Precipitation anomalies in Sierra Leone
Sierra Leone: Precipitation anomalies was 425.21 millimeters in 2025. ◆ Volatile
Latest (2025)
425.21 millimeters
Change on year
up 85.2%
World rank
7th
of 192 countries
All-time high
749.24 millimeters
in 1957
All-time low
-417.7 millimeters
in 1942
Years of data
86
1940–2025
Precipitation anomalies in Sierra Leone, 1940–2025
Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data. Measured in millimeters.
Analysis
Sierra Leone recorded 425.21 millimeters for precipitation anomalies in 2025.
The figure is up 85.2% on the previous year and up 275.3% over ten years.
Over the whole period, precipitation anomalies in Sierra Leone peaked at 749.24 millimeters in 1957 and was at its lowest, -417.7 millimeters, in 1942.
Sierra Leone ranks 7th of 192 countries on this measure, in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Precipitation anomalies in Sierra Leone, year by year
| Year | millimeters | Change |
|---|---|---|
| 1940 | -149.24 millimeters | — |
| 1941 | -86.13 millimeters | -42.3% |
| 1942 | -417.7 millimeters | +385.0% |
| 1943 | 21.92 millimeters | -105.2% |
| 1944 | 202.67 millimeters | +824.6% |
| 1945 | -331.31 millimeters | -263.5% |
| 1946 | -201.59 millimeters | -39.2% |
| 1947 | -43.55 millimeters | -78.4% |
| 1948 | -278.31 millimeters | +539.1% |
| 1949 | -19.23 millimeters | -93.1% |
| 1950 | 43.37 millimeters | -325.5% |
| 1951 | 477.4 millimeters | +1000.9% |
| 1952 | 576.63 millimeters | +20.8% |
| 1953 | 209.23 millimeters | -63.7% |
| 1954 | 404.24 millimeters | +93.2% |
| 1955 | 227.17 millimeters | -43.8% |
| 1956 | 122.9 millimeters | -45.9% |
| 1957 | 749.24 millimeters | +509.6% |
| 1958 | -66.91 millimeters | -108.9% |
| 1959 | -92.42 millimeters | +38.1% |
| 1960 | -29.15 millimeters | -68.5% |
| 1961 | 117.03 millimeters | -501.5% |
| 1962 | -50.36 millimeters | -143.0% |
| 1963 | 219.27 millimeters | -535.4% |
| 1964 | -193.22 millimeters | -188.1% |
| 1965 | -178.74 millimeters | -7.5% |
| 1966 | 17.51 millimeters | -109.8% |
| 1967 | 340.22 millimeters | +1842.6% |
| 1968 | 512.64 millimeters | +50.7% |
| 1969 | 593.57 millimeters | +15.8% |
| 1970 | 215.72 millimeters | -63.7% |
| 1971 | 293.61 millimeters | +36.1% |
| 1972 | 432.62 millimeters | +47.3% |
| 1973 | -39.55 millimeters | -109.1% |
| 1974 | -101.93 millimeters | +157.7% |
| 1975 | -16.32 millimeters | -84.0% |
| 1976 | 137.61 millimeters | -943.4% |
| 1977 | 50.9 millimeters | -63.0% |
| 1978 | 210.9 millimeters | +314.3% |
| 1979 | 338.08 millimeters | +60.3% |
| 1980 | 665.15 millimeters | +96.7% |
| 1981 | 359.94 millimeters | -45.9% |
| 1982 | -32.82 millimeters | -109.1% |
| 1983 | -177.57 millimeters | +441.1% |
| 1984 | -74.03 millimeters | -58.3% |
| 1985 | 20.64 millimeters | -127.9% |
| 1986 | -92.47 millimeters | -548.1% |
| 1987 | -31.49 millimeters | -65.9% |
| 1988 | 110.45 millimeters | -450.7% |
| 1989 | 228.47 millimeters | +106.9% |
| 1990 | 5.2 millimeters | -97.7% |
| 1991 | -281.56 millimeters | -5517.1% |
| 1992 | 76.49 millimeters | -127.2% |
| 1993 | 156.34 millimeters | +104.4% |
| 1994 | -28.71 millimeters | -118.4% |
| 1995 | 52.12 millimeters | -281.5% |
| 1996 | 52.26 millimeters | +0.3% |
| 1997 | -171.94 millimeters | -429.0% |
| 1998 | -187.23 millimeters | +8.9% |
| 1999 | -164.09 millimeters | -12.4% |
| 2000 | 63.37 millimeters | -138.6% |
| 2001 | -104.6 millimeters | -265.1% |
| 2002 | 16.7 millimeters | -116.0% |
| 2003 | 169.8 millimeters | +916.9% |
| 2004 | 32.67 millimeters | -80.8% |
| 2005 | 124.47 millimeters | +281.0% |
| 2006 | -135.92 millimeters | -209.2% |
| 2007 | 119.04 millimeters | -187.6% |
| 2008 | -81.29 millimeters | -168.3% |
| 2009 | -257.45 millimeters | +216.7% |
| 2010 | 27.59 millimeters | -110.7% |
