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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 4 °C (39 °F) and 26 °C (79 °F) through the year, but rarely can drop to -9 °C (17 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2012 mm (79.2 inches) and receives 181 rainy days on the 1 mm (0.04 inches) threshold annually. Tomioka enjoys an average of 2867 hours of sunshine throughout the year, and daylight varies from 9 hours 43 minutes to 14 hours 34 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 4 to 6 °C (39 - 43 °F) throughout the day. On average each year, Tomioka experiences 79 days above 25 °C (77.0 °F) and 34 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
Maximum17°C
(62°F)		22°C
(72°F)		26°C
(78°F)		28°C
(83°F)		32°C
(90°F)		32°C
(91°F)		36°C
(97°F)		36°C
(97°F)		34°C
(93°F)		31°C
(89°F)		23°C
(74°F)		20°C
(67°F)
Mean maximum15°C
(59°F)		18°C
(65°F)		23°C
(73°F)		26°C
(79°F)		30°C
(87°F)		28°C
(83°F)		33°C
(92°F)		34°C
(94°F)		31°C
(89°F)		28°C
(82°F)		21°C
(70°F)		17°C
(63°F)
Average high8°C
(48°F)		10°C
(50°F)		14°C
(57°F)		18°C
(64°F)		23°C
(73°F)		24°C
(76°F)		28°C
(82°F)		30°C
(86°F)		25°C
(77°F)		20°C
(68°F)		16°C
(61°F)		11°C
(52°F)
Daily mean4°C
(39°F)		5°C
(41°F)		9°C
(48°F)		13°C
(55°F)		18°C
(65°F)		21°C
(69°F)		24°C
(76°F)		26°C
(79°F)		22°C
(71°F)		16°C
(62°F)		11°C
(52°F)		6°C
(43°F)
Average low0°C
(32°F)		0°C
(33°F)		4°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
(66°F)		13°C
(56°F)		7°C
(44°F)		2°C
(36°F)
Mean minimum-4°C
(25°F)		-4°C
(25°F)		-1°C
(30°F)		2°C
(36°F)		7°C
(44°F)		13°C
(56°F)		18°C
(64°F)		19°C
(66°F)		14°C
(57°F)		7°C
(46°F)		1°C
(34°F)		-1°C
(30°F)
Minimum-7°C
(19°F)		-9°C
(17°F)		-3°C
(28°F)		-0°C
(32°F)		5°C
(41°F)		11°C
(53°F)		16°C
(62°F)		14°C
(58°F)		12°C
(54°F)		6°C
(42°F)		-1°C
(30°F)		-2°C
(29°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 21 rainy days and 304 mm (12.0 inches) of precipitation per month. The driest months in Tomioka are February, November and December. On average, 53 mm (2.1 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)57 (2.3)55 (2.2)134 (5.3)148 (5.8)174 (6.8)212 (8.3)338 (13.3)214 (8.4)256 (10.1)319 (12.6)50 (2.0)54 (2.1)
Average precipitation days (≥ 1 mm)98131415192423212078

Monthly sunshine hours in Tomioka, Japan

The sunniest months in Tomioka are April, May and August, when the sun shines an average of 9 hours 0 minutes a day. Least sunny months in Tomioka: January, September and October receive an average of 6 hours 36 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 hours186232259277278263230271218202222224
Mean daily daylight hours9h 58m10h 50m11h 57m13h 6m14h 5m14h 34m14h 19m13h 28m12h 22m11h 14m10h 14m9h 43m

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 11 - 11, which corresponds to the Extreme category of sun exposure. January, November 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)46891111111110753