Alta, 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 18% of 736 resorts
+1.6°C+2.8°F
The trend: from -11°C12°F to -9°C15°F. Point at a winter to read it.
Snowfall at the summit
−20%
The trend: from 2.6 m102 in to 2.1 m81 in. Point at a winter to read it.
Powder days at the summit
−1 day
The trend: from 3 to 2. Point at a winter to read it.
Days with a base at the summit
−12 days
The trend: from 157 to 145. Point at a winter to read it.
Days with fresh snow at the summit
−9 days
The trend: from 62 to 53. 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−13%
Then
2.5 m97 in
Now
2.1 m84 in
- Powder days at the summit−1 day
Then
2
Now
2
- Days with a base at the summit−4 days
Then
151
Now
147
- Average temperature at the summit+1.0°C+1.7°F
Then
-11°C13°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 m100 in1951/523.5 m139 in1952/532.7 m108 in1953/542.3 m89 in1954/552.2 m85 in1955/562.6 m100 in1956/572.5 m98 in1957/582.7 m108 in1958/592.4 m94 in1959/602.0 m78 in
- 1960s1960/611.7 m69 in1961/622.8 m110 in1962/632.1 m81 in1963/642.2 m87 in1964/652.8 m109 in1965/661.7 m68 in1966/672.6 m102 in1967/682.7 m106 in1968/693.0 m117 in1969/702.3 m89 in
- 1970s1970/712.5 m99 in1971/722.2 m86 in1972/732.6 m104 in1973/743.0 m117 in1974/752.7 m105 in1975/762.3 m89 in1976/771.0 m40 in1977/782.8 m111 in1978/792.7 m106 in1979/803.0 m119 in
- 1980s1980/811.8 m69 in1981/823.1 m123 in1982/833.2 m124 in1983/844.1 m162 in1984/852.3 m91 in1985/863.2 m125 in1986/871.5 m59 in1987/882.0 m77 in1988/892.6 m103 in1989/901.7 m69 in
- 1990s1990/912.4 m94 in1991/921.4 m53 in1992/933.0 m119 in1993/941.6 m64 in1994/952.5 m97 in1995/962.6 m101 in1996/972.9 m115 in1997/982.6 m100 in1998/992.2 m86 in1999/001.9 m74 in
- 2000s2000/011.7 m69 in2001/021.9 m75 in2002/031.6 m64 in2003/042.2 m87 in2004/052.1 m84 in2005/062.6 m102 in2006/071.6 m65 in2007/082.5 m98 in2008/092.7 m104 in2009/101.9 m74 in
- 2010s2010/113.4 m134 in2011/121.7 m65 in2012/131.9 m74 in2013/141.9 m74 in2014/151.4 m55 in2015/162.2 m88 in2016/173.0 m116 in2017/181.6 m61 in2018/192.6 m103 in2019/202.0 m80 in
- 2020s2020/211.6 m64 in2021/221.5 m59 in2022/233.6 m142 in2023/242.6 m100 in2024/251.9 m76 in2025/261.2 m46 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