Average annual surface temperature in Sierra Leone
Sierra Leone: Average annual surface temperature was 26.31 in 2025. ▲ Rising
Latest (2025)
26.31
Change on year
down 2.1%
World rank
43rd
of 193 countries
All-time high
26.86
in 2024
All-time low
24.54
in 1954
Years of data
86
1940–2025
Average annual surface temperature in Sierra Leone, 1940–2025
Source: Our World in Data.
Analysis
The most recent figure for average annual surface temperature in Sierra Leone is 26.31, measured in 2025.
That represents a change of down 2.1% on the previous year and up 2.1% over ten years.
Over the whole period, average annual surface temperature in Sierra Leone peaked at 26.86 in 2024 and was at its lowest, 24.54, in 1954.
Sierra Leone ranks 43rd of 193 countries on this measure, in the top quarter.
The long-run direction has been consistently rising across the 86 years of available data.
Average annual surface temperature in Sierra Leone, year by year
| Year | Value | Change |
|---|---|---|
| 1940 | 24.75 | — |
| 1941 | 24.94 | +0.8% |
| 1942 | 24.69 | -1.0% |
| 1943 | 24.55 | -0.6% |
| 1944 | 24.63 | +0.3% |
| 1945 | 24.93 | +1.2% |
| 1946 | 24.81 | -0.5% |
| 1947 | 25.2 | +1.6% |
| 1948 | 25.03 | -0.7% |
| 1949 | 25 | -0.1% |
| 1950 | 24.87 | -0.5% |
| 1951 | 24.82 | -0.2% |
| 1952 | 25.1 | +1.1% |
| 1953 | 25.24 | +0.6% |
| 1954 | 24.54 | -2.8% |
| 1955 | 24.68 | +0.6% |
| 1956 | 24.54 | -0.6% |
| 1957 | 24.68 | +0.5% |
| 1958 | 24.84 | +0.7% |
| 1959 | 25.12 | +1.1% |
| 1960 | 25.24 | +0.5% |
| 1961 | 25.23 | -0.1% |
| 1962 | 25.08 | -0.6% |
| 1963 | 25.36 | +1.1% |
| 1964 | 25.17 | -0.7% |
| 1965 | 25 | -0.7% |
| 1966 | 25.43 | +1.7% |
| 1967 | 25.09 | -1.3% |
| 1968 | 25.2 | +0.4% |
| 1969 | 25.21 | +0.1% |
| 1970 | 25.38 | +0.7% |
| 1971 | 25.03 | -1.4% |
| 1972 | 25.37 | +1.3% |
| 1973 | 25.9 | +2.1% |
| 1974 | 25.3 | -2.3% |
| 1975 | 25.31 | +0.0% |
| 1976 | 24.98 | -1.3% |
| 1977 | 25.56 | +2.3% |
| 1978 | 25.31 | -1.0% |
| 1979 | 25.67 | +1.4% |
| 1980 | 25.53 | -0.6% |
| 1981 | 25.41 | -0.4% |
| 1982 | 25.39 | -0.1% |
| 1983 | 25.76 | +1.4% |
| 1984 | 25.52 | -0.9% |
| 1985 | 25.49 | -0.1% |
| 1986 | 25.51 | +0.1% |
| 1987 | 26.13 | +2.4% |
| 1988 | 25.88 | -0.9% |
| 1989 | 25.7 | -0.7% |
| 1990 | 25.59 | -0.4% |
| 1991 | 25.46 | -0.5% |
| 1992 | 25.17 | -1.1% |
| 1993 | 25.35 | +0.7% |
| 1994 | 25.31 | -0.2% |
| 1995 | 25.61 | +1.2% |
| 1996 | 25.55 | -0.2% |
| 1997 | 25.65 | +0.4% |
| 1998 | 26.09 | +1.7% |
| 1999 | 25.52 | -2.2% |
| 2000 | 25.37 | -0.6% |
| 2001 | 25.52 | +0.6% |
| 2002 | 25.73 | +0.8% |
| 2003 | 25.79 | +0.2% |
| 2004 | 25.69 | -0.4% |
| 2005 | 25.65 | -0.2% |
| 2006 | 25.81 | +0.6% |
| 2007 | 25.78 | -0.1% |
| 2008 | 25.53 | -1.0% |
| 2009 | 25.84 | +1.2% |
| 2010 | 25.81 | -0.1% |
| 2011 | 25.56 | -1.0% |
| 2012 | 25.5 | -0.2% |
| 2013 | 25.78 | +1.1% |
| 2014 | 25.63 | -0.6% |
| 2015 | 25.76 | +0.5% |
| 2016 | 26.12 | +1.4% |
| 2017 | 26.26 | +0.5% |
| 2018 | 26.05 | -0.8% |
| 2019 | 26.37 | +1.2% |
| 2020 | 26.4 | +0.1% |
| 2021 | 26.38 | -0.1% |
| 2022 | 26.22 | -0.6% |
| 2023 | 26.39 | +0.7% |
| 2024 | 26.86 | +1.8% |
| 2025 | 26.31 | -2.1% |
Sierra Leone compared with similar countries
- Sierra Leone's 26.31 is above the median for low income countries, which is 26.29, 1.0× the median. (25 countries reporting)
- Sierra Leone's 26.31 is above the median for Sub-Saharan Africa, which is 25.65, 1.0× the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | 24.85 | 24.55 | 25.2 | 10 |
| 1950s | 24.84 | 24.54 | 25.24 | 10 |
| 1960s | 25.2 | 25 | 25.43 | 10 |
| 1970s | 25.38 | 24.98 | 25.9 | 10 |
| 1980s | 25.63 | 25.39 | 26.13 | 10 |
| 1990s | 25.53 | 25.17 | 26.09 | 10 |
| 2000s | 25.67 | 25.37 | 25.84 | 10 |
| 2010s | 25.88 | 25.5 | 26.37 | 10 |
| 2020s | 26.42 | 26.22 | 26.86 | 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 average annual surface temperature in Sierra Leone?
- Average annual surface temperature in Sierra Leone was 26.31 in 2025, according to Our World in Data.
- What is the highest average annual surface temperature recorded in Sierra Leone?
- The highest recorded value was 26.86 in 2024.
- What is the lowest average annual surface temperature recorded in Sierra Leone?
- The lowest recorded value was 24.54 in 1954.
- How does Sierra Leone rank for average annual surface temperature?
- Sierra Leone ranks 43rd out of 193 countries with data for 2025.
- Is average annual surface temperature rising or falling in Sierra Leone?
- Over the last ten years it is up 2.1%. The long-run trend across the full record is rising.
- Where does this Sierra Leone data come from?
- The figures come from Our World in Data, published as part of Average annual surface temperature. 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).