| 2011 | -161.06 millimeters | -683.8% |
| 2012 | 186.9 millimeters | -216.0% |
| 2013 | -259.64 millimeters | -238.9% |
| 2014 | -53.4 millimeters | -79.4% |
| 2015 | -242.61 millimeters | +354.4% |
| 2016 | 190.84 millimeters | -178.7% |
| 2017 | 89.28 millimeters | -53.2% |
| 2018 | 174.55 millimeters | +95.5% |
| 2019 | 479.95 millimeters | +175.0% |
| 2020 | 117.13 millimeters | -75.6% |
| 2021 | 127.99 millimeters | +9.3% |
| 2022 | 78.99 millimeters | -38.3% |
| 2023 | 30.69 millimeters | -61.1% |
| 2024 | 229.55 millimeters | +647.9% |
| 2025 | 425.21 millimeters | +85.2% |
Sierra Leone compared with similar countries
- Sierra Leone's 425.21 millimeters is above the median for low income countries, which is -67.27 millimeters. (25 countries reporting)
- Sierra Leone's 425.21 millimeters is above the median for Sub-Saharan Africa, which is -73.9 millimeters. (48 countries reporting)
Biggest year-on-year movements
Years where Precipitation anomalies 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.
| Year | Change | From | To |
|---|---|---|---|
| 1991 | -5517.1% | 5.2 millimeters | -281.56 millimeters |
| 1967 | +1842.6% | 17.51 millimeters | 340.22 millimeters |
| 1951 | +1000.9% | 43.37 millimeters | 477.4 millimeters |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -130.25 millimeters | -417.7 millimeters | 202.67 millimeters | 10 |
| 1950s | 265.08 millimeters | -92.42 millimeters | 749.24 millimeters | 10 |
| 1960s | 134.88 millimeters | -193.22 millimeters | 593.57 millimeters | 10 |
| 1970s | 152.17 millimeters | -101.93 millimeters | 432.62 millimeters | 10 |
| 1980s | 97.62 millimeters | -177.57 millimeters | 665.15 millimeters | 10 |
| 1990s | -49.11 millimeters | -281.56 millimeters | 156.34 millimeters | 10 |
| 2000s | -5.32 millimeters | -257.45 millimeters | 169.8 millimeters | 10 |
| 2010s | 43.24 millimeters | -259.64 millimeters | 479.95 millimeters | 10 |
| 2020s | 168.26 millimeters | 30.69 millimeters | 425.21 millimeters | 6 |
Countries ranked near Sierra Leone
More climate change data for Sierra Leone
- Nutrient nitrogen N (total) — Synthetic fertilizers (Agricultural) 3.65 million kg (2050)
- Emissions from livestock — Emissions (CO2eq) 1,547 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from N2O 538.77 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from CH4 1,008 kt (2050)
- Emissions from livestock — Emissions 2.03 kt (2050)
- Emissions from livestock — Emissions 36.02 kt (2050)
- Emissions from crops — Emissions (CO2eq) 1,431 kt (2050)
- Emissions from crops — Emissions (CO2eq) from N2O 201.66 kt (2050)
- Emissions from crops — Emissions (CO2eq) from CH4 1,229 kt (2050)
- Emissions from crops — Emissions 0.761 kt (2050)
Frequently asked questions
- What is precipitation anomalies in Sierra Leone?
- Precipitation anomalies in Sierra Leone was 425.21 millimeters in 2025, according to Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data.
- What is the highest precipitation anomalies recorded in Sierra Leone?
- The highest recorded value was 749.24 millimeters in 1957.
- What is the lowest precipitation anomalies recorded in Sierra Leone?
- The lowest recorded value was -417.7 millimeters in 1942.
- How does Sierra Leone rank for precipitation anomalies?
- Sierra Leone ranks 7th out of 192 countries with data for 2025.
- Is precipitation anomalies rising or falling in Sierra Leone?
- Over the last ten years it is up 275.3%. The long-run trend across the full record is volatile.
- Where does this Sierra Leone 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 Precipitation 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 in a specific year's total precipitation—rain and snow—from the 1991–2020 average, measured in millimeters, excluding fog and dew.