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Monthly climate in Shiojiri, Nagano, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Shiojiri features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 23 °C (74 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 33 °C (92 °F).The average annual precipitation amounts to about 1741 mm (68.5 inches) and receives 162 rainy days on the 1 mm (0.04 inches) threshold annually.Shiojiri enjoys an average of 2983 hours of sunshine throughout the year, and daylight varies from 9 hours 44 minutes to 14 hours 33 minutes per day.

Monthly average temperatures in Shiojiri, Nagano, Japan §

The warmest months in Shiojiri are July, August and September, with daily mean temperatures ranging from 19 to 23 °C (66 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (29 - 34 °F) throughout the day. On average each year, Shiojiri experiences 53 days above 25 °C (77.0 °F) and 112 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Shiojiri, Nagano, 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 12°C
(53°F)		 15°C
(60°F)		 20°C
(68°F)		 26°C
(78°F)		 29°C
(85°F)		 29°C
(84°F)		 33°C
(91°F)		 33°C
(92°F)		 30°C
(86°F)		 26°C
(79°F)		 18°C
(65°F)		 16°C
(62°F)
Mean maximum 9°C
(48°F)		 11°C
(53°F)		 17°C
(64°F)		 22°C
(71°F)		 27°C
(81°F)		 26°C
(79°F)		 30°C
(87°F)		 32°C
(90°F)		 28°C
(82°F)		 25°C
(77°F)		 18°C
(64°F)		 12°C
(54°F)
Average high 3°C
(37°F)		 4°C
(40°F)		 10°C
(50°F)		 14°C
(58°F)		 20°C
(68°F)		 23°C
(73°F)		 26°C
(79°F)		 28°C
(83°F)		 23°C
(74°F)		 18°C
(64°F)		 12°C
(54°F)		 6°C
(42°F)
Daily mean -2°C
(29°F)		 -1°C
(30°F)		 4°C
(40°F)		 9°C
(48°F)		 15°C
(58°F)		 18°C
(65°F)		 22°C
(72°F)		 23°C
(74°F)		 19°C
(66°F)		 13°C
(56°F)		 7°C
(44°F)		 1°C
(34°F)
Average low -6°C
(22°F)		 -5°C
(22°F)		 -1°C
(31°F)		 3°C
(38°F)		 9°C
(49°F)		 13°C
(56°F)		 18°C
(65°F)		 19°C
(67°F)		 15°C
(60°F)		 9°C
(49°F)		 2°C
(36°F)		 -3°C
(28°F)
Mean minimum -13°C
(8°F)		 -14°C
(7°F)		 -5°C
(23°F)		 -4°C
(25°F)		 1°C
(34°F)		 8°C
(47°F)		 15°C
(60°F)		 15°C
(60°F)		 9°C
(49°F)		 2°C
(36°F)		 -3°C
(27°F)		 -8°C
(18°F)
Minimum -18°C
(0°F)		 -18°C
(-0°F)		 -7°C
(19°F)		 -6°C
(21°F)		 -1°C
(31°F)		 5°C
(41°F)		 14°C
(58°F)		 12°C
(53°F)		 6°C
(42°F)		 0°C
(33°F)		 -4°C
(25°F)		 -9°C
(16°F)

Compare climate in Shiojiri with other places

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

Monthly average precipitation in Shiojiri, Nagano, Japan §

Shiojiri usually has the most precipitation in July, September and October, with an average of 17 rainy days and 232 mm (9.1 inches) of precipitation per month.The driest months in Shiojiri are January, February and November. On average, 74 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Shiojiri, Nagano, 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) 75 (3.0) 80 (3.2) 141 (5.6) 143 (5.6) 155 (6.1) 149 (5.8) 289 (11.4) 151 (5.9) 171 (6.7) 237 (9.3) 66 (2.6) 84 (3.3)
Average precipitation days (≥ 1 mm) 12 10 12 13 12 14 19 16 16 16 10 12

Monthly sunshine hours in Shiojiri, Nagano, Japan §

The sunniest months in Shiojiri are April, May and August, when the sun shines an average of 9 hours 21 minutes a day.Least sunny months in Shiojiri: January, October and December receive an average of 6 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Shiojiri, Nagano, 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 188 236 268 284 292 266 235 284 238 223 238 227
Mean daily daylight hours 9h 59m 10h 51m 11h 57m 13h 6m 14h 4m 14h 33m 14h 18m 13h 28m 12h 22m 11h 14m 10h 15m 9h 44m

Solar UV radiation in Shiojiri, Nagano, Japan §

Shiojiri 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 Shiojiri UV Index data.

Average daily maximum UV levels by month for Shiojiri, Nagano, 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) 4 6 9 10 11 11 12 12 10 7 5 4