76 winters, day by day
Praz de Lys Sommand, France. Every ski winter from 1950/51 to 2025/26.
Praz de Lys Sommand, France. 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.
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Climate change
Average winter temperature at the summit
Faster warming than 83% of 736 resorts
+2.8°C+5.0°F
The trend: from -7°C19°F to -4°C24°F. Point at a winter to read it.
Snowfall at the summit
−21%
The trend: from 2.4 m93 in to 1.8 m72 in. Point at a winter to read it.
Powder days at the summit
−1 day
The trend: from 4 to 3. Point at a winter to read it.
Days with a base at the summit
−32 days
The trend: from 139 to 107. Point at a winter to read it.
Days with fresh snow at the summit
−10 days
The trend: from 52 to 42. 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−15%
Then
2.2 m88 in
Now
1.9 m75 in
- Snowfall in the village−15%
Then
2.2 m88 in
Now
1.9 m75 in
- Powder days at the summit±0 days
Then
3
Now
3
- Days with a base at the summit−18 days
Then
134
Now
116
- Average temperature at the summit+1.6°C+2.8°F
Then
-7°C20°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
- 1950s1950/512.8 m109 in1951/522.2 m87 in1952/532.4 m96 in1953/541.6 m61 in1954/552.2 m85 in1955/561.4 m54 in1956/571.2 m47 in1957/582.7 m105 in1958/591.5 m58 in1959/602.0 m79 in
- 1960s1960/612.0 m79 in1961/622.1 m81 in1962/632.7 m106 in1963/6474 cm29 in1964/652.3 m89 in1965/663.1 m121 in1966/672.5 m99 in1967/682.9 m113 in1968/692.2 m87 in1969/704.0 m157 in
- 1970s1970/711.7 m66 in1971/722.0 m80 in1972/732.1 m83 in1973/741.8 m69 in1974/752.4 m95 in1975/761.7 m67 in1976/772.7 m108 in1977/783.5 m137 in1978/792.1 m83 in1979/802.7 m105 in
- 1980s1980/812.9 m115 in1981/823.0 m119 in1982/832.9 m113 in1983/842.8 m109 in1984/852.3 m91 in1985/862.5 m99 in1986/872.3 m89 in1987/882.4 m95 in1988/891.9 m75 in1989/901.1 m42 in
- 1990s1990/911.9 m76 in1991/921.7 m66 in1992/931.1 m43 in1993/942.4 m94 in1994/952.7 m105 in1995/961.2 m49 in1996/971.8 m70 in1997/981.8 m70 in1998/993.2 m127 in1999/002.2 m86 in
- 2000s2000/012.0 m78 in2001/021.2 m48 in2002/031.7 m65 in2003/042.1 m84 in2004/052.2 m87 in2005/062.1 m81 in2006/071.2 m48 in2007/082.1 m81 in2008/092.4 m93 in2009/101.9 m75 in
- 2010s2010/111.4 m55 in2011/122.1 m81 in2012/132.9 m115 in2013/142.0 m80 in2014/152.0 m78 in2015/162.3 m90 in2016/171.3 m52 in2017/182.5 m98 in2018/191.9 m75 in2019/201.7 m67 in
- 2020s2020/212.1 m83 in2021/221.8 m70 in2022/2399 cm39 in2023/241.5 m57 in2024/251.3 m51 in2025/261.7 m69 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