76 winters, day by day
Fortress Mountain Resort, Canada. Every ski winter from 1950/51 to 2025/26.
Fortress Mountain Resort, Canada. 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 12% of 736 resorts
+1.4°C+2.5°F
The trend: from -12°C10°F to -11°C13°F. Point at a winter to read it.
Snowfall at the summit
−17%
The trend: from 2.5 m97 in to 2.0 m80 in. Point at a winter to read it.
Powder days at the summit
−1 day
The trend: from 2 to 1. Point at a winter to read it.
Days with a base at the summit
−1 day
The trend: from 167 to 167. Point at a winter to read it.
Days with fresh snow at the summit
−9 days
The trend: from 68 to 59. 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
2.5 m97 in
Now
2.2 m85 in
- Snowfall in the village−15%
Then
2.3 m92 in
Now
2.0 m78 in
- Powder days at the summit−1 day
Then
2
Now
2
- Days with a base at the summit−3 days
Then
169
Now
166
- Average temperature at the summit+0.9°C+1.6°F
Then
-12°C10°F
Now
-11°C12°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
- 1950s1950/512.4 m93 in1951/521.6 m63 in1952/532.9 m114 in1953/543.8 m148 in1954/552.2 m85 in1955/562.6 m104 in1956/572.2 m85 in1957/582.4 m93 in1958/592.6 m103 in1959/602.3 m89 in
- 1960s1960/612.5 m100 in1961/622.0 m78 in1962/632.2 m88 in1963/642.7 m106 in1964/652.5 m98 in1965/662.6 m103 in1966/673.4 m132 in1967/682.7 m106 in1968/692.3 m91 in1969/702.3 m89 in
- 1970s1970/713.3 m130 in1971/723.4 m135 in1972/732.4 m94 in1973/742.9 m115 in1974/752.2 m85 in1975/762.6 m102 in1976/771.4 m56 in1977/782.0 m79 in1978/792.1 m81 in1979/802.0 m79 in
- 1980s1980/812.0 m77 in1981/822.3 m89 in1982/832.1 m81 in1983/841.7 m66 in1984/851.8 m72 in1985/861.5 m61 in1986/871.8 m69 in1987/882.1 m81 in1988/892.0 m80 in1989/902.5 m98 in
- 1990s1990/912.6 m100 in1991/921.5 m60 in1992/931.6 m64 in1993/942.1 m81 in1994/952.0 m77 in1995/962.5 m97 in1996/972.3 m92 in1997/981.7 m67 in1998/992.5 m98 in1999/002.2 m87 in
- 2000s2000/011.5 m59 in2001/022.5 m97 in2002/031.9 m73 in2003/041.6 m64 in2004/051.6 m61 in2005/061.8 m71 in2006/072.6 m101 in2007/081.9 m76 in2008/092.1 m81 in2009/101.8 m71 in
- 2010s2010/112.6 m104 in2011/122.8 m108 in2012/132.4 m94 in2013/142.5 m100 in2014/152.1 m81 in2015/161.9 m73 in2016/172.4 m94 in2017/182.5 m98 in2018/191.7 m66 in2019/202.4 m95 in
- 2020s2020/212.1 m82 in2021/222.5 m97 in2022/231.8 m72 in2023/242.4 m94 in2024/252.0 m78 in2025/262.9 m116 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