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Monthly climate in Iizuka, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Iizuka features a humid subtropical climate (Cfa). Temperatures typically range between 6 °C (44 °F) and 29 °C (84 °F) through the year, but rarely can drop to -4 °C (26 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 1631 mm (64.2 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually. Iizuka enjoys an average of 3050 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 Iizuka, Japan

The warmest months in Iizuka 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 6 to 8 °C (44 - 47 °F) throughout the day. On average each year, Iizuka experiences 116 days above 25 °C (77.0 °F) and 7 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Iizuka. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(63°F)		23°C
(73°F)		24°C
(75°F)		27°C
(81°F)		32°C
(89°F)		33°C
(91°F)		36°C
(97°F)		38°C
(100°F)		35°C
(95°F)		31°C
(89°F)		26°C
(80°F)		23°C
(73°F)
Mean maximum15°C
(60°F)		18°C
(64°F)		22°C
(72°F)		26°C
(79°F)		30°C
(86°F)		30°C
(87°F)		35°C
(94°F)		36°C
(97°F)		33°C
(91°F)		29°C
(85°F)		24°C
(75°F)		18°C
(65°F)
Average high10°C
(50°F)		11°C
(52°F)		16°C
(61°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 mean6°C
(44°F)		7°C
(45°F)		11°C
(53°F)		16°C
(60°F)		20°C
(69°F)		23°C
(74°F)		27°C
(81°F)		29°C
(84°F)		25°C
(77°F)		20°C
(68°F)		14°C
(57°F)		8°C
(47°F)
Average low3°C
(38°F)		4°C
(39°F)		7°C
(46°F)		11°C
(52°F)		16°C
(61°F)		20°C
(68°F)		24°C
(76°F)		26°C
(78°F)		22°C
(72°F)		16°C
(62°F)		10°C
(50°F)		5°C
(41°F)
Mean minimum-1°C
(30°F)		-1°C
(30°F)		2°C
(35°F)		5°C
(41°F)		9°C
(49°F)		16°C
(62°F)		21°C
(70°F)		22°C
(72°F)		16°C
(62°F)		10°C
(51°F)		3°C
(38°F)		0°C
(33°F)
Minimum-3°C
(27°F)		-4°C
(26°F)		0°C
(33°F)		4°C
(39°F)		7°C
(46°F)		15°C
(60°F)		18°C
(65°F)		20°C
(68°F)		15°C
(59°F)		9°C
(49°F)		2°C
(35°F)		-1°C
(31°F)

Compare climate in Iizuka with other places

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

Monthly average precipitation in Iizuka, Japan

Iizuka usually has the most precipitation in July, August and September, with an average of 15 rainy days and 252 mm (9.9 inches) of precipitation per month. The driest months in Iizuka are January, November and December. On average, 52 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Iizuka. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)53 (2.1)68 (2.7)118 (4.7)109 (4.3)135 (5.3)180 (7.1)298 (11.7)255 (10.0)202 (8.0)110 (4.3)43 (1.7)59 (2.3)
Average precipitation days (≥ 1 mm)8811910131814151067

Monthly sunshine hours in Iizuka, Japan

The sunniest months in Iizuka are April, May and August, when the sun shines an average of 9 hours 29 minutes a day. Least sunny months in Iizuka: January, February and December receive an average of 6 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Iizuka. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours177233261278293275273301251251235217
Mean daily daylight hours10h 10m10h 57m11h 58m13h 1m13h 53m14h 20m14h 6m13h 21m12h 21m11h 19m10h 24m9h 56m

Solar UV radiation in Iizuka, Japan

Iizuka 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 Iizuka UV Index data.

Average daily maximum UV levels by month for Iizuka. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468111111121211764