Exposure to extreme precipitation — Annual precipitation change in Sierra Leone

Sierra Leone: Exposure to extreme precipitation — Annual precipitation change was 24.08 Millimetres per year in 2023. ◆ Volatile

Latest (2023)
24.08 Millimetres per year
Change on year
down 79.1%
World rank
92nd
of 222 countries
All-time high
659.39 Millimetres per year
in 1980
All-time low
-259.31 Millimetres per year
in 1991
Years of data
45
1979–2023

Exposure to extreme precipitation — Annual precipitation change in Sierra Leone, 1979–2023

-20002004006001979200120231979: 351.9 Millimetres per year1980: 659.4 Millimetres per year1981: 371.8 Millimetres per year1982: -28.2 Millimetres per year1983: -142.5 Millimetres per year1984: -64.5 Millimetres per year1985: 25.2 Millimetres per year1986: -93.5 Millimetres per year1987: -30.8 Millimetres per year1988: 111.7 Millimetres per year1989: 207.1 Millimetres per year1990: 19 Millimetres per year1991: -259.3 Millimetres per year1992: 110.8 Millimetres per year1993: 117.6 Millimetres per year1994: -16.7 Millimetres per year1995: 39.1 Millimetres per year1996: 33.2 Millimetres per year1997: -198.8 Millimetres per year1998: -171.8 Millimetres per year1999: -156.2 Millimetres per year2000: 83.6 Millimetres per year2001: -79.7 Millimetres per year2002: 43.6 Millimetres per year2003: 169.5 Millimetres per year2004: 29.1 Millimetres per year2005: 136.8 Millimetres per year2006: -137.1 Millimetres per year2007: 137.3 Millimetres per year2008: -57.6 Millimetres per year2009: -245.8 Millimetres per year2010: 47.1 Millimetres per year2011: -182 Millimetres per year2012: 178.2 Millimetres per year2013: -231.5 Millimetres per year2014: -22 Millimetres per year2015: -199.5 Millimetres per year2016: 211.9 Millimetres per year2017: 140.9 Millimetres per year2018: 192.9 Millimetres per year2019: 456.2 Millimetres per year2020: 84.9 Millimetres per year2021: 127 Millimetres per year2022: 115.3 Millimetres per year2023: 24.1 Millimetres per year

Source: Organisation for Economic Co-operation and Development. Measured in Millimetres per year.

Analysis

In 2023, exposure to extreme precipitation — annual precipitation change in Sierra Leone stood at 24.08 Millimetres per year.

The figure is down 79.1% on the previous year and up 110.4% over ten years.

Over the whole period, exposure to extreme precipitation — annual precipitation change in Sierra Leone peaked at 659.39 Millimetres per year in 1980 and was at its lowest, -259.31 Millimetres per year, in 1991.

That places Sierra Leone 92nd out of 222 countries with data for 2023, putting it in the middle of the range.

The series is highly variable year to year, so single readings are best treated with caution.

Exposure to extreme precipitation — Annual precipitation change in Sierra Leone, year by year

Annual values for Exposure to extreme precipitation — Annual precipitation change in Sierra Leone, 1979 to 2023.
Year Millimetres per year Change
1979 351.9 Millimetres per year —
1980 659.39 Millimetres per year +87.4%
1981 371.79 Millimetres per year -43.6%
1982 -28.23 Millimetres per year -107.6%
1983 -142.53 Millimetres per year +404.9%
1984 -64.53 Millimetres per year -54.7%
1985 25.2 Millimetres per year -139.0%
1986 -93.48 Millimetres per year -471.0%
1987 -30.83 Millimetres per year -67.0%
1988 111.7 Millimetres per year -462.3%
1989 207.11 Millimetres per year +85.4%
1990 18.99 Millimetres per year -90.8%
1991 -259.31 Millimetres per year -1465.4%
1992 110.78 Millimetres per year -142.7%
1993 117.64 Millimetres per year +6.2%
1994 -16.72 Millimetres per year -114.2%
1995 39.14 Millimetres per year -334.1%
1996 33.18 Millimetres per year -15.2%
1997 -198.77 Millimetres per year -699.1%
1998 -171.8 Millimetres per year -13.6%
1999 -156.18 Millimetres per year -9.1%
2000 83.56 Millimetres per year -153.5%
2001 -79.7 Millimetres per year -195.4%
2002 43.63 Millimetres per year -154.7%
2003 169.54 Millimetres per year +288.6%
2004 29.1 Millimetres per year -82.8%
2005 136.8 Millimetres per year +370.1%
2006 -137.15 Millimetres per year -200.3%
2007 137.33 Millimetres per year -200.1%
2008 -57.57 Millimetres per year -141.9%
2009 -245.78 Millimetres per year +326.9%
2010 47.1 Millimetres per year -119.2%
2011 -181.95 Millimetres per year -486.3%
2012 178.15 Millimetres per year -197.9%
2013 -231.53 Millimetres per year -230.0%
2014 -22.03 Millimetres per year -90.5%
2015 -199.54 Millimetres per year +805.8%
2016 211.87 Millimetres per year -206.2%
2017 140.92 Millimetres per year -33.5%
2018 192.86 Millimetres per year +36.9%
2019 456.22 Millimetres per year +136.6%
2020 84.86 Millimetres per year -81.4%
2021 126.95 Millimetres per year +49.6%
2022 115.34 Millimetres per year -9.2%
2023 24.08 Millimetres per year -79.1%

