Summer temperature anomalies in Heard Island and McDonald Islands
Heard Island and McDonald Islands: Summer temperature anomalies was 1.56 in 2026. ◆ Volatile
Summer temperature anomalies in Heard Island and McDonald Islands, 1940–2026
Source: Our World in Data.
Analysis
In 2026, summer temperature anomalies in Heard Island and McDonald Islands stood at 1.56. That is the highest value across all 87 years on record.
That represents a change of up 174.8% on the previous year and up 131.8% over ten years.
Over the whole period, summer temperature anomalies in Heard Island and McDonald Islands peaked at 1.56 in 2026 and was at its lowest, -1.37, in 1975.
Heard Island and McDonald Islands ranks 40th of 193 countries on this measure, in the top quarter.
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 | -0.4048 | -1.35 | 0.4259 | 10 |
| 1950s | -0.5305 | -1.28 | 0.5322 | 10 |
| 1960s | -0.5264 | -0.8416 | -0.0512 | 10 |
| 1970s | -0.4885 | -1.37 | 0.1959 | 10 |
| 1980s | -0.0351 | -0.6673 | 0.8376 | 10 |
| 1990s | -0.0294 | -0.7248 | 0.3899 | 10 |
| 2000s | -0.2336 | -1.26 | 0.5923 | 10 |
| 2010s | 0.2475 | -0.5868 | 1.09 | 10 |
| 2020s | 0.5671 | -0.0583 | 1.56 | 7 |
Countries ranked near Heard Island and McDonald Islands
More reference data data for Heard Island and McDonald Islands
- 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)
- Autumn temperature anomalies 0.9668 (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 summer temperature anomalies in Heard Island and McDonald Islands?
- Summer temperature anomalies in Heard Island and McDonald Islands was 1.56 in 2026, according to Our World in Data.
- What is the highest summer temperature anomalies recorded in Heard Island and McDonald Islands?
- The highest recorded value was 1.56 in 2026.
- What is the lowest summer temperature anomalies recorded in Heard Island and McDonald Islands?
- The lowest recorded value was -1.37 in 1975.
- How does Heard Island and McDonald Islands rank for summer temperature anomalies?
- Heard Island and McDonald Islands ranks 40th out of 193 countries with data for 2026.
- Is summer temperature anomalies rising or falling in Heard Island and McDonald Islands?
- Over the last ten years it is up 131.8%. 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 Summer temperature anomalies. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 87 observations, free to reuse under CC BY 4.0 (Our World in Data).