Standardised Precipitation-Evapotranspiration Index in Iran
Iran: Standardised Precipitation-Evapotranspiration Index was -1.61 in 2023. ◆ Volatile
Standardised Precipitation-Evapotranspiration Index in Iran, 1960–2023
Source: Global SPEI database (SPEIbase). https://spei.csic.es/database.html.
Analysis
The most recent figure for standardised precipitation-evapotranspiration index in Iran is -1.61, measured in 2023.
That represents a change of up 11.1% on the previous year and down 37.7% over ten years.
Over the whole period, standardised precipitation-evapotranspiration index in Iran peaked at 2.69 in 1972 and was at its lowest, -2.57, in 2021.
That places Iran 170th out of 188 countries with data for 2023, putting it in the bottom 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 |
|---|---|---|---|---|
| 1960s | 0.1459 | -1.07 | 1.86 | 10 |
| 1970s | 0.3877 | -1.62 | 2.69 | 10 |
| 1980s | 0.1105 | -1.06 | 2.35 | 10 |
| 1990s | 0.1809 | -1.23 | 2.04 | 10 |
| 2000s | -1.07 | -2.09 | -0.14 | 10 |
| 2010s | -1.05 | -2.32 | 0.2892 | 10 |
| 2020s | -1.47 | -2.57 | 0.1352 | 4 |
Countries ranked near Iran
More environment data for Iran
- Total greenhouse gas emissions excluding LULUCF 1,055 Mt CO2e (2024)
- Total greenhouse gas emissions excluding LULUCF per capita 11.52 t CO2e/capita (2024)
- Methane (CH4) emissions from Agriculture 23.95 Mt CO2e (2024)
- Methane (CH4) emissions from Building (Energy) 1.36 Mt CO2e (2024)
- Methane (CH4) emissions from Fugitive Emissions (Energy) 132.92 Mt CO2e (2024)
- Methane (CH4) emissions from Industrial Combustion (Energy) 0.0799 Mt CO2e (2024)
- Methane (CH4) emissions (total) excluding LULUCF 175.7 Mt CO2e (2024)
- Methane (CH4) emissions from Power Industry (Energy) 0.3082 Mt CO2e (2024)
- Methane (CH4) emissions from Transport (Energy) 2.67 Mt CO2e (2024)
- Methane (CH4) emissions from Waste 13.99 Mt CO2e (2024)
Frequently asked questions
- What is standardised precipitation-evapotranspiration index in Iran?
- Standardised precipitation-evapotranspiration index in Iran was -1.61 in 2023, according to Global SPEI database (SPEIbase). https://spei.csic.es/database.html.
- What is the highest standardised precipitation-evapotranspiration index recorded in Iran?
- The highest recorded value was 2.69 in 1972.
- What is the lowest standardised precipitation-evapotranspiration index recorded in Iran?
- The lowest recorded value was -2.57 in 2021.
- How does Iran rank for standardised precipitation-evapotranspiration index?
- Iran ranks 170th out of 188 countries with data for 2023.
- Is standardised precipitation-evapotranspiration index rising or falling in Iran?
- Over the last ten years it is down 37.7%. The long-run trend across the full record is volatile.
- Where does this Iran data come from?
- The figures come from Global SPEI database (SPEIbase). https://spei.csic.es/database.html, published as part of Standardised Precipitation-Evapotranspiration Index. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 64 observations, free to reuse under CC BY 4.0 (World Bank Open Data).
About this data
The SPEI fulfills the requirements of a drought index since its multi-scalar character enables it to be used by different scientific disciplines to detect, monitor, and analyze droughts. Like the sc-PDSI and the SPI, the SPEI can measure drought severity according to its intensity and duration, and can identify the onset and end of drought episodes. The SPEI allows comparison of drought severity through time and space, since it can be calculated over a wide range of climates, as can the SPI.