Average annual surface temperature in Sierra Leone
Sierra Leone: Average annual surface temperature was 26.31 °C in 2025. ▲ Rising
Latest (2025)
26.31 °C
Change on year
down 2.1%
World rank
43rd
of 193 countries
All-time high
26.86 °C
in 2024
All-time low
24.54 °C
in 1954
Years of data
86
1940–2025
Average annual surface temperature 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
The most recent figure for average annual surface temperature in Sierra Leone is 26.31 °C, 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 °C in 2024 and was at its lowest, 24.54 °C, 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 | °C | Change |
|---|---|---|
| 1940 | 24.75 °C | — |
| 1941 | 24.94 °C | +0.8% |
| 1942 | 24.69 °C | -1.0% |
| 1943 | 24.55 °C | -0.6% |
| 1944 | 24.63 °C | +0.3% |
| 1945 | 24.93 °C | +1.2% |
| 1946 | 24.81 °C | -0.5% |
| 1947 | 25.2 °C | +1.6% |
| 1948 | 25.03 °C | -0.7% |
| 1949 | 25 °C | -0.1% |
| 1950 | 24.87 °C | -0.5% |
| 1951 | 24.82 °C | -0.2% |
| 1952 | 25.1 °C | +1.1% |
| 1953 | 25.24 °C | +0.6% |
| 1954 | 24.54 °C | -2.8% |
| 1955 | 24.68 °C | +0.6% |
| 1956 | 24.54 °C | -0.6% |
| 1957 | 24.68 °C | +0.5% |
| 1958 | 24.84 °C | +0.7% |
| 1959 | 25.12 °C | +1.1% |
| 1960 | 25.24 °C | +0.5% |
| 1961 | 25.23 °C | -0.1% |
| 1962 | 25.08 °C | -0.6% |
| 1963 | 25.36 °C | +1.1% |
| 1964 | 25.17 °C | -0.7% |
| 1965 | 25 °C | -0.7% |
| 1966 | 25.43 °C | +1.7% |
| 1967 | 25.09 °C | -1.3% |
| 1968 | 25.2 °C | +0.4% |
| 1969 | 25.21 °C | +0.1% |
| 1970 | 25.38 °C | +0.7% |
| 1971 | 25.03 °C | -1.4% |
| 1972 | 25.37 °C | +1.3% |
| 1973 | 25.9 °C | +2.1% |
| 1974 | 25.3 °C | -2.3% |
| 1975 | 25.31 °C | +0.0% |
| 1976 | 24.98 °C | -1.3% |
| 1977 | 25.56 °C | +2.3% |
| 1978 | 25.31 °C | -1.0% |
| 1979 | 25.67 °C | +1.4% |
| 1980 | 25.53 °C | -0.6% |
| 1981 | 25.41 °C | -0.4% |
| 1982 | 25.39 °C | -0.1% |
| 1983 | 25.76 °C | +1.4% |
| 1984 | 25.52 °C | -0.9% |
| 1985 | 25.49 °C | -0.1% |
| 1986 | 25.51 °C | +0.1% |
| 1987 | 26.13 °C | +2.4% |
| 1988 | 25.88 °C | -0.9% |
| 1989 | 25.7 °C | -0.7% |
| 1990 | 25.59 °C | -0.4% |
| 1991 | 25.46 °C | -0.5% |
| 1992 | 25.17 °C | -1.1% |
| 1993 | 25.35 °C | +0.7% |
| 1994 | 25.31 °C | -0.2% |
| 1995 | 25.61 °C | +1.2% |
| 1996 | 25.55 °C | -0.2% |
| 1997 | 25.65 °C | +0.4% |
| 1998 | 26.09 °C | +1.7% |
| 1999 | 25.52 °C | -2.2% |
| 2000 | 25.37 °C | -0.6% |
| 2001 | 25.52 °C | +0.6% |
| 2002 | 25.73 °C | +0.8% |
| 2003 | 25.79 °C | +0.2% |
| 2004 | 25.69 °C | -0.4% |
| 2005 | 25.65 °C | -0.2% |
| 2006 | 25.81 °C | +0.6% |
| 2007 | 25.78 °C | -0.1% |
| 2008 | 25.53 °C | -1.0% |
| 2009 | 25.84 °C | +1.2% |
| 2010 | 25.81 °C | -0.1% |
| 2011 | 25.56 °C | -1.0% |
| 2012 | 25.5 °C | -0.2% |
| 2013 | 25.78 °C | +1.1% |
| 2014 | 25.63 °C | -0.6% |
| 2015 | 25.76 °C | +0.5% |
| 2016 | 26.12 °C | +1.4% |
| 2017 | 26.26 °C | +0.5% |
| 2018 | 26.05 °C | -0.8% |
| 2019 | 26.37 °C | +1.2% |
| 2020 | 26.4 °C | +0.1% |
| 2021 | 26.38 °C | -0.1% |
| 2022 | 26.22 °C | -0.6% |
| 2023 | 26.39 °C | +0.7% |
| 2024 | 26.86 °C | +1.8% |
| 2025 | 26.31 °C | -2.1% |
Sierra Leone compared with similar countries
- Sierra Leone's 26.31 °C is above the median for low income countries, which is 26.29 °C, 1.0× the median. (25 countries reporting)
- Sierra Leone's 26.31 °C is above the median for Sub-Saharan Africa, which is 25.65 °C, 1.0× the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | 24.85 °C | 24.55 °C | 25.2 °C | 10 |
| 1950s | 24.84 °C | 24.54 °C | 25.24 °C | 10 |
| 1960s | 25.2 °C | 25 °C | 25.43 °C | 10 |
| 1970s | 25.38 °C | 24.98 °C | 25.9 °C | 10 |
| 1980s | 25.63 °C | 25.39 °C | 26.13 °C | 10 |
| 1990s | 25.53 °C | 25.17 °C | 26.09 °C | 10 |
| 2000s | 25.67 °C | 25.37 °C | 25.84 °C | 10 |
| 2010s | 25.88 °C | 25.5 °C | 26.37 °C | 10 |
| 2020s | 26.42 °C | 26.22 °C | 26.86 °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 average annual surface temperature in Sierra Leone?
- Average annual surface temperature in Sierra Leone was 26.31 °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 average annual surface temperature recorded in Sierra Leone?
- The highest recorded value was 26.86 °C in 2024.
- What is the lowest average annual surface temperature recorded in Sierra Leone?
- The lowest recorded value was 24.54 °C 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 Contains modified Copernicus Climate Change Service information (2026) – with major processing by 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).
About this data
Temperature of the air measured 2 meters above the ground, encompassing land, sea, and in-land water surfaces.