Cooling and heating degree days - Cities and FUAs — Cooling degree in Boulder
Boulder: Cooling and heating degree days - Cities and FUAs — Cooling degree was -86.1 % change on previous year in 2025. ◆ Volatile
Cooling and heating degree days - Cities and FUAs — Cooling degree in Boulder, 1951–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
Boulder recorded -86.1 % 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.
The figure is down 238.3% on the previous year and down 574.8% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas — cooling degree in Boulder peaked at 115.93 % change on previous year in 2000 and was at its lowest, -86.1 % change on previous year, in 2025.
Boulder ranks 1132nd 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 degree days - Cities and FUAs — Cooling degree in Boulder, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1951 | -13.24 % change on previous year | — |
| 1952 | 74.98 % change on previous year | -666.5% |
| 1953 | 2.75 % change on previous year | -96.3% |
| 1954 | 38.27 % change on previous year | +1293.9% |
| 1955 | -25.84 % change on previous year | -167.5% |
| 1956 | -9.1 % change on previous year | -64.8% |
| 1957 | -24.25 % change on previous year | +166.5% |
| 1958 | 7 % change on previous year | -128.9% |
| 1959 | 3.33 % change on previous year | -52.4% |
| 1960 | 20.66 % change on previous year | +519.9% |
| 1961 | -43.38 % change on previous year | -309.9% |
| 1962 | 51.8 % change on previous year | -219.4% |
| 1963 | 19.37 % change on previous year | -62.6% |
| 1964 | -0.2702 % change on previous year | -101.4% |
| 1965 | -52.23 % change on previous year | +19231.0% |
| 1966 | 90.85 % change on previous year | -274.0% |
| 1967 | -50.6 % change on previous year | -155.7% |
| 1968 | 44.87 % change on previous year | -188.7% |
| 1969 | 33.71 % change on previous year | -24.9% |
| 1970 | -9.09 % change on previous year | -127.0% |
| 1971 | -12.86 % change on previous year | +41.5% |
| 1972 | -13.6 % change on previous year | +5.7% |
| 1973 | 19.13 % change on previous year | -240.7% |
| 1974 | 14.96 % change on previous year | -21.8% |
| 1975 | -7.91 % change on previous year | -152.9% |
| 1976 | -4.75 % change on previous year | -40.0% |
| 1977 | 14.98 % change on previous year | -415.5% |
| 1978 | 14.76 % change on previous year | -1.4% |
| 1979 | -13.67 % change on previous year | -192.6% |
| 1980 | 22.7 % change on previous year | -266.1% |
| 1981 | -30.32 % change on previous year | -233.5% |
| 1982 | -27.53 % change on previous year | -9.2% |
| 1983 | 14.16 % change on previous year | -151.5% |
| 1984 | -15.56 % change on previous year | -209.8% |
| 1985 | 33.55 % change on previous year | -315.7% |
| 1986 | -16.24 % change on previous year | -148.4% |
| 1987 | 9.79 % change on previous year | -160.3% |
| 1988 | 48 % change on previous year | +390.3% |
| 1989 | -21.65 % change on previous year | -145.1% |
| 1990 | 7.63 % change on previous year | -135.3% |
| 1991 | -32.46 % change on previous year | -525.2% |
| 1992 | -3.7 % change on previous year | -88.6% |
| 1993 | 23.13 % change on previous year | -725.6% |
| 1994 | 86.41 % change on previous year | +273.6% |
| 1995 | -26 % change on previous year | -130.1% |
| 1996 | -6.97 % change on previous year | -73.2% |
| 1997 | -17.2 % change on previous year | +146.7% |
| 1998 | 30.99 % change on previous year | -280.2% |
| 1999 | -26.94 % change on previous year | -186.9% |
| 2000 | 115.93 % change on previous year | -530.3% |
| 2001 | -23.62 % change on previous year | -120.4% |
| 2002 | 34.38 % change on previous year | -245.5% |
| 2003 | -23.98 % change on previous year | -169.8% |
| 2004 | -42.02 % change on previous year | +75.2% |
| 2005 | 97.8 % change on previous year | -332.8% |
| 2006 | 3.99 % change on previous year | -95.9% |
| 2007 | 6.99 % change on previous year | +75.5% |
| 2008 | -17.58 % change on previous year | -351.4% |
| 2009 | -35.64 % change on previous year | +102.7% |
| 2010 | 70.95 % change on previous year | -299.1% |
| 2011 | -1.98 % change on previous year | -102.8% |
| 2012 | 55.21 % change on previous year | -2893.9% |
