76 winters, day by day
Itoigawa Seaside Valley Ski Resort, Japan. Every ski winter from 1950/51 to 2025/26.
Itoigawa Seaside Valley Ski Resort, Japan. Every ski winter from 1950/51 to 2025/26.
Every day of every winter
Each row is a winter, oldest at the top. Each column is a day, from the start of the season to the end. The darker the blue, the more snow fell that day.
Loading the daily snowfall…
Climate change
Average winter temperature at the summit
Faster warming than 12% of 736 resorts
+1.4°C+2.5°F
The trend: from 1°C34°F to 2°C36°F. Point at a winter to read it.
Snowfall at the summit
−8%
The trend: from 4.2 m165 in to 3.9 m152 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 13 to 13. Point at a winter to read it.
Days with a base at the summit
−16 days
The trend: from 141 to 125. Point at a winter to read it.
Days with a base in the village
−10 days
The trend: from 113 to 103. Point at a winter to read it.
Each dot is one winter. The curve is a running average over about ten winters; the dotted line is the straight trend through all of them, and the changes above are measured along it. One winter is weather; the trend is climate.
Then and now
Then 1950/51–1979/80Now 1996/97–2025/26
- Snowfall at the summit−3%
Then
4.1 m161 in
Now
4.0 m157 in
- Snowfall in the village−11%
Then
2.2 m88 in
Now
2.0 m78 in
- Powder days at the summit±0 days
Then
13
Now
13
- Days with a base at the summit−9 days
Then
136
Now
127
- Days with a base in the village−5 days
Then
110
Now
105
- Average temperature at the summit+0.8°C+1.4°F
Then
1°C34°F
Now
2°C36°F
Averages per winter over the first and last 30 winters. A powder day brings 10 cm4 in or more of new snow; a base is 30 cm12 in or more on the ground.
Records
All winters
- 1950s1950/514.3 m167 in1951/525.5 m217 in1952/535.2 m206 in1953/543.4 m133 in1954/555.0 m196 in1955/565.1 m201 in1956/575.7 m222 in1957/582.9 m114 in1958/592.0 m78 in1959/604.0 m156 in
- 1960s1960/613.9 m155 in1961/623.7 m147 in1962/633.1 m122 in1963/643.3 m129 in1964/654.6 m181 in1965/664.2 m163 in1966/674.3 m168 in1967/684.2 m164 in1968/693.4 m135 in1969/705.1 m199 in
- 1970s1970/714.2 m167 in1971/722.6 m104 in1972/733.6 m141 in1973/745.1 m199 in1974/755.0 m197 in1975/763.7 m147 in1976/774.8 m189 in1977/784.6 m180 in1978/792.4 m96 in1979/804.2 m165 in
- 1980s1980/814.9 m194 in1981/824.2 m167 in1982/834.0 m158 in1983/845.9 m234 in1984/854.0 m156 in1985/864.7 m185 in1986/874.0 m157 in1987/884.1 m161 in1988/892.5 m100 in1989/902.4 m94 in
- 1990s1990/913.8 m151 in1991/923.0 m119 in1992/933.6 m140 in1993/944.1 m162 in1994/954.0 m158 in1995/964.9 m194 in1996/973.4 m133 in1997/983.2 m127 in1998/993.9 m155 in1999/004.3 m169 in
- 2000s2000/015.3 m207 in2001/023.8 m150 in2002/034.3 m169 in2003/043.6 m140 in2004/054.8 m189 in2005/065.5 m217 in2006/072.2 m86 in2007/084.2 m164 in2008/093.0 m120 in2009/104.0 m156 in
- 2010s2010/114.8 m188 in2011/125.7 m223 in2012/134.7 m183 in2013/144.5 m175 in2014/155.1 m201 in2015/162.6 m102 in2016/174.2 m164 in2017/184.3 m171 in2018/194.4 m174 in2019/201.8 m69 in
- 2020s2020/213.6 m142 in2021/224.6 m181 in2022/233.3 m129 in2023/242.9 m115 in2024/254.5 m175 in2025/263.4 m132 in
Modelled weather from ERA5 and ERA5-Land, not measured on the slopes. Snow depth is the average over a grid cell about 9 km wide, so it can differ a lot from what the piste report says. How SnowOdds works