Annual temperature anomalies in Iran
Iran: Annual temperature anomalies was 1.37 °C in 2025. ◆ Volatile
Latest (2025)
1.37 °C
Change on year
up 23.7%
World rank
15th
of 193 countries
All-time high
1.41 °C
in 2021
All-time low
-2.77 °C
in 1957
Years of data
86
1940–2025
Annual temperature anomalies in Iran, 1940–2025
Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data. Measured in °C.
Analysis
The most recent figure for annual temperature anomalies in Iran is 1.37 °C, measured in 2025.
The figure is up 23.7% on the previous year and up 86.7% over ten years.
Over the whole period, annual temperature anomalies in Iran peaked at 1.41 °C in 2021 and was at its lowest, -2.77 °C, in 1957.
Iran ranks 15th of 193 countries on this measure, in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Annual temperature anomalies in Iran, year by year
| Year | °C | Change |
|---|---|---|
| 1940 | -1.17 °C | — |
| 1941 | -0.1652 °C | -85.9% |
| 1942 | -0.3223 °C | +95.1% |
| 1943 | -1.43 °C | +342.6% |
| 1944 | -0.9125 °C | -36.0% |
| 1945 | -1.6 °C | +75.6% |
| 1946 | -1.41 °C | -11.9% |
| 1947 | -0.9825 °C | -30.4% |
| 1948 | -1.57 °C | +60.0% |
| 1949 | -2.34 °C | +49.1% |
| 1950 | -2.04 °C | -13.1% |
| 1951 | -1.32 °C | -35.3% |
| 1952 | -1.49 °C | +13.4% |
| 1953 | -1.64 °C | +9.9% |
| 1954 | -1.62 °C | -1.4% |
| 1955 | -0.9668 °C | -40.3% |
| 1956 | -1.72 °C | +77.8% |
| 1957 | -2.77 °C | +61.3% |
| 1958 | -0.6385 °C | -77.0% |
| 1959 | -1.6 °C | +149.9% |
| 1960 | -1.21 °C | -24.3% |
| 1961 | -1.63 °C | +35.1% |
| 1962 | -1.36 °C | -16.8% |
| 1963 | -0.8379 °C | -38.3% |
| 1964 | -2.25 °C | +168.5% |
| 1965 | -1.22 °C | -45.7% |
| 1966 | -0.4842 °C | -60.3% |
| 1967 | -1.74 °C | +258.8% |
| 1968 | -1.44 °C | -17.3% |
| 1969 | -1.35 °C | -5.7% |
| 1970 | -0.391 °C | -71.1% |
| 1971 | -0.9281 °C | +137.4% |
| 1972 | -2.56 °C | +175.4% |
| 1973 | -0.9848 °C | -61.5% |
| 1974 | -1.9 °C | +92.6% |
| 1975 | -1.52 °C | -20.1% |
| 1976 | -1.61 °C | +6.4% |
| 1977 | -0.584 °C | -63.8% |
| 1978 | -0.7886 °C | +35.0% |
| 1979 | -1.02 °C | +29.6% |
| 1980 | -0.7099 °C | -30.6% |
| 1981 | -1.11 °C | +56.7% |
| 1982 | -2.47 °C | +122.2% |
| 1983 | -1.72 °C | -30.5% |
| 1984 | -1.91 °C | +11.3% |
| 1985 | -1.28 °C | -32.9% |
| 1986 | -2.02 °C | +57.3% |
| 1987 | -0.8987 °C | -55.4% |
| 1988 | -0.815 °C | -9.3% |
| 1989 | -1.29 °C | +58.2% |
| 1990 | -0.6017 °C | -53.3% |
| 1991 | -0.9267 °C | +54.0% |
| 1992 | -2.15 °C | +132.4% |
| 1993 | -1.16 °C | -46.2% |
| 1994 | -0.5355 °C | -53.8% |
| 1995 | -0.5139 °C | -4.0% |
| 1996 | -0.8512 °C | +65.6% |
| 1997 | -0.7402 °C | -13.0% |
| 1998 | 0.1035 °C | -114.0% |
| 1999 | 0.1449 °C | +40.1% |
| 2000 | 0.0292 °C | -79.9% |
| 2001 | 0.6844 °C | +2244.3% |
| 2002 | 0.246 °C | -64.1% |
| 2003 | -0.0098 °C | -104.0% |
| 2004 | 0.2177 °C | -2320.4% |
| 2005 | -0.07 °C | -132.2% |
| 2006 | 0.2853 °C | -507.5% |
| 2007 | -0.208 °C | -172.9% |
| 2008 | 0.0357 °C | -117.2% |
| 2009 | 0.1532 °C | +329.2% |
| 2010 | 1.16 °C | +658.3% |
| 2011 | 0.0476 °C | -95.9% |
| 2012 | -0.1811 °C | -480.3% |
| 2013 | 0.369 °C | -303.8% |
| 2014 | 0.0669 °C | -81.9% |
