Decadal average surface temperature in Heard Island and McDonald Islands
Heard Island and McDonald Islands: Decadal average surface temperature was 1.8 °C in 2010. ▲ Rising
Decadal average surface temperature in Heard Island and McDonald Islands, 1940–2010
Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data. Measured in °C.
Analysis
Heard Island and McDonald Islands recorded 1.8 °C for decadal average surface temperature in 2010. That is the highest value across all 8 years on record.
Compared with earlier readings it is up 18.4% over ten years.
Over the whole period, decadal average surface temperature in Heard Island and McDonald Islands peaked at 1.8 °C in 2010 and was at its lowest, 0.9125 °C, in 1940.
Heard Island and McDonald Islands ranks 185th of 193 countries on this measure, in the bottom quarter.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | 0.9125 °C | 0.9125 °C | 0.9125 °C | 1 |
| 1950s | 1.17 °C | 1.17 °C | 1.17 °C | 1 |
| 1960s | 1.31 °C | 1.31 °C | 1.31 °C | 1 |
| 1970s | 1.32 °C | 1.32 °C | 1.32 °C | 1 |
| 1980s | 1.56 °C | 1.56 °C | 1.56 °C | 1 |
| 1990s | 1.49 °C | 1.49 °C | 1.49 °C | 1 |
| 2000s | 1.52 °C | 1.52 °C | 1.52 °C | 1 |
| 2010s | 1.8 °C | 1.8 °C | 1.8 °C | 1 |
Countries ranked near Heard Island and McDonald Islands
More reference data data for Heard Island and McDonald Islands
- Summer temperature anomalies 1.56 °C (2026)
- Spring temperature anomalies 0.8521 °C (2026)
- Temperature anomalies by month 0.876 °C (2026)
- Annual precipitation 1,377 millimeters (2025)
- Precipitation anomalies 29.5 millimeters (2025)
- Autumn temperature anomalies 0.9668 °C (2025)
- Winter temperature anomalies 0.8706 °C (2025)
- Annual temperature anomalies 0.8308 °C (2025)
- Average annual surface temperature 2.45 °C (2025)
- Red List Index 0.93 index (2024)
Frequently asked questions
- What is decadal average surface temperature in Heard Island and McDonald Islands?
- Decadal average surface temperature in Heard Island and McDonald Islands was 1.8 °C in 2010, according to Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data.
- What is the highest decadal average surface temperature recorded in Heard Island and McDonald Islands?
- The highest recorded value was 1.8 °C in 2010.
- What is the lowest decadal average surface temperature recorded in Heard Island and McDonald Islands?
- The lowest recorded value was 0.9125 °C in 1940.
- How does Heard Island and McDonald Islands rank for decadal average surface temperature?
- Heard Island and McDonald Islands ranks 185th out of 193 countries with data for 2010.
- Is decadal average surface temperature rising or falling in Heard Island and McDonald Islands?
- Over the last ten years it is up 18.4%. 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 Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data, published as part of Decadal average surface temperature. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 8 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
The temperature of the air measured 2 meters above the ground, encompassing land, sea, and in-land water surfaces.