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Monthly climate in Tomioka, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tomioka features a humid subtropical climate (Cfa). Temperatures typically range between 3 °C (38 °F) and 26 °C (79 °F) through the year, but rarely can drop to -6 °C (21 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1523 mm (60.0 inches) and receives 139 rainy days on the 1 mm (0.04 inches) threshold annually. Tomioka enjoys an average of 2997 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 40 minutes per day.

Monthly average temperatures in Tomioka, Japan

The warmest months in Tomioka are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (71 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 5 °C (38 - 42 °F) throughout the day. On average each year, Tomioka experiences 66 days above 25 °C (77.0 °F) and 31 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Tomioka. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		19°C
(66°F)		22°C
(72°F)		27°C
(82°F)		29°C
(85°F)		31°C
(89°F)		35°C
(95°F)		35°C
(96°F)		33°C
(92°F)		29°C
(84°F)		23°C
(73°F)		18°C
(66°F)
Mean maximum12°C
(54°F)		15°C
(60°F)		19°C
(67°F)		24°C
(75°F)		28°C
(83°F)		27°C
(81°F)		32°C
(90°F)		34°C
(93°F)		31°C
(88°F)		27°C
(80°F)		21°C
(70°F)		16°C
(60°F)
Average high7°C
(44°F)		8°C
(47°F)		12°C
(53°F)		16°C
(61°F)		21°C
(70°F)		23°C
(74°F)		27°C
(81°F)		29°C
(84°F)		25°C
(77°F)		20°C
(68°F)		15°C
(59°F)		9°C
(49°F)
Daily mean3°C
(38°F)		4°C
(40°F)		8°C
(46°F)		12°C
(53°F)		17°C
(63°F)		20°C
(68°F)		24°C
(75°F)		26°C
(79°F)		22°C
(71°F)		17°C
(62°F)		11°C
(52°F)		5°C
(42°F)
Average low0°C
(33°F)		1°C
(34°F)		3°C
(39°F)		8°C
(46°F)		13°C
(56°F)		17°C
(63°F)		21°C
(71°F)		23°C
(74°F)		19°C
(67°F)		14°C
(57°F)		8°C
(46°F)		2°C
(36°F)
Mean minimum-4°C
(25°F)		-3°C
(28°F)		-2°C
(30°F)		2°C
(35°F)		7°C
(46°F)		13°C
(55°F)		17°C
(63°F)		19°C
(66°F)		14°C
(58°F)		8°C
(47°F)		1°C
(35°F)		-2°C
(29°F)
Minimum-6°C
(21°F)		-3°C
(26°F)		-3°C
(27°F)		1°C
(33°F)		7°C
(44°F)		10°C
(51°F)		16°C
(61°F)		16°C
(61°F)		12°C
(54°F)		7°C
(44°F)		0°C
(33°F)		-3°C
(27°F)

Compare climate in Tomioka with other places

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

Monthly average precipitation in Tomioka, Japan

Tomioka usually has the most precipitation in July, September and October, with an average of 16 rainy days and 214 mm (8.4 inches) of precipitation per month. The driest months in Tomioka are January, February and December. On average, 49 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tomioka. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)50 (2.0)38 (1.5)144 (5.7)121 (4.8)137 (5.4)121 (4.8)238 (9.4)151 (5.9)171 (6.7)233 (9.2)60 (2.4)60 (2.3)
Average precipitation days (≥ 1 mm)57101313141815171467

Monthly sunshine hours in Tomioka, Japan

The sunniest months in Tomioka are May, June and August, when the sun shines an average of 9 hours 25 minutes a day. Least sunny months in Tomioka: January, October and December receive an average of 6 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tomioka. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours182231265279293280261293247213230219
Mean daily daylight hours9h 53m10h 47m11h 57m13h 9m14h 9m14h 40m14h 25m13h 32m12h 23m11h 12m10h 9m9h 37m

Solar UV radiation in Tomioka, Japan

Tomioka 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 Tomioka UV Index data.

Average daily maximum UV levels by month for Tomioka. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3579101011119653