Cooling and heating: Cities and FUAs … heating growth rate Cities in Portland

Portland: Cooling and heating: Cities and FUAs … heating growth rate Cities was -72.66 % change on previous year in 2025. ◆ Volatile

Latest (2025)
-72.66 % change on previous year
Change on year
down 616.1%
Rank
997th
of 1306 regions
All-time high
140.39 % change on previous year
in 1955
All-time low
-72.66 % change on previous year
in 2025
Years of data
75
1951–2025

Cooling and heating degree days - Cities and FUAs — Cooling degree in Portland, 1951–2025

-50050100150195119882025

Source: Statizoid (derived). Measured in % change on previous year.

Analysis

Portland recorded -72.66 % change on previous year for cooling and heating degree days - cities and fuas — cooling degree in 2025. That is the lowest value across all 75 years on record.

That represents a change of down 616.1% on the previous year and down 376.7% over ten years.

Over the whole period, cooling and heating degree days - cities and fuas — cooling degree in Portland peaked at 140.39 % change on previous year in 1955 and was at its lowest, -72.66 % change on previous year, in 2025.

Portland ranks 997th of 1306 regions on this measure, in the bottom quarter.

The series is highly variable year to year, so single readings are best treated with caution.

Cooling and heating: Cities and FUAs … heating growth rate Cities in Portland, year by year

Annual values for Cooling and heating degree days - Cities and FUAs — Cooling degree days, annual growth rate in Portland, 1951 to 2025.
Year % change on previous year Change
1951 10.78 % change on previous year —
1952 22.49 % change on previous year +108.6%
1953 -38.76 % change on previous year -272.4%
1954 -63.4 % change on previous year +63.5%
1955 140.39 % change on previous year -321.4%
1956 65.74 % change on previous year -53.2%
1957 -39.12 % change on previous year -159.5%
1958 135.65 % change on previous year -446.8%
1959 -53.76 % change on previous year -139.6%
1960 25.5 % change on previous year -147.4%
1961 49.02 % change on previous year +92.2%
1962 -51.89 % change on previous year -205.8%
1963 -7.31 % change on previous year -85.9%
1964 -29.58 % change on previous year +304.9%
1965 85.78 % change on previous year -390.0%
1966 -16.65 % change on previous year -119.4%
1967 118.52 % change on previous year -811.9%
1968 -54.16 % change on previous year -145.7%
1969 12.09 % change on previous year -122.3%
1970 31.78 % change on previous year +162.8%
1971 -7.85 % change on previous year -124.7%
1972 31.99 % change on previous year -507.6%
1973 -26.43 % change on previous year -182.6%
1974 24.6 % change on previous year -193.0%
1975 -30.17 % change on previous year -222.7%
1976 -23.97 % change on previous year -20.6%
1977 57.76 % change on previous year -341.0%
1978 -16.11 % change on previous year -127.9%
1979 14.28 % change on previous year -188.6%
1980 -26.8 % change on previous year -287.6%
1981 67.83 % change on previous year -353.1%
1982 -5.48 % change on previous year -108.1%
1983 -43.88 % change on previous year +701.2%
1984 40.71 % change on previous year -192.8%
1985 35.55 % change on previous year -12.7%
1986 6.82 % change on previous year -80.8%
1987 27.5 % change on previous year +303.4%
1988 -16.96 % change on previous year -161.7%
1989 -44.81 % change on previous year +164.2%
1990 93.29 % change on previous year -308.2%
1991 -9.42 % change on previous year -110.1%
1992 27.87 % change on previous year -396.0%
1993 -48.13 % change on previous year -272.7%
1994 21.14 % change on previous year -143.9%
1995 -5.87 % change on previous year -127.8%
1996 32.22 % change on previous year -648.6%
1997 -36.87 % change on previous year -214.4%
1998 48.89 % change on previous year -232.6%
1999 -29.07 % change on previous year -159.4%
2000 -20.95 % change on previous year -27.9%
2001 9.03 % change on previous year -143.1%
2002 46.45 % change on previous year +414.4%
2003 36.22 % change on previous year -22.0%
2004 -26.61 % change on previous year -173.5%
2005 -15.11 % change on previous year -43.2%
2006 52.85 % change on previous year -449.8%
2007 -39.88 % change on previous year -175.5%
2008 41.26 % change on previous year -203.5%
2009 19.19 % change on previous year -53.5%
2010 -45.86 % change on previous year -339.0%
2011 2.52 % change on previous year -105.5%
2012 37.64 % change on previous year +1395.5%
2013 -14.44 % change on previous year -138.4%
2014 44.31 % change on previous year -406.9%
2015 26.26 % change on previous year -40.7%
2016 -30.53 % change on previous year -216.3%
2017 52.46 % change on previous year -271.8%
2018 -6.08 % change on previous year -111.6%
2019 -47.36 % change on previous year +679.1%
2020 52.07 % change on previous year -209.9%
2021 36.04 % change on previous year -30.8%
2022 6.8 % change on previous year -81.1%
2023 -11.57 % change on previous year -270.3%
2024 -10.15 % change on previous year -12.3%
2025 -72.66 % change on previous year +616.1%

