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Has the climate in Fairfax changed?
Fairfax has warmed about 1.5°F between 2003 and 2020.
About 0.8°F per decade, measured from Fairfax's official daily weather records, 2003–2020. 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.
Fairfax's temperature, year by year
Average temperature for each year from 2003 to 2020.
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 Oxon Hill (NOAA GHCN station USC00186800), about 28 km from the city centre.