76 winters, day by day
Mount Sunapee, United States. Every ski winter from 1950/51 to 2025/26.
Mount Sunapee, 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 39% of 736 resorts
+2.0°C+3.5°F
The trend: from -6°C22°F to -4°C25°F. Point at a winter to read it.
Snowfall at the summit
−21%
The trend: from 1.8 m72 in to 1.5 m57 in. Point at a winter to read it.
Powder days at the summit
−1 day
The trend: from 5 to 4. Point at a winter to read it.
Days with a base at the summit
−46 days
The trend: from 74 to 28. Point at a winter to read it.
Days with fresh snow at the summit
−6 days
The trend: from 33 to 27. 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
1.8 m71 in
Now
1.6 m62 in
- Snowfall in the village−13%
Then
1.8 m71 in
Now
1.6 m62 in
- Powder days at the summit−1 day
Then
5
Now
4
- Days with a base at the summit−32 days
Then
70
Now
39
- Average temperature at the summit+1.3°C+2.4°F
Then
-5°C22°F
Now
-4°C25°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
- 1950s1950/511.7 m67 in1951/522.4 m93 in1952/531.6 m61 in1953/541.4 m56 in1954/551.3 m52 in1955/562.4 m93 in1956/571.7 m65 in1957/582.8 m111 in1958/591.6 m61 in1959/602.0 m77 in
- 1960s1960/611.8 m69 in1961/621.9 m76 in1962/631.9 m76 in1963/641.6 m62 in1964/651.2 m48 in1965/661.7 m65 in1966/672.0 m77 in1967/681.7 m67 in1968/692.8 m109 in1969/701.6 m61 in
- 1970s1970/712.2 m85 in1971/722.4 m93 in1972/731.8 m71 in1973/741.3 m49 in1974/752.0 m79 in1975/761.8 m70 in1976/771.6 m63 in1977/781.9 m74 in1978/791.9 m75 in1979/8068 cm27 in
- 1980s1980/811.4 m54 in1981/821.9 m74 in1982/831.4 m55 in1983/841.7 m68 in1984/851.3 m51 in1985/861.4 m53 in1986/872.3 m92 in1987/881.5 m57 in1988/8992 cm36 in1989/901.2 m47 in
- 1990s1990/911.0 m40 in1991/9294 cm37 in1992/932.1 m82 in1993/941.8 m70 in1994/951.0 m41 in1995/962.0 m78 in1996/972.1 m84 in1997/981.9 m75 in1998/991.2 m46 in1999/001.1 m43 in
- 2000s2000/012.3 m89 in2001/021.2 m46 in2002/032.0 m80 in2003/041.4 m55 in2004/051.6 m63 in2005/0694 cm37 in2006/071.8 m70 in2007/082.1 m82 in2008/091.6 m63 in2009/101.7 m67 in
- 2010s2010/111.7 m68 in2011/1292 cm36 in2012/131.6 m64 in2013/141.6 m63 in2014/151.9 m74 in2015/1664 cm25 in2016/171.9 m73 in2017/181.6 m62 in2018/191.7 m68 in2019/201.8 m70 in
- 2020s2020/211.4 m54 in2021/221.3 m50 in2022/232.0 m79 in2023/241.7 m67 in2024/251.4 m54 in2025/261.2 m47 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