Temperature anomalies by month in Cook Islands
Cook Islands: Temperature anomalies by month was 0.3984 °C in 2026. ◆ Volatile
Temperature anomalies by month in Cook Islands, 1940–2026
Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data. Measured in °C.
Analysis
Cook Islands recorded 0.3984 °C for temperature anomalies by month in 2026.
The figure is down 15.6% on the previous year and up 257.7% over ten years.
Over the whole period, temperature anomalies by month in Cook Islands peaked at 1.03 °C in 2017 and was at its lowest, -1.51 °C, in 1940.
That places Cook Islands 81st out of 193 countries with data for 2026, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Temperature anomalies by month in Cook Islands, year by year
| Year | °C | Change |
|---|---|---|
| 1940 | -1.51 °C | — |
| 1941 | -0.3986 °C | -73.5% |
| 1942 | -0.2387 °C | -40.1% |
| 1943 | -0.5813 °C | +143.6% |
| 1944 | -0.3251 °C | -44.1% |
| 1945 | -0.6791 °C | +108.8% |
| 1946 | 0.1134 °C | -116.7% |
| 1947 | -0.3623 °C | -419.6% |
| 1948 | -0.6033 °C | +66.5% |
| 1949 | -0.5865 °C | -2.8% |
| 1950 | -0.1847 °C | -68.5% |
| 1951 | -0.6509 °C | +252.4% |
| 1952 | 0.0519 °C | -108.0% |
| 1953 | 0.2313 °C | +345.8% |
| 1954 | -0.5019 °C | -317.0% |
| 1955 | -0.4024 °C | -19.8% |
| 1956 | -0.7872 °C | +95.6% |
| 1957 | -0.5072 °C | -35.6% |
| 1958 | -1.18 °C | +132.4% |
| 1959 | -0.8163 °C | -30.7% |
| 1960 | -0.1242 °C | -84.8% |
| 1961 | -0.1769 °C | +42.5% |
| 1962 | -0.5947 °C | +236.2% |
| 1963 | -0.2235 °C | -62.4% |
| 1964 | 0.2197 °C | -198.3% |
| 1965 | -0.7619 °C | -446.7% |
| 1966 | -0.223 °C | -70.7% |
| 1967 | -0.1068 °C | -52.1% |
| 1968 | -0.1784 °C | +67.1% |
| 1969 | -0.471 °C | +163.9% |
| 1970 | 0.2379 °C | -150.5% |
| 1971 | -0.3542 °C | -248.9% |
| 1972 | -0.344 °C | -2.9% |
| 1973 | -0.1729 °C | -49.7% |
| 1974 | 0.3814 °C | -320.6% |
| 1975 | -0.3877 °C | -201.7% |
| 1976 | -0.2885 °C | -25.6% |
| 1977 | -0.3632 °C | +25.9% |
| 1978 | -0.8376 °C | +130.6% |
| 1979 | -0.3641 °C | -56.5% |
| 1980 | -0.3886 °C | +6.7% |
| 1981 | -0.38 °C | -2.2% |
| 1982 | 0.4505 °C | -218.6% |
| 1983 | -1.14 °C | -352.5% |
| 1984 | 0.2385 °C | -121.0% |
| 1985 | -0.0957 °C | -140.1% |
| 1986 | -0.4307 °C | +350.1% |
| 1987 | -0.7549 °C | +75.3% |
| 1988 | -0.3407 °C | -54.9% |
| 1989 | -0.4825 °C | +41.6% |
| 1990 | -0.1065 °C | -77.9% |
| 1991 | 0.1115 °C | -204.7% |
| 1992 | -0.7223 °C | -747.7% |
| 1993 | -0.2526 °C | -65.0% |
| 1994 | 0.1433 °C | -156.7% |
| 1995 | -1.17 °C | -915.4% |
| 1996 | -0.2386 °C | -79.6% |
| 1997 | -0.2547 °C | +6.8% |
| 1998 | -0.4624 °C | +81.5% |
| 1999 | 0.3769 °C | -181.5% |
| 2000 | 0.0986 °C | -73.8% |
| 2001 | 0.2698 °C | +173.7% |
| 2002 | 0.1326 °C | -50.8% |
| 2003 | 0.5532 °C | +317.1% |
| 2004 | 0.2061 °C | -62.7% |
| 2005 | 0.7295 °C | +254.0% |
| 2006 | 0.1027 °C | -85.9% |
| 2007 | -0.4442 °C | -532.7% |
| 2008 | -0.5235 °C | +17.8% |
| 2009 | 0.5564 °C | -206.3% |
| 2010 | 0.118 °C | -78.8% |
| 2011 | -0.1368 °C | -215.9% |
| 2012 | -0.3114 °C | +127.7% |
| 2013 | -0.4255 °C | +36.6% |
| 2014 | 0.2643 °C | -162.1% |
| 2015 | -0.3985 °C | -250.8% |
