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Monthly climate in Joetsu, Niigata, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Joetsu features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (38 °F) and 27 °C (82 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 2123 mm (83.6 inches) and receives 208 rainy days on the 1 mm (0.04 inches) threshold annually.Joetsu enjoys an average of 2979 hours of sunshine throughout the year, and daylight varies from 9 hours 38 minutes to 14 hours 39 minutes per day.

Monthly average temperatures in Joetsu, Niigata, Japan §

The warmest months in Joetsu are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (74 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 6 °C (38 - 43 °F) throughout the day. On average each year, Joetsu experiences 77 days above 25 °C (77.0 °F) and 17 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Joetsu, Niigata, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(57°F)		 17°C
(63°F)		 20°C
(68°F)		 24°C
(76°F)		 29°C
(85°F)		 32°C
(89°F)		 38°C
(101°F)		 38°C
(100°F)		 36°C
(97°F)		 32°C
(89°F)		 24°C
(75°F)		 20°C
(69°F)
Mean maximum 11°C
(51°F)		 13°C
(56°F)		 18°C
(65°F)		 22°C
(72°F)		 27°C
(81°F)		 28°C
(82°F)		 33°C
(92°F)		 36°C
(97°F)		 32°C
(89°F)		 27°C
(82°F)		 22°C
(72°F)		 16°C
(60°F)
Average high 6°C
(42°F)		 6°C
(44°F)		 11°C
(52°F)		 15°C
(59°F)		 21°C
(70°F)		 24°C
(75°F)		 28°C
(83°F)		 30°C
(87°F)		 26°C
(79°F)		 20°C
(69°F)		 15°C
(59°F)		 9°C
(48°F)
Daily mean 3°C
(38°F)		 4°C
(39°F)		 8°C
(46°F)		 12°C
(53°F)		 17°C
(64°F)		 21°C
(70°F)		 26°C
(79°F)		 27°C
(82°F)		 23°C
(74°F)		 18°C
(64°F)		 12°C
(53°F)		 6°C
(43°F)
Average low 1°C
(35°F)		 1°C
(35°F)		 4°C
(40°F)		 8°C
(47°F)		 14°C
(57°F)		 18°C
(65°F)		 23°C
(74°F)		 25°C
(77°F)		 20°C
(69°F)		 15°C
(59°F)		 9°C
(48°F)		 4°C
(39°F)
Mean minimum -2°C
(29°F)		 -3°C
(27°F)		 0°C
(33°F)		 3°C
(37°F)		 8°C
(47°F)		 14°C
(58°F)		 20°C
(69°F)		 21°C
(69°F)		 15°C
(60°F)		 10°C
(50°F)		 3°C
(38°F)		 -0°C
(32°F)
Minimum -5°C
(24°F)		 -4°C
(25°F)		 -2°C
(29°F)		 2°C
(35°F)		 8°C
(46°F)		 12°C
(53°F)		 19°C
(67°F)		 17°C
(63°F)		 14°C
(57°F)		 9°C
(48°F)		 1°C
(34°F)		 -2°C
(29°F)

Compare climate in Joetsu with other places

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

Monthly average precipitation in Joetsu, Niigata, Japan §

Joetsu usually has the most precipitation in January, July and December, with an average of 21 rainy days and 265 mm (10.4 inches) of precipitation per month.The driest months in Joetsu are April, May and June. On average, 110 mm (4.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Joetsu, Niigata, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 233 (9.2) 181 (7.1) 128 (5.0) 121 (4.7) 105 (4.1) 105 (4.1) 290 (11.4) 157 (6.2) 171 (6.7) 190 (7.5) 170 (6.7) 273 (10.7)
Average precipitation days (≥ 1 mm) 22 21 19 14 13 11 17 16 17 16 18 24

Monthly sunshine hours in Joetsu, Niigata, Japan §

The sunniest months in Joetsu are May, June and August, when the sun shines an average of 9 hours 44 minutes a day.Least sunny months in Joetsu: January, February and December receive an average of 6 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Joetsu, Niigata, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 161 213 257 280 304 292 278 299 254 222 217 198
Mean daily daylight hours 9h 54m 10h 48m 11h 57m 13h 9m 14h 9m 14h 39m 14h 24m 13h 31m 12h 23m 11h 12m 10h 10m 9h 38m

Solar UV radiation in Joetsu, Niigata, Japan §

Joetsu 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 Joetsu UV Index data.

Average daily maximum UV levels by month for Joetsu, Niigata, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 8 9 10 11 11 11 9 6 5 3