Annual temperature anomalies in Sierra Leone
Sierra Leone: Annual temperature anomalies was 0.5829 °C in 2025. ◆ Volatile
Latest (2025)
0.5829 °C
Change on year
down 48.7%
World rank
108th
of 193 countries
All-time high
1.14 °C
in 2024
All-time low
-1.18 °C
in 1954
Years of data
86
1940–2025
Annual temperature 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 °C.
Analysis
Sierra Leone recorded 0.5829 °C for annual temperature anomalies in 2025.
The figure is down 48.7% on the previous year and up 1,307.4% over ten years.
Over the whole period, annual temperature anomalies in Sierra Leone peaked at 1.14 °C in 2024 and was at its lowest, -1.18 °C, in 1954.
That places Sierra Leone 108th out of 193 countries with data for 2025, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Annual temperature anomalies in Sierra Leone, year by year
| Year | °C | Change |
|---|---|---|
| 1940 | -0.9763 °C | — |
| 1941 | -0.784 °C | -19.7% |
| 1942 | -1.03 °C | +31.4% |
| 1943 | -1.18 °C | +14.2% |
| 1944 | -1.09 °C | -7.0% |
| 1945 | -0.7928 °C | -27.5% |
| 1946 | -0.9128 °C | +15.1% |
| 1947 | -0.5247 °C | -42.5% |
| 1948 | -0.6974 °C | +32.9% |
| 1949 | -0.7188 °C | +3.1% |
| 1950 | -0.8524 °C | +18.6% |
| 1951 | -0.9016 °C | +5.8% |
| 1952 | -0.623 °C | -30.9% |
| 1953 | -0.4815 °C | -22.7% |
| 1954 | -1.18 °C | +144.9% |
| 1955 | -1.04 °C | -11.9% |
| 1956 | -1.18 °C | +13.4% |
| 1957 | -1.05 °C | -11.2% |
| 1958 | -0.8831 °C | -15.6% |
| 1959 | -0.6066 °C | -31.3% |
| 1960 | -0.4791 °C | -21.0% |
| 1961 | -0.4962 °C | +3.6% |
| 1962 | -0.6406 °C | +29.1% |
| 1963 | -0.3658 °C | -42.9% |
| 1964 | -0.554 °C | +51.4% |
| 1965 | -0.7222 °C | +30.4% |
| 1966 | -0.2927 °C | -59.5% |
| 1967 | -0.6289 °C | +114.9% |
| 1968 | -0.5248 °C | -16.6% |
| 1969 | -0.5114 °C | -2.6% |
| 1970 | -0.3454 °C | -32.4% |
| 1971 | -0.6922 °C | +100.4% |
| 1972 | -0.355 °C | -48.7% |
| 1973 | 0.1728 °C | -148.7% |
| 1974 | -0.4239 °C | -345.3% |
| 1975 | -0.4166 °C | -1.7% |
| 1976 | -0.7452 °C | +78.9% |
| 1977 | -0.1593 °C | -78.6% |
| 1978 | -0.413 °C | +159.3% |
| 1979 | -0.0546 °C | -86.8% |
| 1980 | -0.1973 °C | +261.2% |
| 1981 | -0.3113 °C | +57.8% |
| 1982 | -0.3335 °C | +7.1% |
| 1983 | 0.0329 °C | -109.9% |
| 1984 | -0.205 °C | -722.5% |
| 1985 | -0.2295 °C | +11.9% |
| 1986 | -0.2079 °C | -9.4% |
| 1987 | 0.4031 °C | -293.9% |
| 1988 | 0.1595 °C | -60.4% |
| 1989 | -0.0264 °C | -116.6% |
| 1990 | -0.1324 °C | +400.9% |
| 1991 | -0.2575 °C | +94.5% |
| 1992 | -0.5493 °C | +113.4% |
| 1993 | -0.3692 °C | -32.8% |
| 1994 | -0.416 °C | +12.7% |
| 1995 | -0.1144 °C | -72.5% |
| 1996 | -0.1736 °C | +51.7% |
| 1997 | -0.0724 °C | -58.3% |
| 1998 | 0.3671 °C | -607.3% |
| 1999 | -0.2041 °C | -155.6% |
| 2000 | -0.3539 °C | +73.4% |
| 2001 | -0.2017 °C | -43.0% |
| 2002 | 0.0123 °C | -106.1% |
| 2003 | 0.0714 °C | +482.9% |
| 2004 | -0.0296 °C | -141.5% |
| 2005 | -0.0726 °C | +145.0% |
| 2006 | 0.0865 °C | -219.0% |
| 2007 | 0.0598 °C | -30.9% |
| 2008 | -0.1884 °C | -415.2% |
| 2009 | 0.1209 °C | -164.2% |