| 2013 | -29.27 % change on previous year | -153.0% |
| 2014 | -28.98 % change on previous year | -1.0% |
| 2015 | 18.13 % change on previous year | -162.6% |
| 2016 | 12.13 % change on previous year | -33.1% |
| 2017 | -14.49 % change on previous year | -219.5% |
| 2018 | 20.03 % change on previous year | -238.2% |
| 2019 | -2.08 % change on previous year | -110.4% |
| 2020 | 23.36 % change on previous year | -1224.4% |
| 2021 | -13.2 % change on previous year | -156.5% |
| 2022 | 10.12 % change on previous year | -176.6% |
| 2023 | -36.01 % change on previous year | -455.8% |
| 2024 | 62.25 % change on previous year | -272.9% |
| 2025 | -86.1 % change on previous year | -238.3% |
Biggest year-on-year movements
Years where Cooling and heating degree days - Cities and FUAs — Cooling degree in Boulder changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1965 | -19231.0% | -0.2702 % change on previous year | -52.23 % change on previous year |
| 2012 | +2893.9% | -1.98 % change on previous year | 55.21 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 5.99 % change on previous year | -25.84 % change on previous year | 74.98 % change on previous year | 9 |
| 1960s | 11.48 % change on previous year | -52.23 % change on previous year | 90.85 % change on previous year | 10 |
| 1970s | 0.1948 % change on previous year | -13.67 % change on previous year | 19.13 % change on previous year | 10 |
| 1980s | 1.69 % change on previous year | -30.32 % change on previous year | 48 % change on previous year | 10 |
| 1990s | 3.49 % change on previous year | -32.46 % change on previous year | 86.41 % change on previous year | 10 |
| 2000s | 11.62 % change on previous year | -42.02 % change on previous year | 115.93 % change on previous year | 10 |
| 2010s | 9.97 % change on previous year | -29.27 % change on previous year | 70.95 % change on previous year | 10 |
| 2020s | -6.6 % change on previous year | -86.1 % change on previous year | 62.25 % change on previous year | 6 |
More reference data data for Boulder
- Cooling and heating degree days - Cities and FUAs — Cooling degree 16.3 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -49.07 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs 3,762 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -659.64 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -179.6 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs, annual growth rate -10.12 % change on previous year (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -194.6 % change on previous year (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 1.86 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation -1.3 Days per year (2024)
- Dependency ratio - Cities and FUAs 25.3 Percentage of population aged 15-64 years (2024)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas — cooling degree in Boulder?
- Cooling and heating degree days - cities and fuas — cooling degree in Boulder was -86.1 % 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 Boulder?
- The highest recorded value was 115.93 % change on previous year in 2000.
- What is the lowest cooling and heating degree days - cities and fuas — cooling degree recorded in Boulder?
- The lowest recorded value was -86.1 % change on previous year in 2025.
- How does Boulder rank for cooling and heating degree days - cities and fuas — cooling degree?
- Boulder ranks 1132nd out of 1306 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas — cooling degree rising or falling in Boulder?
- Over the last ten years it is down 574.8%. The long-run trend across the full record is volatile.
- Where does this Boulder 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.
Download this data
CSV · JSON — 75 observations, free to reuse under Derived by Statizoid from the sources named on the page.
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
- Cooling and heating degree days - Cities and FUAs — Cooling degree Organisation for Economic Co-operation and Development
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
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.