76 winters, day by day
Ski Cooper, United States. Every ski winter from 1950/51 to 2025/26.
Ski Cooper, United States. 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 23% of 736 resorts
+1.7°C+3.0°F
The trend: from -11°C12°F to -10°C15°F. Point at a winter to read it.
Snowfall at the summit
−9%
The trend: from 2.3 m89 in to 2.1 m81 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 1 to 2. Point at a winter to read it.
Days with a base at the summit
−5 days
The trend: from 152 to 147. Point at a winter to read it.
Days with fresh snow at the summit
−7 days
The trend: from 63 to 56. 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−6%
Then
2.2 m85 in
Now
2.0 m80 in
- Snowfall in the village−7%
Then
2.1 m82 in
Now
1.9 m76 in
- Powder days at the summit±0 days
Then
1
Now
1
- Days with a base at the summit−1 day
Then
149
Now
148
- Average temperature at the summit+1.1°C+2.0°F
Then
-11°C12°F
Now
-10°C14°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
- 1950s1950/512.6 m101 in1951/522.9 m115 in1952/532.1 m83 in1953/541.8 m70 in1954/551.8 m71 in1955/562.5 m99 in1956/572.8 m111 in1957/582.3 m89 in1958/592.2 m88 in1959/601.9 m75 in
- 1960s1960/611.9 m76 in1961/622.5 m98 in1962/631.7 m67 in1963/641.9 m74 in1964/652.9 m116 in1965/661.5 m58 in1966/671.9 m76 in1967/682.1 m82 in1968/691.9 m76 in1969/702.1 m84 in
- 1970s1970/712.0 m78 in1971/721.8 m72 in1972/732.2 m85 in1973/742.3 m90 in1974/752.5 m100 in1975/762.0 m80 in1976/771.4 m56 in1977/782.3 m92 in1978/792.4 m93 in1979/802.8 m111 in
- 1980s1980/811.3 m51 in1981/822.5 m100 in1982/832.2 m87 in1983/843.4 m133 in1984/852.4 m93 in1985/862.6 m100 in1986/872.2 m86 in1987/882.2 m86 in1988/892.4 m95 in1989/902.5 m97 in
- 1990s1990/912.2 m85 in1991/921.8 m70 in1992/932.3 m90 in1993/942.0 m77 in1994/952.6 m102 in1995/962.6 m102 in1996/972.6 m100 in1997/981.9 m75 in1998/992.3 m89 in1999/001.9 m73 in
- 2000s2000/011.7 m69 in2001/021.2 m48 in2002/031.9 m76 in2003/042.0 m79 in2004/052.1 m84 in2005/062.0 m80 in2006/071.9 m76 in2007/082.5 m100 in2008/092.3 m90 in2009/101.9 m76 in
- 2010s2010/112.5 m97 in2011/121.2 m48 in2012/132.0 m78 in2013/142.5 m98 in2014/151.9 m76 in2015/162.3 m91 in2016/172.5 m99 in2017/181.9 m73 in2018/192.5 m98 in2019/202.0 m78 in
- 2020s2020/211.9 m76 in2021/222.1 m81 in2022/232.2 m88 in2023/242.1 m84 in2024/251.9 m74 in2025/261.5 m59 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