76 winters, day by day
Boyne Mountain, United States. Every ski winter from 1950/51 to 2025/26.
Boyne 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 59% of 736 resorts
+2.2°C+4.0°F
The trend: from -4°C25°F to -2°C29°F. Point at a winter to read it.
Snowfall at the summit
+5%
The trend: from 1.5 m60 in to 1.6 m63 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 1 to 1. Point at a winter to read it.
Days with a base at the summit
−32 days
The trend: from 80 to 47. Point at a winter to read it.
Days with fresh snow at the summit
+4 days
The trend: from 47 to 51. 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−1%
Then
1.6 m63 in
Now
1.6 m62 in
- Powder days at the summit±0 days
Then
1
Now
1
- Days with a base at the summit−20 days
Then
74
Now
53
- Average temperature at the summit+1.6°C+2.8°F
Then
-4°C25°F
Now
-2°C28°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
- 1950s1950/511.9 m74 in1951/521.8 m72 in1952/531.6 m65 in1953/541.3 m50 in1954/551.2 m48 in1955/561.8 m70 in1956/571.4 m55 in1957/581.3 m52 in1958/592.0 m80 in1959/601.8 m69 in
- 1960s1960/611.2 m46 in1961/621.8 m69 in1962/631.5 m57 in1963/641.5 m59 in1964/651.4 m57 in1965/661.2 m47 in1966/671.9 m74 in1967/681.2 m48 in1968/691.5 m57 in1969/701.4 m55 in
- 1970s1970/711.9 m76 in1971/721.8 m72 in1972/731.4 m53 in1973/741.6 m61 in1974/751.8 m70 in1975/761.7 m68 in1976/771.9 m76 in1977/781.8 m70 in1978/792.0 m78 in1979/801.3 m51 in
- 1980s1980/811.2 m47 in1981/821.5 m59 in1982/831.1 m45 in1983/841.5 m57 in1984/852.1 m82 in1985/861.6 m65 in1986/871.2 m47 in1987/881.9 m73 in1988/891.5 m60 in1989/901.8 m70 in
- 1990s1990/911.5 m59 in1991/921.6 m62 in1992/931.6 m63 in1993/941.3 m51 in1994/951.2 m47 in1995/962.0 m78 in1996/972.1 m82 in1997/981.3 m52 in1998/991.4 m54 in1999/0087 cm34 in
- 2000s2000/011.4 m55 in2001/021.7 m65 in2002/031.1 m45 in2003/041.4 m57 in2004/051.4 m54 in2005/061.7 m67 in2006/071.2 m49 in2007/081.7 m69 in2008/092.0 m79 in2009/1087 cm34 in
- 2010s2010/111.2 m48 in2011/121.2 m48 in2012/131.7 m69 in2013/141.8 m69 in2014/151.6 m63 in2015/161.7 m68 in2016/171.8 m70 in2017/181.9 m74 in2018/192.0 m78 in2019/201.8 m69 in
- 2020s2020/211.1 m44 in2021/221.6 m63 in2022/231.9 m75 in2023/241.2 m46 in2024/252.1 m84 in2025/262.3 m92 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