This page presents Senegal's climate context for the current climatology, 1991-2020, derived from observed, historical data. Information should be used to build a strong understanding of current climate conditions in order to appreciate future climate scenarios and projected change. You can visualize data for the current climatology through spatial variation, the seasonal cycle, or as a time series. Analysis is available for both annual and seasonal data. Data presentation defaults to national-scale aggregation, however sub-national data aggregations can be accessed by clicking within a country, on a sub-national unit. Other historical climatologies can be selected from the Time Period dropdown list. Data for specific coordinates can be downloaded for in the Data Download page.
Two distinct seasons characterize Senegal’s climate: a dry season from roughly October to May and a rainy season from June to September. While the arid zones receive a rainfall total under 300 millimeters per year, the forested south receives an average of 1200 mm/year. Rainfall is highly variable both on the interannual and inter-decadal timescales. The average annual temperature for Senegal was 27.8°C for the period 1960-1990, with monthly averages in the hottest seasons of up to 35°C.
- An increase in minimum temperatures recorded between 1961 and 2010.
- An overall temperature increase ranging 0.58°C to 1.88°C was recorded during the same time period.
- Decrease in overall precipitation was recorded from 1951 to 2000.
- Statistically significant decreases of around 10 to 15 mm per decade have, however, been observed between 1960 and 2006 in the southern regions of Senegal (during the wet season of June through September). Unusually high rainfalls have occurred in the dry season in recent years (2000‐2006), but this has not been part of a consistent trend.
- Senegal has experienced a statistically significant decrease in wet season rainfall between 1960 and 2006, with the 500 mm isohyets regressing about 100 kilometers (km) to the south.