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Has the climate in Mammoth Lakes changed?
Mammoth Lakes has warmed about 2.9°F between 1994 and 2018.
About 1.2°F per decade, measured from Mammoth Lakes's official daily weather records, 1994–2018. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.
What has actually changed
Each card compares the 1970s (the first ten years of the record) with recent years (the last ten) — the same span the headline and the chart use.
Mammoth Lakes's temperature, year by year
Average temperature for each year from 1994 to 2018.
Each bar is one year. Most recent years sit above the older ones. Some recent years still came in cool — warming is a slope, not a straight climb.
In day-to-day terms, that long-term shift shows up as about 5 fewer freezing nights a year compared with the 1970s.
Methodology & sources
Temperature — 1991–2020 normals computed from 24 years of daily observations at Mammoth Lakes RS, a weather station, inside the city. The underlying daily records come from NOAA's global station network.