Cooling and heating degree days - Cities and FUAs — Change in heating in Hartford
Hartford: Cooling and heating degree days - Cities and FUAs — Change in heating was 89.05 % change on previous year in 2025. ◆ Volatile
Latest (2025)
89.05 % change on previous year
Change on year
up 208.3%
Rank
100th
of 1290 regions
All-time high
882.12 % change on previous year
in 1996
All-time low
-834.98 % change on previous year
in 2008
Years of data
70
1951–2025
Cooling and heating degree days - Cities and FUAs — Change in heating in Hartford, 1951–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
In 2025, cooling and heating degree days - cities and fuas — change in heating in Hartford stood at 89.05 % change on previous year.
That represents a change of up 208.3% on the previous year and up 237.7% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas — change in heating in Hartford peaked at 882.12 % change on previous year in 1996 and was at its lowest, -834.98 % change on previous year, in 2008.
Hartford ranks 100th of 1290 regions on this measure, in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Cooling and heating degree days - Cities and FUAs — Change in heating in Hartford, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1951 | -168.38 % change on previous year | — |
| 1952 | 89.89 % change on previous year | -153.4% |
| 1954 | 104.19 % change on previous year | +15.9% |
| 1956 | 47.21 % change on previous year | -54.7% |
| 1957 | -129.94 % change on previous year | -375.2% |
| 1958 | 596.49 % change on previous year | -559.0% |
| 1959 | -75.46 % change on previous year | -112.7% |
| 1960 | 131.74 % change on previous year | -274.6% |
| 1961 | 28.34 % change on previous year | -78.5% |
| 1962 | 26.68 % change on previous year | -5.9% |
| 1963 | -6.73 % change on previous year | -125.2% |
| 1964 | -49.23 % change on previous year | +631.3% |
| 1965 | 98 % change on previous year | -299.0% |
| 1966 | -34.78 % change on previous year | -135.5% |
| 1967 | 76.87 % change on previous year | -321.0% |
| 1968 | -16.4 % change on previous year | -121.3% |
| 1969 | 25.64 % change on previous year | -256.3% |
| 1970 | -2.51 % change on previous year | -109.8% |
| 1971 | -21.15 % change on previous year | +743.1% |
| 1972 | 13.7 % change on previous year | -164.8% |
| 1973 | -158.14 % change on previous year | -1253.9% |
| 1974 | 117.18 % change on previous year | -174.1% |
| 1975 | -409.59 % change on previous year | -449.6% |
| 1976 | 301.75 % change on previous year | -173.7% |
| 1977 | -22.74 % change on previous year | -107.5% |
| 1978 | 109.68 % change on previous year | -582.3% |
| 1979 | -102.4 % change on previous year | -193.4% |
| 1981 | -55.25 % change on previous year | -46.0% |
| 1982 | -21.1 % change on previous year | -61.8% |
| 1983 | -84.13 % change on previous year | +298.8% |
| 1984 | -74.94 % change on previous year | -10.9% |
| 1986 | -38.81 % change on previous year | -48.2% |
| 1987 | 261.43 % change on previous year | -773.6% |
| 1988 | 61.04 % change on previous year | -76.7% |
| 1989 | 16.42 % change on previous year | -73.1% |
| 1990 | -304.75 % change on previous year | -1956.3% |
| 1991 | 22.05 % change on previous year | -107.2% |
| 1992 | 141.72 % change on previous year | +542.7% |
| 1993 | -14.6 % change on previous year | -110.3% |
| 1994 | 18.53 % change on previous year | -226.9% |
| 1995 | -85.27 % change on previous year | -560.2% |
| 1996 | 882.12 % change on previous year | -1134.5% |
| 1997 | -56.04 % change on previous year | -106.4% |
| 1998 | -552.83 % change on previous year | +886.5% |
| 1999 | 52.4 % change on previous year | -109.5% |
| 2000 | 160.37 % change on previous year | +206.1% |
| 2001 | -225.79 % change on previous year | -240.8% |
| 2002 | 7.28 % change on previous year | -103.2% |
| 2003 | 302.52 % change on previous year | +4057.9% |
| 2004 | -54.56 % change on previous year | -118.0% |
| 2005 | 9.61 % change on previous year | -117.6% |
| 2006 | -373.77 % change on previous year | -3987.8% |
| 2007 | 102.97 % change on previous year | -127.5% |
| 2008 | -834.98 % change on previous year | -910.9% |
| 2009 | 166.53 % change on previous year | -119.9% |
| 2010 | -450.57 % change on previous year | -370.6% |
