76 winters, day by day
Zao Onsen Ski Resort, Japan. Every ski winter from 1950/51 to 2025/26.
Zao Onsen 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 29% of 736 resorts
+1.8°C+3.3°F
The trend: from -8°C18°F to -6°C21°F. Point at a winter to read it.
Snowfall at the summit
−14%
The trend: from 1.8 m71 in to 1.6 m61 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 2 to 1. Point at a winter to read it.
Days with a base at the summit
−24 days
The trend: from 97 to 73. Point at a winter to read it.
Days with fresh snow at the summit
−8 days
The trend: from 53 to 45. 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−8%
Then
1.7 m69 in
Now
1.6 m63 in
- Powder days at the summit±0 days
Then
2
Now
1
- Days with a base at the summit−15 days
Then
93
Now
78
- Average temperature at the summit+1.1°C+2.0°F
Then
-7°C19°F
Now
-6°C21°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
- 1950s1950/511.8 m70 in1951/521.7 m69 in1952/531.8 m71 in1953/541.2 m48 in1954/551.7 m65 in1955/563.0 m117 in1956/572.2 m85 in1957/581.6 m62 in1958/591.0 m40 in1959/601.5 m58 in
- 1960s1960/611.9 m74 in1961/621.8 m69 in1962/631.5 m60 in1963/642.0 m78 in1964/651.8 m70 in1965/661.8 m70 in1966/671.7 m69 in1967/681.5 m59 in1968/692.1 m84 in1969/701.7 m65 in
- 1970s1970/711.4 m54 in1971/721.3 m52 in1972/731.5 m58 in1973/742.4 m96 in1974/752.2 m87 in1975/761.5 m59 in1976/772.0 m78 in1977/782.1 m82 in1978/791.2 m49 in1979/801.5 m60 in
- 1980s1980/812.1 m81 in1981/821.2 m48 in1982/832.0 m79 in1983/842.3 m90 in1984/851.8 m70 in1985/862.1 m83 in1986/871.7 m69 in1987/881.7 m65 in1988/891.5 m58 in1989/9089 cm35 in
- 1990s1990/911.3 m52 in1991/921.7 m67 in1992/931.8 m72 in1993/941.3 m49 in1994/951.6 m62 in1995/961.8 m69 in1996/971.4 m56 in1997/981.9 m73 in1998/991.6 m61 in1999/001.5 m57 in
- 2000s2000/012.1 m84 in2001/021.4 m53 in2002/031.8 m70 in2003/041.3 m50 in2004/052.1 m83 in2005/061.8 m69 in2006/0791 cm36 in2007/081.2 m47 in2008/091.5 m58 in2009/101.9 m74 in
- 2010s2010/111.8 m69 in2011/122.1 m84 in2012/131.8 m72 in2013/142.5 m98 in2014/151.9 m74 in2015/161.4 m54 in2016/171.6 m63 in2017/181.6 m62 in2018/191.6 m64 in2019/201.1 m43 in
- 2020s2020/211.3 m52 in2021/221.7 m67 in2022/231.3 m50 in2023/241.7 m65 in2024/251.5 m60 in2025/261.2 m47 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