Autumn temperature anomalies in Heard Island and McDonald Islands
Heard Island and McDonald Islands: Autumn temperature anomalies was 0.9668 in 2025. ◆ Volatile
Autumn temperature anomalies in Heard Island and McDonald Islands, 1940–2025
Source: Our World in Data.
Analysis
Heard Island and McDonald Islands recorded 0.9668 for autumn temperature anomalies in 2025. That is the highest value across all 86 years on record.
That represents a change of up 18.9% on the previous year and up 549.3% over ten years.
Over the whole period, autumn temperature anomalies in Heard Island and McDonald Islands peaked at 0.9668 in 2025 and was at its lowest, -2.89, in 1941.
That places Heard Island and McDonald Islands 56th out of 193 countries with data for 2025, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -1.85 | -2.89 | -0.6254 | 10 |
| 1950s | -0.6144 | -1.4 | 0.0031 | 10 |
| 1960s | -0.3935 | -0.9072 | 0.3825 | 10 |
| 1970s | -0.0629 | -0.9562 | 0.6931 | 10 |
| 1980s | -0.1025 | -0.6831 | 0.4965 | 10 |
| 1990s | -0.1891 | -0.8526 | 0.3661 | 10 |
| 2000s | 0.0979 | -0.6799 | 0.9452 | 10 |
| 2010s | 0.0891 | -1.17 | 0.8971 | 10 |
| 2020s | 0.4466 | 0.0775 | 0.9668 | 6 |
Countries ranked near Heard Island and McDonald Islands
- 53 Russia 1.03 compare
- 54 New Caledonia 1.02 compare
- 55 Suriname 1 compare
- 57 Saudi Arabia 0.9644 compare
- 58 Denmark 0.9586 compare
- 59 Uzbekistan 0.9551 compare
More reference data data for Heard Island and McDonald Islands
- Summer temperature anomalies 1.56 (2026)
- Spring temperature anomalies 0.8521 (2026)
- Country level monthly temperature anomalies 0.876 (2026)
- Average precipitation per year 1,377 (2025)
- Global precipitation anomaly 29.5 (2025)
- Winter temperature anomalies 0.8706 (2025)
- Annual temperature anomalies 0.8308 (2025)
- Average annual surface temperature 2.45 (2025)
- Red list index 0.93 (2024)
- Countries to the international treaty on plant genetic resources 0 (2024)
Frequently asked questions
- What is autumn temperature anomalies in Heard Island and McDonald Islands?
- Autumn temperature anomalies in Heard Island and McDonald Islands was 0.9668 in 2025, according to Our World in Data.
- What is the highest autumn temperature anomalies recorded in Heard Island and McDonald Islands?
- The highest recorded value was 0.9668 in 2025.
- What is the lowest autumn temperature anomalies recorded in Heard Island and McDonald Islands?
- The lowest recorded value was -2.89 in 1941.
- How does Heard Island and McDonald Islands rank for autumn temperature anomalies?
- Heard Island and McDonald Islands ranks 56th out of 193 countries with data for 2025.
- Is autumn temperature anomalies rising or falling in Heard Island and McDonald Islands?
- Over the last ten years it is up 549.3%. The long-run trend across the full record is volatile.
- Where does this Heard Island and McDonald Islands data come from?
- The figures come from Our World in Data, published as part of Autumn temperature anomalies. 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).