Cooling and heating degree days - Cities and FUAs — Change in heating in Boulogne-sur-Mer
Boulogne-sur-Mer: Cooling and heating degree days - Cities and FUAs — Change in heating was -40.52 % change on previous year in 2025. ◆ Volatile
Latest (2025)
-40.52 % change on previous year
Change on year
down 628.4%
Rank
711th
of 1290 regions
All-time high
988.61 % change on previous year
in 1975
All-time low
-698.91 % change on previous year
in 1998
Years of data
73
1951–2025
Cooling and heating degree days - Cities and FUAs — Change in heating in Boulogne-sur-Mer, 1951–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
Boulogne-sur-Mer recorded -40.52 % change on previous year for cooling and heating degree days - cities and fuas — change in heating in 2025.
That represents a change of down 628.4% on the previous year and down 201.3% over ten years.
Over the whole period, cooling and heating degree days - cities and fuas — change in heating in Boulogne-sur-Mer peaked at 988.61 % change on previous year in 1975 and was at its lowest, -698.91 % change on previous year, in 1998.
Boulogne-sur-Mer ranks 711th of 1290 regions on this measure, in the middle of the range.
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 Boulogne-sur-Mer, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1951 | -45.39 % change on previous year | — |
| 1952 | 144.36 % change on previous year | -418.1% |
| 1953 | -65.6 % change on previous year | -145.4% |
| 1954 | 159.81 % change on previous year | -343.6% |
| 1955 | 86.93 % change on previous year | -45.6% |
| 1956 | 18.55 % change on previous year | -78.7% |
| 1957 | -107.45 % change on previous year | -679.4% |
| 1958 | 584.49 % change on previous year | -643.9% |
| 1959 | -153.81 % change on previous year | -126.3% |
| 1960 | 132.03 % change on previous year | -185.8% |
| 1961 | -413.22 % change on previous year | -413.0% |
| 1962 | 596.45 % change on previous year | -244.3% |
| 1963 | 35.9 % change on previous year | -94.0% |
| 1964 | -55.08 % change on previous year | -253.4% |
| 1965 | 0.8818 % change on previous year | -101.6% |
| 1966 | -64.8 % change on previous year | -7448.4% |
| 1967 | -24.96 % change on previous year | -61.5% |
| 1968 | 274.83 % change on previous year | -1201.0% |
| 1969 | 22.65 % change on previous year | -91.8% |
| 1970 | -45.12 % change on previous year | -299.2% |
| 1971 | -57.79 % change on previous year | +28.1% |
| 1972 | 142.44 % change on previous year | -346.5% |
| 1973 | 0.9203 % change on previous year | -99.4% |
| 1974 | -93.32 % change on previous year | -10239.6% |
| 1975 | 988.61 % change on previous year | -1159.4% |
| 1976 | 24.04 % change on previous year | -97.6% |
| 1977 | -63.9 % change on previous year | -365.8% |
| 1978 | 203.26 % change on previous year | -418.1% |
| 1979 | 75.41 % change on previous year | -62.9% |
| 1980 | -27.86 % change on previous year | -136.9% |
| 1981 | -32.06 % change on previous year | +15.0% |
| 1982 | -81.17 % change on previous year | +153.2% |
| 1983 | 100.57 % change on previous year | -223.9% |
| 1984 | 74 % change on previous year | -26.4% |
| 1985 | 282.74 % change on previous year | +282.1% |
| 1986 | -18.62 % change on previous year | -106.6% |
| 1987 | 8.82 % change on previous year | -147.3% |
| 1988 | -128.58 % change on previous year | -1558.4% |
| 1989 | -88.91 % change on previous year | -30.9% |
| 1990 | -57.37 % change on previous year | -35.5% |
| 1991 | 158.82 % change on previous year | -376.9% |
| 1992 | -94.08 % change on previous year | -159.2% |
| 1993 | 480.04 % change on previous year | -610.2% |
| 1994 | -391.08 % change on previous year | -181.5% |
| 1995 | 60.3 % change on previous year | -115.4% |
| 1996 | 644.54 % change on previous year | +968.8% |
| 1997 | -103.52 % change on previous year | -116.1% |
| 1998 | -698.91 % change on previous year | +575.2% |
| 1999 | -82.96 % change on previous year | -88.1% |
| 2000 | 11.11 % change on previous year | -113.4% |
| 2001 | 105.24 % change on previous year | +847.0% |
| 2003 | 77.71 % change on previous year | -26.2% |
| 2004 | -82.34 % change on previous year | -206.0% |
