76 winters, day by day
Mt. Bachelor, United States. Every ski winter from 1950/51 to 2025/26.
Mt. Bachelor, 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 14% of 736 resorts
+1.5°C+2.7°F
The trend: from -8°C17°F to -7°C20°F. Point at a winter to read it.
Snowfall at the summit
−26%
The trend: from 5.4 m212 in to 4.0 m158 in. Point at a winter to read it.
Powder days at the summit
−8 days
The trend: from 16 to 8. Point at a winter to read it.
Days with a base at the summit
−23 days
The trend: from 156 to 133. Point at a winter to read it.
Days with fresh snow at the summit
−9 days
The trend: from 85 to 76. 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
5.2 m204 in
Now
4.5 m177 in
- Snowfall in the village−14%
Then
3.9 m153 in
Now
3.4 m132 in
- Powder days at the summit−4 days
Then
15
Now
11
- Days with a base at the summit−10 days
Then
149
Now
139
- Average temperature at the summit+0.9°C+1.6°F
Then
-8°C17°F
Now
-7°C19°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
- 1950s1950/516.4 m252 in1951/526.9 m273 in1952/535.8 m226 in1953/546.7 m263 in1954/555.2 m206 in1955/567.2 m283 in1956/574.1 m160 in1957/585.7 m223 in1958/594.5 m176 in1959/605.0 m197 in
- 1960s1960/615.2 m203 in1961/624.7 m187 in1962/633.7 m144 in1963/645.7 m224 in1964/655.1 m201 in1965/665.4 m211 in1966/675.2 m204 in1967/683.3 m128 in1968/695.6 m219 in1969/704.7 m187 in
- 1970s1970/716.3 m246 in1971/727.3 m286 in1972/733.4 m133 in1973/747.6 m301 in1974/755.8 m227 in1975/765.2 m206 in1976/772.0 m78 in1977/783.6 m142 in1978/794.1 m162 in1979/804.2 m164 in
- 1980s1980/812.7 m108 in1981/825.9 m231 in1982/835.2 m205 in1983/844.9 m194 in1984/854.6 m182 in1985/864.3 m169 in1986/873.8 m149 in1987/884.3 m167 in1988/895.5 m217 in1989/903.3 m130 in
- 1990s1990/913.2 m127 in1991/922.0 m80 in1992/934.7 m186 in1993/943.2 m126 in1994/955.0 m195 in1995/964.6 m183 in1996/975.1 m202 in1997/983.9 m154 in1998/997.0 m275 in1999/004.9 m193 in
- 2000s2000/012.8 m112 in2001/025.0 m196 in2002/034.1 m160 in2003/045.1 m201 in2004/052.9 m115 in2005/065.7 m224 in2006/074.6 m180 in2007/085.7 m223 in2008/095.1 m201 in2009/104.0 m158 in
- 2010s2010/115.7 m223 in2011/125.5 m215 in2012/134.1 m162 in2013/144.0 m156 in2014/152.3 m90 in2015/164.7 m186 in2016/175.7 m222 in2017/183.8 m148 in2018/194.2 m165 in2019/203.8 m150 in
- 2020s2020/214.5 m179 in2021/224.2 m163 in2022/234.9 m191 in2023/244.7 m183 in2024/255.4 m212 in2025/262.0 m77 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