Averages by decade

DecadeAverage LowestHighest Years
1950s 20 % change on previous year -63.4 % change on previous year 140.39 % change on previous year 9
1960s 13.13 % change on previous year -54.16 % change on previous year 118.52 % change on previous year 10
1970s 5.59 % change on previous year -30.17 % change on previous year 57.76 % change on previous year 10
1980s 4.05 % change on previous year -44.81 % change on previous year 67.83 % change on previous year 10
1990s 9.41 % change on previous year -48.13 % change on previous year 93.29 % change on previous year 10
2000s 10.25 % change on previous year -39.88 % change on previous year 52.85 % change on previous year 10
2010s 1.89 % change on previous year -47.36 % change on previous year 52.46 % change on previous year 10
2020s 0.0874 % change on previous year -72.66 % change on previous year 52.07 % change on previous year 6

More reference data data for Portland

All data for Portland →

Frequently asked questions

What is cooling and heating degree days - cities and fuas — cooling degree in Portland?
Cooling and heating degree days - cities and fuas — cooling degree in Portland was -72.66 % change on previous year in 2025, according to Statizoid (derived).
What is the highest cooling and heating degree days - cities and fuas — cooling degree recorded in Portland?
The highest recorded value was 140.39 % change on previous year in 1955.
What is the lowest cooling and heating degree days - cities and fuas — cooling degree recorded in Portland?
The lowest recorded value was -72.66 % change on previous year in 2025.
How does Portland rank for cooling and heating degree days - cities and fuas — cooling degree?
Portland ranks 997th out of 1306 regions with data for 2025.
Is cooling and heating degree days - cities and fuas — cooling degree rising or falling in Portland?
Over the last ten years it is down 376.7%. The long-run trend across the full record is volatile.
Where does this Portland data come from?
The figures come from Statizoid (derived), published as part of Cooling and heating degree days - Cities and FUAs — Cooling degree days, annual growth rate. Statizoid updates them automatically from the source API.

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Cooling and heating degree days - Cities and FUAs — Cooling degree in Portland. Statizoid, drawing on Statizoid (derived). Retrieved 14 October 2026, from https://reference.statizoid.com/stat/cooling-and-heating-degree-days-cities-and-fuas-cooling-degree-days-annual-growth-rate/portland/

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<a href="https://reference.statizoid.com/stat/cooling-and-heating-degree-days-cities-and-fuas-cooling-degree-days-annual-growth-rate/portland/">Cooling and heating degree days - Cities and FUAs — Cooling degree in Portland</a> — Statizoid

How this figure is calculated

The year-on-year percentage change in Cooling and heating degree days - Cities and FUAs — Cooling degree days. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.

Computed from

Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.

About this data

Indicator
Cooling and heating degree days - Cities and FUAs — Cooling degree days, annual growth rate
Unit
% change on previous year
Source
Statizoid (derived)
Licence
Derived by Statizoid from the sources named on the page
Coverage
1,324 places, 97,987 data points, 1951–2025
Last refreshed

The year-on-year percentage change in Cooling and heating degree days - Cities and FUAs — Cooling degree days. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.