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Monthly climate in Nagaoka, Niigata, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Nagaoka features a humid subtropical climate (Cfa).Temperatures typically range between 2 °C (37 °F) and 27 °C (82 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 1885 mm (74.2 inches) and receives 211 rainy days on the 1 mm (0.04 inches) threshold annually.Nagaoka enjoys an average of 2892 hours of sunshine throughout the year, and daylight varies from 9 hours 36 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Nagaoka, Niigata, Japan §

The warmest months in Nagaoka are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (73 - 82 °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 - 41 °F) throughout the day. On average each year, Nagaoka experiences 96 days above 25 °C (77.0 °F) and 41 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nagaoka, 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 13°C
(55°F)		 18°C
(64°F)		 22°C
(71°F)		 27°C
(80°F)		 33°C
(92°F)		 34°C
(93°F)		 40°C
(105°F)		 40°C
(104°F)		 38°C
(100°F)		 33°C
(91°F)		 25°C
(77°F)		 20°C
(68°F)
Mean maximum 10°C
(50°F)		 13°C
(55°F)		 20°C
(68°F)		 24°C
(76°F)		 30°C
(86°F)		 30°C
(86°F)		 35°C
(95°F)		 38°C
(101°F)		 33°C
(92°F)		 29°C
(84°F)		 22°C
(72°F)		 15°C
(60°F)
Average high 5°C
(42°F)		 6°C
(44°F)		 12°C
(53°F)		 16°C
(62°F)		 23°C
(73°F)		 26°C
(79°F)		 30°C
(86°F)		 32°C
(89°F)		 27°C
(81°F)		 21°C
(70°F)		 15°C
(59°F)		 8°C
(47°F)
Daily mean 2°C
(37°F)		 3°C
(38°F)		 7°C
(45°F)		 12°C
(53°F)		 18°C
(64°F)		 21°C
(71°F)		 26°C
(79°F)		 27°C
(82°F)		 23°C
(73°F)		 17°C
(63°F)		 11°C
(52°F)		 5°C
(41°F)
Average low -0°C
(32°F)		 -0°C
(32°F)		 3°C
(38°F)		 7°C
(45°F)		 13°C
(55°F)		 17°C
(63°F)		 23°C
(73°F)		 24°C
(75°F)		 19°C
(67°F)		 13°C
(56°F)		 7°C
(45°F)		 2°C
(36°F)
Mean minimum -5°C
(23°F)		 -5°C
(23°F)		 -2°C
(29°F)		 1°C
(34°F)		 7°C
(45°F)		 13°C
(56°F)		 20°C
(68°F)		 19°C
(67°F)		 13°C
(56°F)		 7°C
(46°F)		 0°C
(33°F)		 -3°C
(27°F)
Minimum -10°C
(14°F)		 -7°C
(20°F)		 -4°C
(24°F)		 -1°C
(30°F)		 6°C
(44°F)		 11°C
(51°F)		 19°C
(66°F)		 16°C
(61°F)		 12°C
(54°F)		 7°C
(45°F)		 -1°C
(30°F)		 -5°C
(23°F)

Compare climate in Nagaoka with other places

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

Monthly average precipitation in Nagaoka, Niigata, Japan §

Nagaoka usually has the most precipitation in July, August and December, with an average of 20 rainy days and 225 mm (8.8 inches) of precipitation per month.The driest months in Nagaoka are April, May and June. On average, 111 mm (4.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nagaoka, 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) 165 (6.5) 138 (5.4) 130 (5.1) 114 (4.5) 110 (4.3) 108 (4.3) 283 (11.2) 186 (7.3) 151 (5.9) 158 (6.2) 139 (5.5) 204 (8.0)
Average precipitation days (≥ 1 mm) 21 22 18 14 14 13 18 17 16 15 18 25

Monthly sunshine hours in Nagaoka, Niigata, Japan §

The sunniest months in Nagaoka are May, June and August, when the sun shines an average of 9 hours 43 minutes a day.Least sunny months in Nagaoka: January, February and December receive an average of 5 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nagaoka, 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 142 195 245 274 303 291 280 299 253 219 208 178
Mean daily daylight hours 9h 53m 10h 47m 11h 57m 13h 9m 14h 10m 14h 41m 14h 25m 13h 32m 12h 23m 11h 12m 10h 9m 9h 36m

Solar UV radiation in Nagaoka, Niigata, Japan §

Nagaoka experiences the highest level of ultraviolet (UV) radiation in May, 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 Nagaoka UV Index data.

Average daily maximum UV levels by month for Nagaoka, 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 4 7 9 10 10 11 11 9 6 4 3