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Monthly climate in Tome, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tome features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (35 °F) and 25 °C (78 °F) through the year, but rarely can drop to -11 °C (13 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1180 mm (46.4 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Tome enjoys an average of 2773 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 48 minutes per day.

Monthly average temperatures in Tome, Japan

The warmest months in Tome are July, August and September, with daily mean temperatures ranging from 21 to 25 °C (71 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 4 °C (35 - 39 °F) throughout the day. On average each year, Tome experiences 68 days above 25 °C (77.0 °F) and 62 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Tome. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(54°F)		15°C
(60°F)		22°C
(72°F)		26°C
(80°F)		32°C
(90°F)		32°C
(91°F)		35°C
(95°F)		36°C
(97°F)		35°C
(95°F)		28°C
(83°F)		21°C
(70°F)		16°C
(61°F)
Mean maximum10°C
(50°F)		13°C
(55°F)		19°C
(66°F)		23°C
(74°F)		29°C
(84°F)		28°C
(83°F)		33°C
(92°F)		35°C
(95°F)		31°C
(89°F)		26°C
(80°F)		20°C
(68°F)		14°C
(57°F)
Average high5°C
(41°F)		6°C
(44°F)		11°C
(52°F)		15°C
(60°F)		21°C
(71°F)		24°C
(75°F)		27°C
(81°F)		29°C
(84°F)		25°C
(78°F)		20°C
(67°F)		14°C
(57°F)		7°C
(45°F)
Daily mean2°C
(35°F)		3°C
(37°F)		6°C
(44°F)		11°C
(51°F)		17°C
(62°F)		20°C
(68°F)		24°C
(75°F)		25°C
(78°F)		21°C
(71°F)		16°C
(60°F)		9°C
(49°F)		4°C
(39°F)
Average low-1°C
(30°F)		-1°C
(31°F)		2°C
(36°F)		6°C
(43°F)		12°C
(54°F)		16°C
(61°F)		21°C
(70°F)		22°C
(72°F)		18°C
(65°F)		12°C
(53°F)		5°C
(41°F)		0°C
(33°F)
Mean minimum-6°C
(22°F)		-4°C
(25°F)		-2°C
(28°F)		-1°C
(31°F)		7°C
(44°F)		13°C
(55°F)		16°C
(62°F)		17°C
(63°F)		12°C
(53°F)		5°C
(42°F)		-2°C
(29°F)		-3°C
(26°F)
Minimum-11°C
(13°F)		-6°C
(21°F)		-4°C
(25°F)		-1°C
(31°F)		5°C
(42°F)		10°C
(51°F)		16°C
(60°F)		13°C
(56°F)		8°C
(47°F)		3°C
(38°F)		-3°C
(26°F)		-5°C
(23°F)

Compare climate in Tome with other places

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

Monthly average precipitation in Tome, Japan

Tome usually has the most precipitation in July, August and October, with an average of 15 rainy days and 168 mm (6.6 inches) of precipitation per month. The driest months in Tome are January, February and November. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tome. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)43 (1.7)42 (1.7)100 (3.9)100 (4.0)93 (3.6)92 (3.6)170 (6.7)162 (6.4)114 (4.5)172 (6.8)37 (1.5)54 (2.1)
Average precipitation days (≥ 1 mm)981112111217171311610

Monthly sunshine hours in Tome, Japan

The sunniest months in Tome are April, May and June, when the sun shines an average of 8 hours 53 minutes a day. Least sunny months in Tome: January, October and December receive an average of 6 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tome. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours166222254263282262227238233201215204
Mean daily daylight hours9h 46m10h 43m11h 57m13h 12m14h 16m14h 48m14h 32m13h 36m12h 24m11h 9m10h 3m9h 29m

Solar UV radiation in Tome, Japan

Tome experiences the highest level of ultraviolet (UV) radiation in June, 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 4. For more detailed information, check out our hourly Tome UV Index data.

Average daily maximum UV levels by month for Tome. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891011109643