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Monthly climate in Tosashimizu, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tosashimizu features a humid subtropical climate (Cfa). Temperatures typically range between 11 °C (52 °F) and 28 °C (82 °F) through the year, but rarely can drop to 2 °C (37 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 2313 mm (91.1 inches) and receives 143 rainy days on the 1 mm (0.04 inches) threshold annually. Tosashimizu enjoys an average of 3137 hours of sunshine throughout the year, and daylight varies from 10 hours 1 minutes to 14 hours 15 minutes per day.

Monthly average temperatures in Tosashimizu, Japan

The warmest months in Tosashimizu are July, August and September, with daily mean temperatures ranging from 26 to 28 °C (79 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 11 to 13 °C (52 - 56 °F) throughout the day. On average each year, Tosashimizu experiences 87 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 Tosashimizu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(68°F)		20°C
(68°F)		20°C
(69°F)		23°C
(73°F)		24°C
(76°F)		26°C
(80°F)		30°C
(86°F)		31°C
(88°F)		29°C
(85°F)		28°C
(82°F)		24°C
(76°F)		22°C
(72°F)
Mean maximum18°C
(65°F)		18°C
(65°F)		19°C
(67°F)		21°C
(71°F)		24°C
(75°F)		26°C
(79°F)		29°C
(84°F)		30°C
(86°F)		29°C
(84°F)		27°C
(81°F)		23°C
(74°F)		20°C
(68°F)
Average high12°C
(55°F)		13°C
(55°F)		16°C
(61°F)		18°C
(65°F)		21°C
(71°F)		24°C
(75°F)		27°C
(81°F)		28°C
(83°F)		27°C
(81°F)		24°C
(75°F)		19°C
(67°F)		15°C
(59°F)
Daily mean11°C
(52°F)		11°C
(52°F)		14°C
(58°F)		17°C
(63°F)		20°C
(69°F)		23°C
(74°F)		26°C
(79°F)		28°C
(82°F)		26°C
(79°F)		22°C
(73°F)		18°C
(64°F)		13°C
(56°F)
Average low9°C
(49°F)		9°C
(49°F)		13°C
(55°F)		16°C
(60°F)		19°C
(67°F)		22°C
(72°F)		25°C
(78°F)		27°C
(81°F)		25°C
(77°F)		21°C
(71°F)		17°C
(62°F)		11°C
(53°F)
Mean minimum5°C
(41°F)		5°C
(41°F)		7°C
(45°F)		11°C
(51°F)		16°C
(61°F)		20°C
(69°F)		23°C
(74°F)		25°C
(77°F)		22°C
(72°F)		17°C
(63°F)		11°C
(53°F)		6°C
(43°F)
Minimum2°C
(37°F)		3°C
(37°F)		6°C
(43°F)		9°C
(49°F)		14°C
(58°F)		19°C
(67°F)		22°C
(71°F)		22°C
(72°F)		21°C
(70°F)		16°C
(61°F)		10°C
(51°F)		4°C
(40°F)

Compare climate in Tosashimizu with other places

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

Monthly average precipitation in Tosashimizu, Japan

Tosashimizu usually has the most precipitation in July, September and October, with an average of 15 rainy days and 302 mm (11.9 inches) of precipitation per month. The driest months in Tosashimizu are January, November and December. On average, 89 mm (3.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tosashimizu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)74 (2.9)113 (4.4)166 (6.5)165 (6.5)209 (8.2)261 (10.3)363 (14.3)225 (8.9)275 (10.8)269 (10.6)104 (4.1)89 (3.5)
Average precipitation days (≥ 1 mm)710141011141715171288

Monthly sunshine hours in Tosashimizu, Japan

The sunniest months in Tosashimizu are May, July and August, when the sun shines an average of 9 hours 36 minutes a day. Least sunny months in Tosashimizu: January, February and December receive an average of 7 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tosashimizu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours188232270288292270289310271258242221
Mean daily daylight hours10h 14m10h 59m11h 58m12h 59m13h 50m14h 15m14h 2m13h 18m12h 20m11h 20m10h 27m10h 1m

Solar UV radiation in Tosashimizu, Japan

Tosashimizu experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 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 Tosashimizu UV Index data.

Average daily maximum UV levels by month for Tosashimizu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)469101212121210764