Liberia’s average annual rainfall exceeds 2,500 mm. Rainfall is highest along the coast, but decreases towards Liberia’s interior plateaus and low mountains. Southern areas of the country receive rain year-round, while the rest of the country experiences two seasons due to the West African Monsoon. The wet season typically occurs in the summer months between May and November, with average temperature of 25°C. The dry season typically occurs in the winter months, December to April, with average temperatures between 24 to 27°C.
- Mean annual temperature has increased by 0.8˚C between 1960 and 2006, an average rate of 0.18˚C per decade.
- The average number of ‘hot nights’ per year increased by 57 between 1960 and 2003.
- ‘Cold nights’ have decreased by 18 days per year. This rate of decrease has been observed to be most rapid in March to May period.
- Mean annual temperature for the country is 25.5˚C, with monthly temperatures ranging between 23.9˚C (August) and 26.8 C (March) for 1901 - 2016.
- Mean annual rainfall over Liberia has decreased since 1960, however, it remains unclear if this is a long-term trend or due to the variability in rainfall for the region.
- Increased frequency of intense rainfall is expected.
- For 1901 - 2016, mean annual precipitation is 2,500 mm, and mean monthly precipitation of the country varies from 27 mm in January to 400 mm in September.
This section provides the options to visualize historical climate data for different timeframes via map and annual cycle chart.