Average annual surface temperature in Sierra Leone
Sierra Leone: Average annual surface temperature was 26.31 °C in 2025. ▲ Rising
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.
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
- Spring temperature anomalies 0.1247 °C (2026)
- Summer temperature anomalies 0.8874 °C (2026)
- Temperature anomalies by month 0.2824 °C (2026)
- Universal right to vote in practice 2 (2025)
- Autumn temperature anomalies 0.1314 °C (2025)
- Winter temperature anomalies 0.1178 °C (2025)
- Consumer price index 771.75 2010 = 100 (2025)
- Universal right to vote 2 (2025)
- Competitive elections 0 (2025)
- Men's universal right to vote 1 (2025)
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
The temperature of the air measured 2 meters above the ground, encompassing land, sea, and in-land water surfaces.