Sierra Leone compared with similar countries

  • Sierra Leone's 24.08 Millimetres per year is above the median for low income countries, which is -51.27 Millimetres per year. (21 countries reporting)
  • Sierra Leone's 24.08 Millimetres per year is above the median for Sub-Saharan Africa, which is -36.1 Millimetres per year. (39 countries reporting)

Biggest year-on-year movements

Years where Exposure to extreme precipitation — Annual precipitation change in Sierra Leone 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.

YearChange FromTo
1991 -1465.4% 18.99 Millimetres per year -259.31 Millimetres per year

Averages by decade

DecadeAverage LowestHighest Years
1970s 351.9 Millimetres per year 351.9 Millimetres per year 351.9 Millimetres per year 1
1980s 101.56 Millimetres per year -142.53 Millimetres per year 659.39 Millimetres per year 10
1990s -48.3 Millimetres per year -259.31 Millimetres per year 117.64 Millimetres per year 10
2000s 7.98 Millimetres per year -245.78 Millimetres per year 169.54 Millimetres per year 10
2010s 59.21 Millimetres per year -231.53 Millimetres per year 456.22 Millimetres per year 10
2020s 87.81 Millimetres per year 24.08 Millimetres per year 126.95 Millimetres per year 4

Countries ranked near Sierra Leone

  1. 89 Kazakhstan 26.74 Millimetres per year compare
  2. 90 Iraq 24.89 Millimetres per year compare
  3. 91 Bahrain 24.34 Millimetres per year compare
  4. 93 Dominica 23.44 Millimetres per year compare
  5. 94 Saudi Arabia 22.24 Millimetres per year compare
  6. 95 Ghana 20.08 Millimetres per year compare

See the full ranking of 979 places →

More reference data data for Sierra Leone

All data for Sierra Leone →

Frequently asked questions

What is exposure to extreme precipitation — annual precipitation change in Sierra Leone?
Exposure to extreme precipitation — annual precipitation change in Sierra Leone was 24.08 Millimetres per year in 2023, according to Organisation for Economic Co-operation and Development.
What is the highest exposure to extreme precipitation — annual precipitation change recorded in Sierra Leone?
The highest recorded value was 659.39 Millimetres per year in 1980.
What is the lowest exposure to extreme precipitation — annual precipitation change recorded in Sierra Leone?
The lowest recorded value was -259.31 Millimetres per year in 1991.
How does Sierra Leone rank for exposure to extreme precipitation — annual precipitation change?
Sierra Leone ranks 92nd out of 222 countries with data for 2023.
Is exposure to extreme precipitation — annual precipitation change rising or falling in Sierra Leone?
Over the last ten years it is up 110.4%. The long-run trend across the full record is volatile.
Where does this Sierra Leone data come from?
The figures come from Organisation for Economic Co-operation and Development, published as part of Exposure to extreme precipitation — Annual precipitation change. Statizoid updates them automatically from the source API.

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Exposure to extreme precipitation — Annual precipitation change in Sierra Leone. Statizoid, drawing on Organisation for Economic Co-operation and Development. Retrieved 06 October 2026, from https://reference.statizoid.com/stat/exposure-to-extreme-precipitation-annual-precipitation-change/sierra-leone/

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About this data

Indicator
Exposure to extreme precipitation — Annual precipitation change
Unit
Millimetres per year
Source
Organisation for Economic Co-operation and Development
Licence
OECD Terms and Conditions (attribution required)
Coverage
979 places, 44,055 data points, 1979–2023
Last refreshed

The dataset provides a global assessment of changes in average precipitation by providing the precipitation anomaly and provides a global assessment of extreme precipitation through the use of two precipitation indices, i.e. very heavy precipitation days and frequency of extreme precipitation events. Exposure indicators to extreme precipitation have been prepared jointly by the Organisation for Economic Co-operation and Development (OECD) and the International Energy Agency (IEA). Please see the working paper for a more complete description of the methods. The datasets span the period 1979-2022, depending on data availability and are the result of the use of a variety of geospatial data sources as referenced in the Working Paper. The dataset has a global coverage on a national level; on the sub-national TL2 level (i.e. large subnational regions) results are reported for all OECD countries as well as for Argentina, Brazil, China, India, Indonesia and South Africa. A number of aggregates are included: Euro area, European Union, Advanced economies, Emerging market economies, G7, G20, OECD, OECD Europe, OECD Asia Oceania, OECD Americas and the LAC region. Data source(s): Copernicus Climate Data Store precipitation data (ERA5) and Copernicus Climate Change Initiative land cover data. Contact: ENV.Stat@oecd.org Database documentation