76 winters, day by day
Sun Valley - Bald Mountain, United States. Every ski winter from 1950/51 to 2025/26.
Sun Valley - Bald Mountain, 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.
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Climate change
Average winter temperature at the summit
Faster warming than 13% of 736 resorts
+1.5°C+2.6°F
The trend: from -11°C13°F to -9°C15°F. Point at a winter to read it.
Snowfall at the summit
−24%
The trend: from 3.2 m126 in to 2.4 m96 in. Point at a winter to read it.
Powder days at the summit
−3 days
The trend: from 7 to 4. Point at a winter to read it.
Days with a base at the summit
−18 days
The trend: from 149 to 132. 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−14%
Then
3.1 m121 in
Now
2.6 m104 in
- Snowfall in the village−20%
Then
2.0 m77 in
Now
1.6 m62 in
- Powder days at the summit−2 days
Then
6
Now
5
- Days with a base at the summit−8 days
Then
145
Now
137
- Average temperature at the summit+0.9°C+1.5°F
Then
-10°C13°F
Now
-10°C15°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
- 1950s1950/513.6 m141 in1951/523.6 m140 in1952/533.8 m150 in1953/543.9 m154 in1954/552.4 m94 in1955/563.8 m150 in1956/572.7 m107 in1957/583.5 m138 in1958/592.5 m99 in1959/602.3 m89 in
- 1960s1960/612.5 m100 in1961/623.0 m117 in1962/632.9 m112 in1963/642.7 m106 in1964/654.6 m183 in1965/662.3 m92 in1966/673.7 m144 in1967/682.0 m79 in1968/693.7 m146 in1969/703.2 m125 in
- 1970s1970/713.9 m152 in1971/723.3 m131 in1972/732.4 m94 in1973/744.4 m172 in1974/753.6 m143 in1975/762.9 m113 in1976/7781 cm32 in1977/783.4 m135 in1978/792.2 m85 in1979/802.9 m113 in
- 1980s1980/812.3 m89 in1981/824.1 m163 in1982/833.9 m155 in1983/843.1 m122 in1984/852.4 m94 in1985/863.5 m137 in1986/871.6 m62 in1987/882.1 m81 in1988/892.9 m115 in1989/901.8 m70 in
- 1990s1990/911.9 m74 in1991/921.5 m57 in1992/933.1 m124 in1993/941.6 m64 in1994/953.8 m150 in1995/963.5 m137 in1996/974.1 m159 in1997/982.4 m94 in1998/993.8 m148 in1999/002.2 m87 in
- 2000s2000/011.4 m55 in2001/022.4 m93 in2002/032.7 m107 in2003/042.2 m88 in2004/051.9 m75 in2005/064.2 m165 in2006/072.4 m94 in2007/082.5 m100 in2008/092.6 m104 in2009/101.7 m69 in
- 2010s2010/113.3 m131 in2011/122.9 m112 in2012/132.2 m88 in2013/142.5 m97 in2014/151.8 m72 in2015/163.0 m117 in2016/174.2 m166 in2017/182.7 m104 in2018/193.2 m126 in2019/201.8 m72 in
- 2020s2020/212.0 m79 in2021/222.0 m80 in2022/233.3 m129 in2023/242.3 m92 in2024/252.9 m114 in2025/262.6 m103 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