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Monthly climate in Heda, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Heda features a humid subtropical climate (Cfa). Temperatures typically range between 8 °C (46 °F) and 26 °C (80 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 31 °C (89 °F). The average annual precipitation amounts to about 2522 mm (99.3 inches) and receives 154 rainy days on the 1 mm (0.04 inches) threshold annually. Heda enjoys an average of 2859 hours of sunshine throughout the year, and daylight varies from 9 hours 49 minutes to 14 hours 27 minutes per day.

Monthly average temperatures in Heda, Japan

The warmest months in Heda are July, August and September, with daily mean temperatures ranging from 24 to 26 °C (75 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (46 - 51 °F) throughout the day. On average each year, Heda experiences 60 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 Heda. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(62°F)		17°C
(63°F)		19°C
(67°F)		22°C
(72°F)		24°C
(76°F)		26°C
(80°F)		31°C
(87°F)		31°C
(89°F)		30°C
(85°F)		27°C
(81°F)		22°C
(71°F)		19°C
(67°F)
Mean maximum14°C
(58°F)		15°C
(60°F)		18°C
(65°F)		20°C
(68°F)		23°C
(74°F)		25°C
(77°F)		28°C
(84°F)		31°C
(87°F)		29°C
(84°F)		26°C
(79°F)		21°C
(69°F)		17°C
(63°F)
Average high10°C
(50°F)		10°C
(50°F)		13°C
(56°F)		16°C
(61°F)		20°C
(68°F)		23°C
(73°F)		26°C
(79°F)		28°C
(83°F)		25°C
(78°F)		21°C
(70°F)		17°C
(62°F)		12°C
(54°F)
Daily mean8°C
(46°F)		8°C
(46°F)		11°C
(52°F)		14°C
(57°F)		18°C
(64°F)		21°C
(70°F)		24°C
(76°F)		26°C
(80°F)		24°C
(75°F)		19°C
(67°F)		15°C
(59°F)		10°C
(51°F)
Average low6°C
(43°F)		6°C
(43°F)		8°C
(47°F)		11°C
(53°F)		16°C
(61°F)		19°C
(67°F)		23°C
(74°F)		25°C
(77°F)		22°C
(72°F)		18°C
(64°F)		13°C
(56°F)		8°C
(47°F)
Mean minimum1°C
(35°F)		2°C
(36°F)		4°C
(40°F)		7°C
(45°F)		12°C
(54°F)		17°C
(63°F)		20°C
(69°F)		22°C
(72°F)		19°C
(66°F)		13°C
(56°F)		8°C
(47°F)		4°C
(39°F)
Minimum-0°C
(32°F)		1°C
(33°F)		3°C
(38°F)		5°C
(42°F)		12°C
(53°F)		16°C
(62°F)		19°C
(67°F)		21°C
(70°F)		17°C
(63°F)		13°C
(55°F)		6°C
(43°F)		1°C
(35°F)

Compare climate in Heda with other places

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

Monthly average precipitation in Heda, Japan

Heda usually has the most precipitation in June, July and October, with an average of 17 rainy days and 340 mm (13.4 inches) of precipitation per month. The driest months in Heda are January, February and December. On average, 84 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Heda. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)99 (3.9)219 (8.6)226 (8.9)236 (9.3)286 (11.3)437 (17.2)223 (8.8)242 (9.5)296 (11.6)102 (4.0)84 (3.3)
Average precipitation days (≥ 1 mm)681311121621161716108

Monthly sunshine hours in Heda, Japan

The sunniest months in Heda are April, May and August, when the sun shines an average of 8 hours 59 minutes a day. Least sunny months in Heda: January, October and November receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Heda. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours188224249260281252228285236201222226
Mean daily daylight hours10h 4m10h 53m11h 58m13h 4m14h 0m14h 27m14h 13m13h 25m12h 22m11h 16m10h 19m9h 49m

Solar UV radiation in Heda, Japan

Heda experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 12, 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 Heda UV Index data.

Average daily maximum UV levels by month for Heda. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)468101111121110754