| 2010 | 0.09 °C | -25.6% |
| 2011 | -0.1648 °C | -283.2% |
| 2012 | -0.2244 °C | +36.1% |
| 2013 | 0.0527 °C | -123.5% |
| 2014 | -0.0965 °C | -283.2% |
| 2015 | 0.0414 °C | -142.9% |
| 2016 | 0.3981 °C | +861.2% |
| 2017 | 0.5355 °C | +34.5% |
| 2018 | 0.3258 °C | -39.1% |
| 2019 | 0.6481 °C | +98.9% |
| 2020 | 0.679 °C | +4.8% |
| 2021 | 0.6527 °C | -3.9% |
| 2022 | 0.4935 °C | -24.4% |
| 2023 | 0.6655 °C | +34.9% |
| 2024 | 1.14 °C | +70.8% |
| 2025 | 0.5829 °C | -48.7% |
Sierra Leone compared with similar countries
- Sierra Leone's 0.5829 °C is below the median for low income countries, which is 0.6145 °C, 95% of the median. (25 countries reporting)
- Sierra Leone's 0.5829 °C is above the median for Sub-Saharan Africa, which is 0.5364 °C, 1.1× the median. (48 countries reporting)
Biggest year-on-year movements
Years where Annual temperature 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 |
|---|---|---|---|
| 2016 | +861.2% | 0.0414 °C | 0.3981 °C |
| 1984 | -722.5% | 0.0329 °C | -0.205 °C |
| 1998 | +607.3% | -0.0724 °C | 0.3671 °C |
| 2003 | +482.9% | 0.0123 °C | 0.0714 °C |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -0.8707 °C | -1.18 °C | -0.5247 °C | 10 |
| 1950s | -0.8792 °C | -1.18 °C | -0.4815 °C | 10 |
| 1960s | -0.5216 °C | -0.7222 °C | -0.2927 °C | 10 |
| 1970s | -0.3432 °C | -0.7452 °C | 0.1728 °C | 10 |
| 1980s | -0.0915 °C | -0.3335 °C | 0.4031 °C | 10 |
| 1990s | -0.1922 °C | -0.5493 °C | 0.3671 °C | 10 |
| 2000s | -0.0495 °C | -0.3539 °C | 0.1209 °C | 10 |
| 2010s | 0.1606 °C | -0.2244 °C | 0.6481 °C | 10 |
| 2020s | 0.7017 °C | 0.4935 °C | 1.14 °C | 6 |
Countries ranked near Sierra Leone
More reference data data for Sierra Leone
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0238 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.4498 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.5935 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.12 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.5935 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0797 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.044 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 1.91 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 2.72 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 0.6534 (2050)
Frequently asked questions
- What is annual temperature anomalies in Sierra Leone?
- Annual temperature anomalies in Sierra Leone was 0.5829 °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 Sierra Leone?
- The highest recorded value was 1.14 °C in 2024.
- What is the lowest annual temperature anomalies recorded in Sierra Leone?
- The lowest recorded value was -1.18 °C in 1954.
- How does Sierra Leone rank for annual temperature anomalies?
- Sierra Leone ranks 108th out of 193 countries with data for 2025.
- Is annual temperature anomalies rising or falling in Sierra Leone?
- Over the last ten years it is up 1,307.4%. 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 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.