| 2016 | -0.2527 °C | -36.6% |
| 2017 | 1.03 °C | -508.0% |
| 2018 | 0.1562 °C | -84.9% |
| 2019 | 0.5628 °C | +260.4% |
| 2020 | 0.1784 °C | -68.3% |
| 2021 | 0.7697 °C | +331.4% |
| 2022 | 0.3453 °C | -55.1% |
| 2023 | -0.5314 °C | -253.9% |
| 2024 | -0.0648 °C | -87.8% |
| 2025 | 0.4722 °C | -828.6% |
| 2026 | 0.3984 °C | -15.6% |
Biggest year-on-year movements
Years where Temperature anomalies by month in Cook Islands changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1995 | -915.4% | 0.1433 °C | -1.17 °C |
| 2025 | +828.6% | -0.0648 °C | 0.4722 °C |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -0.5168 °C | -1.51 °C | 0.1134 °C | 10 |
| 1950s | -0.4746 °C | -1.18 °C | 0.2313 °C | 10 |
| 1960s | -0.2641 °C | -0.7619 °C | 0.2197 °C | 10 |
| 1970s | -0.2493 °C | -0.8376 °C | 0.3814 °C | 10 |
| 1980s | -0.3321 °C | -1.14 °C | 0.4505 °C | 10 |
| 1990s | -0.2574 °C | -1.17 °C | 0.3769 °C | 10 |
| 2000s | 0.1681 °C | -0.5235 °C | 0.7295 °C | 10 |
| 2010s | 0.0607 °C | -0.4255 °C | 1.03 °C | 10 |
| 2020s | 0.224 °C | -0.5314 °C | 0.7697 °C | 7 |
Countries ranked near Cook Islands
- 78 Saint Vincent and the Grenadines 0.4204 °C compare
- 79 Kazakhstan 0.4141 °C compare
- 80 Seychelles 0.4096 °C compare
- 82 Solomon Islands 0.3882 °C compare
- 83 Sao Tome and Principe 0.385 °C compare
- 84 Portugal 0.3824 °C compare
More climate change data for Cook Islands
- Nutrient nitrogen N (total) — Synthetic fertilizers (Agricultural) 25,902 kg (2050)
- Emissions from livestock — Emissions (CO2eq) 35.8 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from N2O 5.43 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from CH4 30.36 kt (2050)
- Emissions from livestock — Emissions 0.0205 kt (2050)
- Emissions from livestock — Emissions 1.08 kt (2050)
- Emissions from crops — Emissions (CO2eq) 0.1325 kt (2050)
- Emissions from crops — Emissions (CO2eq) from N2O 0.1325 kt (2050)
- Emissions from crops — Emissions 0.0005 kt (2050)
- Synthetic Fertilizers — Emissions (CO2eq) 0.1325 kt (2050)
Frequently asked questions
- What is temperature anomalies by month in Cook Islands?
- Temperature anomalies by month in Cook Islands was 0.3984 °C in 2026, according to Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data.
- What is the highest temperature anomalies by month recorded in Cook Islands?
- The highest recorded value was 1.03 °C in 2017.
- What is the lowest temperature anomalies by month recorded in Cook Islands?
- The lowest recorded value was -1.51 °C in 1940.
- How does Cook Islands rank for temperature anomalies by month?
- Cook Islands ranks 81st out of 193 countries with data for 2026.
- Is temperature anomalies by month rising or falling in Cook Islands?
- Over the last ten years it is up 257.7%. The long-run trend across the full record is volatile.
- Where does this Cook 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 Temperature anomalies by month. 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).
About this data
Difference in a specific month's average surface temperature from the mean temperature of the same month during the period 1991-2020, measured in degrees Celsius.