| 2005 | -19.29 % change on previous year | -76.6% |
| 2006 | 17.44 % change on previous year | -190.4% |
| 2007 | -207.12 % change on previous year | -1287.5% |
| 2008 | 70.65 % change on previous year | -134.1% |
| 2009 | 36.99 % change on previous year | -47.6% |
| 2010 | 735.62 % change on previous year | +1888.8% |
| 2011 | -192.89 % change on previous year | -126.2% |
| 2012 | 101.68 % change on previous year | -152.7% |
| 2014 | -319.67 % change on previous year | -414.4% |
| 2015 | 39.99 % change on previous year | -112.5% |
| 2016 | 57.05 % change on previous year | +42.7% |
| 2017 | -145.97 % change on previous year | -355.9% |
| 2018 | 32.52 % change on previous year | -122.3% |
| 2019 | -48 % change on previous year | -247.6% |
| 2020 | -57.58 % change on previous year | +20.0% |
| 2021 | 78.08 % change on previous year | -235.6% |
| 2022 | -335.72 % change on previous year | -530.0% |
| 2023 | 36.5 % change on previous year | -110.9% |
| 2024 | -5.56 % change on previous year | -115.2% |
| 2025 | -40.52 % change on previous year | +628.4% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 69.1 % change on previous year | -153.81 % change on previous year | 584.49 % change on previous year | 9 |
| 1960s | 50.47 % change on previous year | -413.22 % change on previous year | 596.45 % change on previous year | 10 |
| 1970s | 117.45 % change on previous year | -93.32 % change on previous year | 988.61 % change on previous year | 10 |
| 1980s | 8.89 % change on previous year | -128.58 % change on previous year | 282.74 % change on previous year | 10 |
| 1990s | -8.42 % change on previous year | -698.91 % change on previous year | 644.54 % change on previous year | 10 |
| 2000s | 1.15 % change on previous year | -207.12 % change on previous year | 105.24 % change on previous year | 9 |
| 2010s | 28.93 % change on previous year | -319.67 % change on previous year | 735.62 % change on previous year | 9 |
| 2020s | -54.13 % change on previous year | -335.72 % change on previous year | 78.08 % change on previous year | 6 |
More reference data data for Boulogne-sur-Mer
- Cooling and heating degree days - Cities and FUAs — Cooling degree 4.78 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in cooling -11.59 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs 1,510 Degree days (2025)
- Cooling and heating degree days - Cities and FUAs — Change in heating -365.41 Degree days (2025)
- Precipitation - Cities and FUAs — Extreme precipitation days 5 Days per year (2024)
- Precipitation - Cities and FUAs — Change in extreme precipitation 2.68 Days per year (2024)
- Dependency ratio - Cities and FUAs 33.4 Percentage of population aged 15-64 years (2022)
- Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area (2023)
- Coastal flooding - Cities and FUAs — Built-up area exposure to 0.9549 Percentage of built-up area (2022)
- Main mode of transport to work - Cities and FUAs — Employed persons 25,771 Persons (2022)
Frequently asked questions
- What is cooling and heating degree days - cities and fuas — change in heating in Boulogne-sur-Mer?
- Cooling and heating degree days - cities and fuas — change in heating in Boulogne-sur-Mer was -40.52 % 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 Boulogne-sur-Mer?
- The highest recorded value was 988.61 % change on previous year in 1975.
- What is the lowest cooling and heating degree days - cities and fuas — change in heating recorded in Boulogne-sur-Mer?
- The lowest recorded value was -698.91 % change on previous year in 1998.
- How does Boulogne-sur-Mer rank for cooling and heating degree days - cities and fuas — change in heating?
- Boulogne-sur-Mer ranks 711th out of 1290 regions with data for 2025.
- Is cooling and heating degree days - cities and fuas — change in heating rising or falling in Boulogne-sur-Mer?
- Over the last ten years it is down 201.3%. The long-run trend across the full record is volatile.
- Where does this Boulogne-sur-Mer 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 — 73 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.