Average annual surface temperature in Heard Island and McDonald Islands
Heard Island and McDonald Islands: Average annual surface temperature was 2.45 in 2025. ▲ Rising
Latest (2025)
2.45
Change on year
up 23.2%
World rank
188th
of 193 countries
All-time high
2.45
in 2025
All-time low
0.6127
in 1944
Years of data
86
1940–2025
Average annual surface temperature in Heard Island and McDonald Islands, 1940–2025
Source: Our World in Data.
Analysis
In 2025, average annual surface temperature in Heard Island and McDonald Islands stood at 2.45. That is the highest value across all 86 years on record.
Compared with earlier readings it is up 23.2% on the previous year and up 67.9% over ten years.
Over the whole period, average annual surface temperature in Heard Island and McDonald Islands peaked at 2.45 in 2025 and was at its lowest, 0.6127, in 1944.
Heard Island and McDonald Islands ranks 188th of 193 countries on this measure, in the bottom quarter.
The long-run direction has been consistently rising across the 86 years of available data.
Average annual surface temperature in Heard Island and McDonald Islands, year by year
| Year | Value | Change |
|---|---|---|
| 1940 | 0.8284 | — |
| 1941 | 0.6264 | -24.4% |
| 1942 | 1.06 | +69.4% |
| 1943 | 0.894 | -15.8% |
| 1944 | 0.6127 | -31.5% |
| 1945 | 0.942 | +53.7% |
| 1946 | 1.15 | +21.9% |
| 1947 | 1.28 | +11.4% |
| 1948 | 0.9664 | -24.5% |
| 1949 | 0.7662 | -20.7% |
| 1950 | 0.8517 | +11.2% |
| 1951 | 1.53 | +79.2% |
| 1952 | 1.35 | -11.4% |
| 1953 | 1.12 | -17.4% |
| 1954 | 1.11 | -0.8% |
| 1955 | 1.01 | -9.3% |
| 1956 | 1.07 | +6.3% |
| 1957 | 0.9825 | -8.1% |
| 1958 | 1.48 | +50.8% |
| 1959 | 1.19 | -19.5% |
| 1960 | 1.52 | +27.8% |
| 1961 | 1.37 | -10.3% |
| 1962 | 1.22 | -10.8% |
| 1963 | 1.06 | -12.9% |
| 1964 | 1.07 | +0.9% |
| 1965 | 1.2 | +12.2% |
| 1966 | 1.35 | +12.3% |
| 1967 | 1.24 | -7.9% |
| 1968 | 1.53 | +22.8% |
| 1969 | 1.56 | +2.2% |
| 1970 | 1.48 | -5.4% |
| 1971 | 1.31 | -11.5% |
| 1972 | 1.19 | -8.7% |
| 1973 | 1.24 | +3.8% |
| 1974 | 0.974 | -21.3% |
| 1975 | 1.13 | +16.2% |
| 1976 | 1.07 | -5.0% |
| 1977 | 1.43 | +33.5% |
| 1978 | 1.57 | +9.3% |
| 1979 | 1.85 | +18.2% |
| 1980 | 1.64 | -11.4% |
| 1981 | 1.72 | +4.9% |
| 1982 | 1.94 | +12.8% |
| 1983 | 1.64 | -15.5% |
| 1984 | 1.34 | -18.5% |
| 1985 | 1.37 | +2.0% |
| 1986 | 1.45 | +6.2% |
| 1987 | 1.7 | +17.3% |
| 1988 | 1.38 | -18.6% |
| 1989 | 1.36 | -1.4% |
| 1990 | 1.45 | +6.4% |
| 1991 | 1.59 | +9.3% |
| 1992 | 1.61 | +1.5% |
| 1993 | 1.48 | -8.0% |
| 1994 | 1.28 | -13.6% |
| 1995 | 1.4 | +9.3% |
| 1996 | 1.14 | -18.6% |
| 1997 | 1.83 | +60.1% |
| 1998 | 1.82 | -0.2% |
| 1999 | 1.33 | -26.9% |
| 2000 | 1.34 | +0.2% |
| 2001 | 1.62 | +20.9% |
| 2002 | 1.58 | -2.2% |
| 2003 | 1.85 | +17.0% |
| 2004 | 1.67 | -9.4% |
| 2005 | 1.35 | -19.3% |
| 2006 | 1.38 | +2.4% |
| 2007 | 1.25 | -9.6% |
| 2008 | 1.66 | +32.8% |
