76 winters, day by day
Copper Mountain, United States. Every ski winter from 1950/51 to 2025/26.
Copper 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.
Loading the daily snowfall…
Climate change
Average winter temperature at the summit
Faster warming than 32% of 736 resorts
+1.9°C+3.4°F
The trend: from -13°C9°F to -11°C12°F. Point at a winter to read it.
Snowfall at the summit
−7%
The trend: from 2.8 m111 in to 2.6 m102 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 2 to 2. Point at a winter to read it.
Days with a base at the summit
−4 days
The trend: from 153 to 149. Point at a winter to read it.
Days with fresh snow at the summit
−7 days
The trend: from 75 to 68. 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−5%
Then
2.7 m107 in
Now
2.6 m102 in
- Snowfall in the village−7%
Then
2.5 m97 in
Now
2.3 m90 in
- Powder days at the summit±0 days
Then
2
Now
2
- Days with a base at the summit−1 day
Then
150
Now
149
- Average temperature at the summit+1.2°C+2.1°F
Then
-13°C9°F
Now
-12°C11°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 m131 in1951/523.6 m143 in1952/532.6 m103 in1953/542.3 m92 in1954/552.3 m89 in1955/563.1 m120 in1956/573.3 m131 in1957/583.0 m116 in1958/592.9 m113 in1959/602.5 m97 in
- 1960s1960/612.4 m96 in1961/623.1 m120 in1962/632.2 m85 in1963/642.4 m93 in1964/653.4 m132 in1965/661.7 m69 in1966/672.5 m99 in1967/682.5 m99 in1968/692.6 m100 in1969/702.7 m107 in
- 1970s1970/712.6 m104 in1971/722.5 m98 in1972/732.6 m101 in1973/743.0 m118 in1974/753.0 m119 in1975/762.6 m102 in1976/771.9 m73 in1977/783.3 m128 in1978/792.9 m113 in1979/803.3 m131 in
- 1980s1980/811.7 m68 in1981/823.2 m126 in1982/832.9 m114 in1983/844.1 m163 in1984/852.8 m110 in1985/863.3 m129 in1986/872.5 m98 in1987/882.8 m108 in1988/893.1 m121 in1989/903.2 m124 in
- 1990s1990/912.7 m106 in1991/922.4 m93 in1992/933.0 m118 in1993/942.5 m96 in1994/953.0 m118 in1995/963.2 m126 in1996/973.2 m124 in1997/982.3 m90 in1998/992.7 m106 in1999/002.4 m94 in
- 2000s2000/012.3 m89 in2001/021.7 m67 in2002/032.6 m102 in2003/042.5 m97 in2004/052.6 m101 in2005/062.7 m106 in2006/072.5 m97 in2007/083.1 m120 in2008/093.0 m117 in2009/102.5 m98 in
- 2010s2010/113.2 m124 in2011/121.6 m65 in2012/132.5 m97 in2013/143.2 m125 in2014/152.3 m91 in2015/163.0 m118 in2016/173.0 m119 in2017/182.5 m97 in2018/193.1 m123 in2019/202.5 m99 in
- 2020s2020/212.3 m92 in2021/222.7 m105 in2022/232.9 m115 in2023/242.8 m112 in2024/252.4 m96 in2025/261.9 m73 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