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Has the climate in Mount Vernon changed?
Mount Vernon has warmed about 1.7°F between 2002 and 2012.
About 1.5°F per decade, measured from Mount Vernon's official daily weather records, 2002–2012. 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.
Mount Vernon's temperature, year by year
Average temperature for each year from 2002 to 2012.
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.
Methodology & sources
Temperature — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Laguardia AP (NOAA GHCN station USW00014732), about 15 km from the city centre.