| 2009 | 1.48 | -10.5% |
| 2010 | 1.79 | +20.3% |
| 2011 | 1.64 | -8.3% |
| 2012 | 2.01 | +22.6% |
| 2013 | 1.7 | -15.1% |
| 2014 | 1.12 | -34.5% |
| 2015 | 1.46 | +30.4% |
| 2016 | 1.99 | +36.4% |
| 2017 | 2.26 | +13.7% |
| 2018 | 2.04 | -9.7% |
| 2019 | 1.96 | -4.2% |
| 2020 | 1.88 | -4.1% |
| 2021 | 1.81 | -3.3% |
| 2022 | 1.75 | -3.4% |
| 2023 | 2.24 | +27.7% |
| 2024 | 1.99 | -11.3% |
| 2025 | 2.45 | +23.2% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | 0.9125 | 0.6127 | 1.28 | 10 |
| 1950s | 1.17 | 0.8517 | 1.53 | 10 |
| 1960s | 1.31 | 1.06 | 1.56 | 10 |
| 1970s | 1.32 | 0.974 | 1.85 | 10 |
| 1980s | 1.56 | 1.34 | 1.94 | 10 |
| 1990s | 1.49 | 1.14 | 1.83 | 10 |
| 2000s | 1.52 | 1.25 | 1.85 | 10 |
| 2010s | 1.8 | 1.12 | 2.26 | 10 |
| 2020s | 2.02 | 1.75 | 2.45 | 6 |
Countries ranked near Heard Island and McDonald Islands
- 185 Tajikistan 2.63 compare
- 186 Kyrgyzstan 2.5 compare
- 187 Norway 2.5 compare
- 189 Mongolia 2.24 compare
- 190 South Georgia and the South Sandwich Islands -0.0896 compare
- 191 Russia -2.35 compare
More reference data data for Heard Island and McDonald Islands
- Country level monthly temperature anomalies 0.876 (2026)
- Spring temperature anomalies 0.8521 (2026)
- Autumn temperature anomalies 0.6023 (2026)
- Summer temperature anomalies 1.56 (2026)
- Average precipitation per year 1,377 (2025)
- Annual precipitation, annual growth rate 3.05 % change on previous year (2025)
- Global precipitation anomaly 29.5 (2025)
- Winter temperature anomalies 0.8706 (2025)
- Exposure to extreme temperature — Annual temperature change 0.729 Degrees celsius (2023)
- Exposure to extreme precipitation — Annual precipitation change -17.8 Millimetres per year (2023)
Frequently asked questions
- What is average annual surface temperature in Heard Island and McDonald Islands?
- Average annual surface temperature in Heard Island and McDonald Islands was 2.45 in 2025, according to Our World in Data.
- What is the highest average annual surface temperature recorded in Heard Island and McDonald Islands?
- The highest recorded value was 2.45 in 2025.
- What is the lowest average annual surface temperature recorded in Heard Island and McDonald Islands?
- The lowest recorded value was 0.6127 in 1944.
- How does Heard Island and McDonald Islands rank for average annual surface temperature?
- Heard Island and McDonald Islands ranks 188th out of 193 countries with data for 2025.
- Is average annual surface temperature rising or falling in Heard Island and McDonald Islands?
- Over the last ten years it is up 67.9%. The long-run trend across the full record is rising.
- Where does this Heard Island and McDonald Islands data come from?
- The figures come from Our World in Data, published as part of Average annual surface temperature. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 86 observations, free to reuse under CC BY 4.0 (Our World in Data).