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Jōetsu, Niigata Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Jōetsu, Niigata?
Jōetsu, Niigata gets 2575 mm of precipitation a year over about 176 rainy days. August is the warmest month (average high 31°C) and January the coldest (average low -1°C).
Humid subtropical climate
Jōetsu, Niigata has hot summers and chilly winters. Daytime highs range from about 6°C in January to 31°C in August. December is usually the wettest month. The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 0° | 7° |
| Spring | Mar–May | 6° | 17° |
| Summer | Jun–Aug | 20° | 29° |
| Autumn | Sep–Nov | 12° | 21° |
How much rain does Jōetsu get?
Jōetsu gets 2575 mm of precipitation in an average year, spread over about 176 days with measurable rain. That is more rainy days than 97% of Japan.
December is the wettest month, with 436 mm. May is the driest, with 77 mm. January has the most rainy days, about 23.
The longest dry spell in the last five years lasted 20 days, to July 25, 2026.
From October 2025 to September 2026 Jōetsu got 1004 mm of rain, against a normal of 2575 mm for those months. September 2026 had the most, with 615 mm.
Jōetsu weather by month
Jōetsu weather in January
In January, Jōetsu averages a high of 6°C and a low of -1°C. It gets 405 mm of precipitation over about 23 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The January record high is 18°C (2000) and the record low is -9°C (1985).
Jōetsu weather in February
In February, Jōetsu averages a high of 7°C and a low of -1°C. It gets 243 mm of precipitation over about 19 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The February record high is 22°C (2024) and the record low is -10°C (1978).
Jōetsu weather in March
In March, Jōetsu averages a high of 11°C and a low of 1°C. It gets 173 mm of precipitation over about 17 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The March record high is 29°C (2025) and the record low is -7°C (1984).
Jōetsu weather in April
In April, Jōetsu averages a high of 18°C and a low of 6°C. It gets 92 mm of precipitation over about 12 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The April record high is 32°C (1987) and the record low is -4°C (1972). April is one of the most comfortable months to visit.
Jōetsu weather in May
In May, Jōetsu averages a high of 23°C and a low of 11°C. It gets 77 mm of precipitation over about 9 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The May record high is 33°C (2006) and the record low is 1°C (1972). May is one of the most comfortable months to visit.
Jōetsu weather in June
In June, Jōetsu averages a high of 26°C and a low of 16°C. It gets 125 mm of precipitation over about 11 rainy days. Estimated sunshine is 32% of daylight hours, derived from ERA5 cloud cover. The June record high is 37°C (1978) and the record low is 8°C (1978). June is one of the most comfortable months to visit.
Jōetsu weather in July
In July, Jōetsu averages a high of 29°C and a low of 21°C. It gets 191 mm of precipitation over about 13 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The July record high is 38°C (2015) and the record low is 13°C (1979).
Jōetsu weather in August
In August, Jōetsu averages a high of 31°C and a low of 22°C. It gets 156 mm of precipitation over about 10 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The August record high is 41°C (2019) and the record low is 13°C (1971).
Jōetsu weather in September
In September, Jōetsu averages a high of 27°C and a low of 18°C. It gets 183 mm of precipitation over about 13 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The September record high is 39°C (2020) and the record low is 9°C (1976).
Jōetsu weather in October
In October, Jōetsu averages a high of 21°C and a low of 11°C. It gets 195 mm of precipitation over about 12 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The October record high is 34°C (2018) and the record low is 3°C (1970). October is one of the most comfortable months to visit.
Jōetsu weather in November
In November, Jōetsu averages a high of 16°C and a low of 6°C. It gets 297 mm of precipitation over about 16 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The November record high is 28°C (2020) and the record low is -2°C (2017).
Jōetsu weather in December
In December, Jōetsu averages a high of 9°C and a low of 2°C. It gets 436 mm of precipitation over about 21 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The December record high is 23°C (1982) and the record low is -7°C (1976).
Sunshine, humidity and wind in Jōetsu
April is the sunniest month in Jōetsu, with estimated sunshine of 41% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 24%. The annual cloud-cover estimate is 33% of daylight hours; it is not a measurement of sunshine duration. Jōetsu is cloudier than 89% of Japan.
Humidity peaks in July at 82% and is lowest in March at 70%.
Jōetsu has about 23 days a year above 32°C. Jōetsu is hotter than 61% of Japan.
First and last freeze in Jōetsu
The first fall freeze in Jōetsu typically comes around December 6, and the last spring freeze around March 31. That leaves a frost-free growing season of about 250 days.
Jōetsu weather records
These records cover TAKADA during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Jōetsu station is 41°C, on August 14, 2019. The coldest is -10°C, on February 17, 1978.
The wettest day in the available station history brought 176 mm of precipitation, on July 8, 1985.
38 all-time records have been set at the station since 1970.
The best time to visit Jōetsu
The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°C.
Winter (December–February) is chilly, with average highs around 7°C and lows near 0°C.
Spring (March–May) is mild, with average highs around 17°C and lows near 6°C.
Summer (June–August) is hot, with average highs around 29°C and lows near 20°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 21°C and lows near 12°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -1° | 6° | 405 mm | 23 | 78% | 24% | 18° | -9° |
| February | -1° | 7° | 243 mm | 19 | 74% | 29% | 22° | -10° |
| March | 1° | 11° | 173 mm | 17 | 70% | 35% | 29° | -7° |
| April | 6° | 18° | 92 mm | 12 | 70% | 41% | 32° | -4° |
| May | 11° | 23° | 77 mm | 9 | 72% | 37% | 33° | 1° |
| June | 16° | 26° | 125 mm | 11 | 76% | 32% | 37° | 8° |
| July | 21° | 29° | 191 mm | 13 | 82% | 29% | 38° | 13° |
| August | 22° | 31° | 156 mm | 10 | 76% | 36% | 41° | 13° |
| September | 18° | 27° | 183 mm | 13 | 78% | 33% | 39° | 9° |
| October | 11° | 21° | 195 mm | 12 | 74% | 35% | 34° | 3° |
| November | 6° | 16° | 297 mm | 16 | 74% | 39% | 28° | -2° |
| December | 2° | 9° | 436 mm | 21 | 80% | 26% | 23° | -7° |
Station: TAKADA, 6 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Jōetsu climate questions
How much rain does Jōetsu get?
Jōetsu gets 2575 mm of precipitation in an average year, over about 176 rainy days.
What is the wettest month in Jōetsu?
December is the wettest month in Jōetsu, with 436 mm. May is the driest, with 77 mm.
How many rainy days does Jōetsu have a year?
Jōetsu has about 176 days with measurable rain in an average year. January has the most, about 23.
What is the hottest month in Jōetsu?
August is the warmest month in Jōetsu, with an average high of 31°C.
What is the coldest month in Jōetsu?
January is the coldest month in Jōetsu, with an average low of -1°C.
What is the record high temperature in Jōetsu?
Within the available 1970–2026 station history, the record high at the Jōetsu station is 41°C, set on August 14, 2019. The record low is -10°C, on February 17, 1978.
What is the sunniest month in Jōetsu?
April is the sunniest month in Jōetsu, with estimated sunshine of 41% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in Jōetsu?
The first fall freeze in Jōetsu typically comes around December 6. The last spring freeze is around March 31.
What is the best time to visit Jōetsu?
The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°C.