| 2015 | 0.735 °C | +999.2% |
| 2016 | 0.8412 °C | +14.5% |
| 2017 | 0.6877 °C | -18.3% |
| 2018 | 1.13 °C | +64.0% |
| 2019 | 0.4055 °C | -64.0% |
| 2020 | 0.0059 °C | -98.5% |
| 2021 | 1.41 °C | +23710.5% |
| 2022 | 1.2 °C | -15.1% |
| 2023 | 1.36 °C | +14.0% |
| 2024 | 1.11 °C | -18.7% |
| 2025 | 1.37 °C | +23.7% |
Iran compared with similar countries
- Iran's 1.37 °C is above the median for upper middle income countries, which is 0.7693 °C, 1.8× the median. (50 countries reporting)
- Iran's 1.37 °C is above the median for Middle East, North Africa, Afghanistan & Pakistan, which is 0.8554 °C, 1.6× the median. (22 countries reporting)
Biggest year-on-year movements
Years where Annual temperature anomalies in Iran 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 |
|---|---|---|---|
| 2021 | +23710.5% | 0.0059 °C | 1.41 °C |
| 2004 | +2320.4% | -0.0098 °C | 0.2177 °C |
| 2001 | +2244.3% | 0.0292 °C | 0.6844 °C |
| 2015 | +999.2% | 0.0669 °C | 0.735 °C |
| 2010 | +658.3% | 0.1532 °C | 1.16 °C |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -1.19 °C | -2.34 °C | -0.1652 °C | 10 |
| 1950s | -1.58 °C | -2.77 °C | -0.6385 °C | 10 |
| 1960s | -1.35 °C | -2.25 °C | -0.4842 °C | 10 |
| 1970s | -1.23 °C | -2.56 °C | -0.391 °C | 10 |
| 1980s | -1.42 °C | -2.47 °C | -0.7099 °C | 10 |
| 1990s | -0.7233 °C | -2.15 °C | 0.1449 °C | 10 |
| 2000s | 0.1364 °C | -0.208 °C | 0.6844 °C | 10 |
| 2010s | 0.5261 °C | -0.1811 °C | 1.16 °C | 10 |
| 2020s | 1.08 °C | 0.0059 °C | 1.41 °C | 6 |
Countries ranked near Iran
More reference data data for Iran
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 3.47 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 12.01 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 26.62 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 1.34 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 26.62 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 11.62 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 3.84 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 46.54 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 109.46 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 7.3 (2050)
Frequently asked questions
- What is annual temperature anomalies in Iran?
- Annual temperature anomalies in Iran was 1.37 °C in 2025, according to Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data.
- What is the highest annual temperature anomalies recorded in Iran?
- The highest recorded value was 1.41 °C in 2021.
- What is the lowest annual temperature anomalies recorded in Iran?
- The lowest recorded value was -2.77 °C in 1957.
- How does Iran rank for annual temperature anomalies?
- Iran ranks 15th out of 193 countries with data for 2025.
- Is annual temperature anomalies rising or falling in Iran?
- Over the last ten years it is up 86.7%. The long-run trend across the full record is volatile.
- Where does this Iran 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 Annual 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).
About this data
Difference of a specific year's average surface temperature from the 1991-2020 mean, in degrees Celsius.