Les Mosses, Switzerland. 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 58% of 736 resorts
+2.2°C+4.0°F
The trend: from -7°C20°F to -5°C24°F. Point at a winter to read it.
Snowfall at the summit
−18%
The trend: from 3.1 m121 in to 2.5 m100 in. Point at a winter to read it.
Powder days at the summit
−1 day
The trend: from 6 to 6. Point at a winter to read it.
Days with a base at the summit
−7 days
The trend: from 155 to 148. Point at a winter to read it.
Days with fresh snow at the summit
−11 days
The trend: from 60 to 49. 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−11%
Then
2.9 m116 in
Now
2.6 m102 in
- Snowfall in the village−13%
Then
2.7 m108 in
Now
2.4 m95 in
- Powder days at the summit±0 days
Then
6
Now
6
- Days with a base at the summit−4 days
Then
155
Now
151
- Average temperature at the summit+1.2°C+2.2°F
Then
-6°C21°F
Now
-5°C23°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
- 1950s1950/513.3 m128 in1951/523.0 m117 in1952/533.4 m135 in1953/542.3 m89 in1954/552.7 m106 in1955/561.9 m73 in1956/571.5 m60 in1957/583.5 m139 in1958/592.0 m77 in1959/602.7 m106 in
- 1960s1960/612.5 m96 in1961/622.9 m116 in1962/633.2 m127 in1963/641.2 m46 in1964/653.1 m122 in1965/664.0 m156 in1966/673.5 m137 in1967/683.8 m148 in1968/693.0 m118 in1969/705.2 m204 in
- 1970s1970/712.1 m84 in1971/722.4 m93 in1972/733.1 m123 in1973/742.5 m98 in1974/753.5 m137 in1975/762.1 m81 in1976/773.4 m135 in1977/784.1 m160 in1978/792.8 m110 in1979/803.8 m151 in
- 1980s1980/813.8 m151 in1981/824.1 m163 in1982/833.5 m137 in1983/843.6 m141 in1984/852.8 m111 in1985/863.3 m128 in1986/873.3 m128 in1987/883.6 m143 in1988/892.5 m98 in1989/901.6 m61 in
- 1990s1990/912.3 m89 in1991/922.6 m100 in1992/931.8 m71 in1993/943.0 m117 in1994/953.6 m143 in1995/961.7 m65 in1996/972.4 m95 in1997/982.6 m104 in1998/994.2 m166 in1999/003.3 m128 in
- 2000s2000/012.9 m115 in2001/021.9 m73 in2002/032.4 m94 in2003/042.9 m113 in2004/052.9 m115 in2005/062.5 m100 in2006/071.8 m70 in2007/082.9 m113 in2008/093.2 m126 in2009/102.2 m87 in
- 2010s2010/111.8 m72 in2011/123.1 m122 in2012/133.8 m150 in2013/142.5 m99 in2014/152.5 m98 in2015/163.0 m118 in2016/171.9 m73 in2017/183.3 m128 in2018/192.8 m108 in2019/202.4 m94 in
- 2020s2020/212.8 m108 in2021/222.4 m95 in2022/231.4 m54 in2023/242.3 m89 in2024/251.9 m76 in2025/262.2 m88 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