About 0.3°F per decade, measured from York's official daily weather records, 1971–2025. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.
Is that a lot? York's climate has warmed more slowly than most other cities in United States.
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.
Freezing nights
1 more night
1970s
112 / yr
→
Recent
113 / yr
Colder winters — more frosts
Average temperature
+1.0°F
1970s
51.9°F
→
Recent
52.9°F
A steady upward drift
Hot days above 90°F
3 fewer days
1970s
18 / yr
→
Recent
15 / yr
Slightly fewer hot days
Rainy days
27 more days
1970s
106 / yr
→
Recent
133 / yr
Wetter on average
York's temperature, year by year
Average temperature for each year from 1971 to 2025.
a warmer-than-average year a cooler-than-average year
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.
When in the year the change shows up
How much warmer each month is now than in the 1970s.
Useful if you garden or care about a particular season —
otherwise the headline above already has the answer.
September has warmed the most — about 1.4°F. The warming runs across the whole year, not just one season.
Methodology & sources
Temperature — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Lebanon 2 W (NOAA GHCN station USC00364896), about 47 km from the city centre.