| 2011 | 13.39 % change on previous year | -103.0% |
| 2012 | -194.67 % change on previous year | -1554.3% |
| 2013 | 112.18 % change on previous year | -157.6% |
| 2014 | 204.51 % change on previous year | +82.3% |
| 2015 | -64.67 % change on previous year | -131.6% |
| 2016 | -499.8 % change on previous year | +672.8% |
| 2017 | 32.88 % change on previous year | -106.6% |
| 2018 | 85.44 % change on previous year | +159.9% |
| 2019 | -11.09 % change on previous year | -113.0% |
| 2021 | 16.43 % change on previous year | -248.1% |
| 2022 | 35.57 % change on previous year | +116.5% |
| 2023 | -106.37 % change on previous year | -399.1% |
| 2024 | 28.89 % change on previous year | -127.2% |
| 2025 | 89.05 % change on previous year | +208.3% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 66.29 % change on previous year | -168.38 % change on previous year | 596.49 % change on previous year | 7 |
| 1960s | 28.01 % change on previous year | -49.23 % change on previous year | 131.74 % change on previous year | 10 |
| 1970s | -17.42 % change on previous year | -409.59 % change on previous year | 301.75 % change on previous year | 10 |
| 1980s | 8.08 % change on previous year | -84.13 % change on previous year | 261.43 % change on previous year | 8 |
| 1990s | 10.33 % change on previous year | -552.83 % change on previous year | 882.12 % change on previous year | 10 |
| 2000s | -73.98 % change on previous year | -834.98 % change on previous year | 302.52 % change on previous year | 10 |
| 2010s | -77.24 % change on previous year | -499.8 % change on previous year | 204.51 % change on previous year | 10 |
| 2020s | 12.71 % change on previous year | -106.37 % change on previous year | 89.05 % change on previous year | 5 |
More reference data data for Hartford
- Cooling and heating degree days - Cities and FUAs — Cooling degree 115.25 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -66.61 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs 2,602 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -28.21 Degree days (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 13.73 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation -1.11 Days per year (2024)
- Dependency ratio - Cities and FUAs 28.9 Percentage of population aged 15-64 years (2024)
- Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area (2023)
- Coastal flooding - Cities and FUAs — Built-up area exposure to 0 Percentage of built-up area (2022)
- Main mode of transport to work - Cities and FUAs — Employed persons 411,729 Persons (2023)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas — change in heating in Hartford?
- Cooling and heating degree days - cities and fuas — change in heating in Hartford was 89.05 % change on previous year in 2025, according to Statizoid (derived).
- What is the highest cooling and heating degree days - cities and fuas — change in heating recorded in Hartford?
- The highest recorded value was 882.12 % change on previous year in 1996.
- What is the lowest cooling and heating degree days - cities and fuas — change in heating recorded in Hartford?
- The lowest recorded value was -834.98 % change on previous year in 2008.
- How does Hartford rank for cooling and heating degree days - cities and fuas — change in heating?
- Hartford ranks 100th out of 1290 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas — change in heating rising or falling in Hartford?
- Over the last ten years it is up 237.7%. The long-run trend across the full record is volatile.
- Where does this Hartford data come from?
- The figures come from Statizoid (derived), published as part of Cooling and heating degree days - Cities and FUAs — Change in heating degree days from 1981–2010 period to 2020–24 period, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 70 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 — Change in heating degree days from 1981–2010 period to 2020–24 period. 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 — Change in heating 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 — Change in heating degree days from 1981–2010 period to 2020–24 period. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.