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Monthly climate in Namerikawa, Japan

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Namerikawa features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (37 °F) and 27 °C (80 °F) through the year, but rarely can drop to -6 °C (22 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 2495 mm (98.2 inches) and receives 216 rainy days on the 1 mm (0.04 inches) threshold annually. Namerikawa enjoys an average of 2937 hours of sunshine throughout the year, and daylight varies from 9 hours 40 minutes to 14 hours 37 minutes per day.

Monthly average temperatures in Namerikawa, Japan

The warmest months in Namerikawa are July, August and September, with daily mean temperatures ranging from 22 to 27 °C (73 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (37 - 42 °F) throughout the day. On average each year, Namerikawa experiences 75 days above 25 °C (77.0 °F) and 40 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Namerikawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		18°C
(64°F)		21°C
(71°F)		27°C
(81°F)		30°C
(85°F)		30°C
(87°F)		34°C
(93°F)		35°C
(96°F)		34°C
(94°F)		31°C
(87°F)		25°C
(76°F)		21°C
(71°F)
Mean maximum11°C
(51°F)		12°C
(55°F)		20°C
(68°F)		23°C
(73°F)		28°C
(83°F)		28°C
(82°F)		32°C
(90°F)		34°C
(93°F)		30°C
(87°F)		27°C
(81°F)		22°C
(71°F)		16°C
(60°F)
Average high5°C
(41°F)		6°C
(42°F)		11°C
(52°F)		16°C
(60°F)		21°C
(71°F)		24°C
(75°F)		28°C
(83°F)		30°C
(86°F)		25°C
(78°F)		20°C
(68°F)		14°C
(58°F)		8°C
(47°F)
Daily mean2°C
(37°F)		3°C
(37°F)		7°C
(45°F)		12°C
(53°F)		17°C
(64°F)		21°C
(69°F)		25°C
(78°F)		27°C
(80°F)		22°C
(73°F)		17°C
(62°F)		11°C
(52°F)		5°C
(42°F)
Average low0°C
(32°F)		0°C
(33°F)		3°C
(38°F)		8°C
(46°F)		13°C
(57°F)		17°C
(64°F)		23°C
(73°F)		24°C
(75°F)		20°C
(68°F)		14°C
(57°F)		8°C
(46°F)		3°C
(37°F)
Mean minimum-4°C
(25°F)		-4°C
(26°F)		-2°C
(29°F)		1°C
(34°F)		7°C
(44°F)		13°C
(56°F)		20°C
(68°F)		20°C
(68°F)		15°C
(59°F)		9°C
(48°F)		3°C
(37°F)		-3°C
(27°F)
Minimum-5°C
(23°F)		-6°C
(22°F)		-3°C
(27°F)		-3°C
(27°F)		5°C
(42°F)		10°C
(51°F)		19°C
(66°F)		16°C
(61°F)		12°C
(54°F)		8°C
(46°F)		1°C
(34°F)		-4°C
(24°F)

Compare climate in Namerikawa with other places

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

Monthly average precipitation in Namerikawa, Japan

Namerikawa usually has the most precipitation in July, August and December, with an average of 21 rainy days and 284 mm (11.2 inches) of precipitation per month. The driest months in Namerikawa are March, May and November. On average, 153 mm (6.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Namerikawa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)197 (7.8)179 (7.0)167 (6.6)179 (7.0)158 (6.2)190 (7.5)357 (14.0)264 (10.4)223 (8.8)216 (8.5)135 (5.3)231 (9.1)
Average precipitation days (≥ 1 mm)212017151515231917171423

Monthly sunshine hours in Namerikawa, Japan

The sunniest months in Namerikawa are May, June and August, when the sun shines an average of 9 hours 42 minutes a day. Least sunny months in Namerikawa: January, February and December receive an average of 5 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Namerikawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours143203258277301291279300248227218187
Mean daily daylight hours9h 56m10h 49m11h 57m13h 8m14h 7m14h 37m14h 22m13h 30m12h 23m11h 13m10h 12m9h 40m

Solar UV radiation in Namerikawa, Japan

Namerikawa experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the 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 Namerikawa UV Index data.

Average daily maximum UV levels by month for Namerikawa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)458101011111110753