About 0.4°F per decade, measured from Bangor'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? Bangor's warming is broadly in line with other cities in United States — neither unusually fast nor unusually slow.
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
153 / yr
→
Recent
154 / yr
Colder winters — more frosts
Average temperature
+1.4°F
1970s
44.3°F
→
Recent
45.7°F
A steady upward drift
Hot days above 90°F
1 more day
1970s
4 / yr
→
Recent
5 / yr
More days of serious heat
Rainy days
8 more days
1970s
129 / yr
→
Recent
137 / yr
Wetter on average
Bangor'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.
In day-to-day terms, that long-term shift shows up as about 5 more freezing nights a year compared with the 1970s.
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.
December has warmed the most — about 1.7°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 Bangor Intl AP (NOAA GHCN station USW00014606), about 4 km from the city centre.