279 280 304 256 253 236 215
Mean daily daylight hours 10h 10m 10h 57m 11h 58m 13h 1m 13h 54m 14h 20m 14h 7m 13h 21m 12h 21m 11h 18m 10h 24m 9h 56m

Solar UV radiation in Koga, Fukuoka, Japan §

Koga experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Koga UV Index data.

Average daily maximum UV levels by month for Koga, Fukuoka, 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) 4 6 8 11 11 11 12 12 11 7 6 4