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Monthly climate in Karatsu, Saga, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Karatsu features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (46 °F) and 28 °C (83 °F) through the year, but rarely can drop to -1 °C (31 °F) or can rise to as high as 33 °C (92 °F).The average annual precipitation amounts to about 1794 mm (70.6 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually.Karatsu enjoys an average of 3073 hours of sunshine throughout the year, and daylight varies from 9 hours 57 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Karatsu, Saga, Japan §

The warmest months in Karatsu are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (77 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (46 - 50 °F) throughout the day. On average each year, Karatsu experiences 84 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Karatsu, Saga, 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
(64°F)		 19°C
(67°F)		 20°C
(68°F)		 24°C
(75°F)		 27°C
(80°F)		 29°C
(84°F)		 33°C
(91°F)		 33°C
(92°F)		 32°C
(91°F)		 29°C
(84°F)		 23°C
(74°F)		 21°C
(71°F)
Mean maximum 15°C
(59°F)		 16°C
(60°F)		 18°C
(65°F)		 22°C
(71°F)		 25°C
(78°F)		 27°C
(80°F)		 31°C
(89°F)		 33°C
(91°F)		 31°C
(88°F)		 27°C
(81°F)		 22°C
(72°F)		 17°C
(63°F)
Average high 10°C
(50°F)		 10°C
(51°F)		 14°C
(57°F)		 17°C
(64°F)		 22°C
(71°F)		 24°C
(76°F)		 28°C
(83°F)		 30°C
(86°F)		 27°C
(80°F)		 22°C
(72°F)		 17°C
(64°F)		 12°C
(54°F)
Daily mean 8°C
(46°F)		 8°C
(47°F)		 12°C
(53°F)		 15°C
(59°F)		 19°C
(67°F)		 22°C
(73°F)		 26°C
(79°F)		 28°C
(83°F)		 25°C
(77°F)		 20°C
(69°F)		 15°C
(59°F)		 10°C
(50°F)
Average low 6°C
(43°F)		 6°C
(43°F)		 9°C
(49°F)		 12°C
(55°F)		 17°C
(63°F)		 21°C
(69°F)		 25°C
(77°F)		 26°C
(79°F)		 23°C
(74°F)		 18°C
(65°F)		 13°C
(56°F)		 8°C
(47°F)
Mean minimum 2°C
(36°F)		 1°C
(35°F)		 5°C
(42°F)		 8°C
(47°F)		 12°C
(55°F)		 18°C
(64°F)		 22°C
(71°F)		 23°C
(74°F)		 19°C
(67°F)		 14°C
(57°F)		 8°C
(47°F)		 3°C
(38°F)
Minimum -1°C
(31°F)		 -0°C
(31°F)		 5°C
(41°F)		 7°C
(45°F)		 11°C
(53°F)		 17°C
(63°F)		 20°C
(68°F)		 21°C
(70°F)		 19°C
(66°F)		 13°C
(56°F)		 7°C
(45°F)		 1°C
(35°F)

Compare climate in Karatsu with other places

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

Monthly average precipitation in Karatsu, Saga, Japan §

Karatsu usually has the most precipitation in July, August and September, with an average of 15 rainy days and 267 mm (10.5 inches) of precipitation per month.The driest months in Karatsu are January, November and December. On average, 68 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Karatsu, Saga, 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) 69 (2.7) 84 (3.3) 136 (5.4) 115 (4.5) 153 (6.0) 191 (7.5) 323 (12.7) 266 (10.5) 210 (8.3) 112 (4.4) 53 (2.1) 81 (3.2)
Average precipitation days (≥ 1 mm) 9 11 11 9 11 13 18 13 16 10 7 9

Monthly sunshine hours in Karatsu, Saga, Japan §

The sunniest months in Karatsu are May, July and August, when the sun shines an average of 9 hours 28 minutes a day.Least sunny months in Karatsu: January, February and December receive an average of 6 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Karatsu, Saga, 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 178 229 261 280 293 282 283 305 257 254 236 211
Mean daily daylight hours 10h 11m 10h 58m 11h 58m 13h 0m 13h 53m 14h 18m 14h 5m 13h 20m 12h 20m 11h 19m 10h 25m 9h 57m

Solar UV radiation in Karatsu, Saga, Japan §

Karatsu experiences the highest level of ultraviolet (UV) radiation in July, August and September, 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 Karatsu UV Index data.

Average daily maximum UV levels by month for Karatsu, Saga, 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 10 11 11 12 12 11 7 6 4