Ireland vs United Kingdom: Standardised Precipitation-Evapotranspiration Index

Ireland
1.62
in 2023
United Kingdom
1.86
in 2023
Ireland rank
6th
United Kingdom rank
3rd

Standardised Precipitation-Evapotranspiration Index over time

  • Ireland
  • United Kingdom
-2-1012196019912023

How they compare

United Kingdom currently reports 1.86 against 1.62 in Ireland, a difference of 0.24.

That makes United Kingdom's figure about 1.2 times Ireland's.

The two have swapped places 33 times across 64 shared years of data; in 1960 it was Ireland ahead.

Ireland ranks 6th and United Kingdom ranks 3rd of 189 countries.

Across the 7 decades both report, Ireland averaged higher in 4 and United Kingdom in 3.

Head to head by decade

Decade Ireland United Kingdom Difference Ahead
1960s 0.2078 0.0869 0.1209 Ireland
1970s -0.5713 -0.5445 0.0268 United Kingdom
1980s 0.2325 0.2782 0.0456 United Kingdom
1990s 0.2289 0.0832 0.1457 Ireland
2000s 0.1259 0.2027 0.0768 United Kingdom
2010s 0.3706 0.2634 0.1072 Ireland
2020s 0.5844 0.5249 0.0595 Ireland

Averages of every year both report within each decade.

Frequently asked questions

Which has higher standardised precipitation-evapotranspiration index, Ireland or United Kingdom?
United Kingdom, at 1.86 against 1.62 in Ireland as of 2023.
What is the difference in standardised precipitation-evapotranspiration index between Ireland and United Kingdom?
0.24, with United Kingdom ahead.
How many years of comparable data are there for Ireland and United Kingdom?
64 years are reported by both, from 1960 to 2023.
How do Ireland and United Kingdom rank globally for standardised precipitation-evapotranspiration index?
Ireland ranks 6th and United Kingdom ranks 3rd of 189 countries.
Where does this data come from?
Global SPEI database (SPEIbase). https://spei.csic.es/database.html, published as Standardised Precipitation-Evapotranspiration Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Ireland vs United Kingdom: Standardised Precipitation-Evapotranspiration Index. Statizoid, drawing on Global SPEI database (SPEIbase). https://spei.csic.es/database.html. Retrieved 22 August 2026, from https://environment.statizoid.com/compare/standardised-precipitation-evapotranspiration-index/ireland/united-kingdom/

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About this data

Indicator
Standardised Precipitation-Evapotranspiration Index
Source
Global SPEI database (SPEIbase). https://spei.csic.es/database.html
Licence
CC BY 4.0 (World Bank Open Data)
Coverage
189 places, 12,095 data points, 1960–2023
Last refreshed

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.