76 winters, day by day
Okemo Mountain, United States. Every ski winter from 1950/51 to 2025/26.
Okemo 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 34% of 736 resorts
+1.9°C+3.4°F
The trend: from -7°C19°F to -5°C22°F. Point at a winter to read it.
Snowfall at the summit
−17%
The trend: from 2.1 m81 in to 1.7 m67 in. Point at a winter to read it.
Powder days at the summit
±0 days
The trend: from 4 to 4. Point at a winter to read it.
Days with a base at the summit
−51 days
The trend: from 94 to 43. Point at a winter to read it.
Days with fresh snow at the summit
−6 days
The trend: from 40 to 34. 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−10%
Then
2.0 m80 in
Now
1.8 m72 in
- Snowfall in the village−15%
Then
1.4 m56 in
Now
1.2 m48 in
- Powder days at the summit±0 days
Then
4
Now
5
- Days with a base at the summit−32 days
Then
91
Now
59
- Average temperature at the summit+1.3°C+2.3°F
Then
-7°C20°F
Now
-6°C22°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
- 1950s1950/512.2 m86 in1951/522.4 m96 in1952/532.0 m78 in1953/541.8 m70 in1954/551.9 m75 in1955/562.5 m96 in1956/571.7 m67 in1957/582.9 m114 in1958/591.9 m75 in1959/602.1 m84 in
- 1960s1960/611.7 m65 in1961/621.9 m75 in1962/632.4 m93 in1963/641.6 m64 in1964/651.4 m56 in1965/661.8 m69 in1966/671.9 m73 in1967/681.7 m65 in1968/692.7 m107 in1969/702.1 m82 in
- 1970s1970/712.4 m94 in1971/722.7 m105 in1972/732.3 m89 in1973/741.8 m72 in1974/752.3 m92 in1975/762.1 m82 in1976/772.0 m80 in1977/782.2 m85 in1978/792.1 m84 in1979/8094 cm37 in
- 1980s1980/811.5 m59 in1981/822.0 m78 in1982/831.4 m56 in1983/842.1 m84 in1984/851.7 m66 in1985/861.7 m65 in1986/872.1 m82 in1987/881.5 m61 in1988/891.3 m50 in1989/901.5 m58 in
- 1990s1990/911.3 m52 in1991/921.2 m47 in1992/932.2 m88 in1993/942.1 m83 in1994/951.2 m48 in1995/962.1 m84 in1996/972.7 m106 in1997/982.1 m83 in1998/991.7 m65 in1999/001.5 m58 in
- 2000s2000/012.4 m93 in2001/021.6 m61 in2002/032.4 m96 in2003/041.7 m69 in2004/051.6 m61 in2005/061.2 m48 in2006/072.2 m87 in2007/082.4 m93 in2008/091.8 m71 in2009/101.9 m74 in
- 2010s2010/112.1 m82 in2011/121.2 m46 in2012/131.5 m58 in2013/141.9 m74 in2014/152.1 m84 in2015/1674 cm29 in2016/171.9 m76 in2017/181.8 m71 in2018/192.3 m89 in2019/202.0 m80 in
- 2020s2020/211.5 m59 in2021/221.6 m65 in2022/232.1 m83 in2023/242.2 m87 in2024/251.7 m67 in2025/261.4 m55 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