Average Weather in Dakar Senegal
In Dakar, the temperature typically varies from 65°F to 88°F over the course of the year, and is rarely below 61°F or above 92°F.
The hot season lasts for 4.0 months, from July 14 to November 15, with an average daily high temperature above 86°F. The hottest day of the year is October 9, with an average high of 88°F and low of 78°F.
The cool season lasts for 4.5 months, from December 31 to May 16, with an average daily high temperature below 80°F. The coldest day of the year is February 4, with an average low of 65°F and high of 78°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
The length of the day in Dakar varies over the course of the year. In 2017, the shortest day is December 21, with 11 hours, 16 minutes of daylight; the longest day is June 21, with 12 hours, 60 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:39 AM on June 3, and the latest sunrise is 60 minutes later at 7:39 AM on January 22. The earliest sunset is at 6:37 PM on November 21, and the latest sunset is 1 hour, 6 minutes later at 7:43 PM on July 8.
Daylight saving time (DST) is not observed in Dakar during 2017.
Sunrise & Sunset with Twilight
In Dakar, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Dakar begins around November 30 and lasts for 7.5 months, ending around July 13. On May 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.
The cloudier part of the year begins around July 13 and lasts for 4.6 months, ending around November 30. On September 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 80% of the time, and clear, mostly clear, or partly cloudy 20% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Dakar varies very significantly throughout the year.
The wetter season lasts 2.4 months, from July 20 to October 2, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 59% on August 30.
The drier season lasts 9.6 months, from October 2 to July 20. The smallest chance of a wet day is 1% on April 9.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 59% on August 30.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day in the year. Dakar experiences very significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 4.2 months, from June 24 to October 30, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 26, with an average total accumulation of 5.1 inches.
The rainless period of the year lasts for 7.8 months, from October 30 to June 24. The least rain falls around April 17, with and average total accumulation of 0.0 inches.
Average Monthly Rainfall
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
Dakar experiences very significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 8.6 months, from March 31 to December 18, during which time the comfort level is muggy, oppressive, or miserable at least 30% of the time. The muggiest day of the year is September 2, with muggy conditions 100% of the time.
The least muggy day of the year is January 25, with muggy conditions 6% of the time.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Dakar experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.9 months, from November 8 to June 4, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 7.6 miles per hour.
The calmer time of year lasts for 5.1 months, from June 4 to November 8. The calmest day of the year is September 23, with an average hourly wind speed of 4.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Dakar varies throughout the year.
The wind is most often from the west for 3.3 months, from June 9 to September 19, with a peak percentage of 67% on July 8. The wind is most often from the north for 8.7 months, from September 19 to June 9, with a peak percentage of 95% on April 8.
Dakar is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 4.4 months, from July 5 to November 16, with an average temperature above 80°F. The day of the year with the warmest water is September 30, with an average temperature of 83°F.
The time of year with cooler water lasts for 3.9 months, from January 10 to May 6, with an average temperature below 70°F. The day of the year with the coolest water is February 28, with an average temperature of 67°F.
Average Water Temperature
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 3.1 months, from March 10 to June 14, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest day of the year is April 23, with an average of 7.2 kWh.
The darker period of the year lasts for 2.5 months, from August 10 to October 25, with an average daily incident shortwave energy per square meter below 5.0 kWh. The darkest day of the year is September 15, with an average of 4.4 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Dakar are 14.694 deg latitude, -17.444 deg longitude, and 20 ft elevation.
The topography within 2 miles of Dakar contains only modest variations in elevation, with a maximum elevation change of 157 feet, and an average elevation above sea level of 36 feet. Within 10 miles also contains only modest variations in elevation (325 feet). Within 50 miles contains significant variations in elevation (515 feet).
The area within 2 miles of Dakar is covered by artificial surfaces (71%) and water (21%), within 10 miles by water (81%) and artificial surfaces (14%), and within 50 miles by water (81%) and cropland (11%).
This report illustrates the typical weather in Dakar, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Dakar.
For each station, the records are corrected for the elevation difference between that station and Dakar according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Dakar is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Dakar and a given station.
The stations contributing to this reconstruction are: Léopold Sédar Senghor International Airport (98%, 7 kilometers, northwest), Kaolack Airport (1.0%, 162 kilometers, east), and Banjul International Airport (0.9%, 173 kilometers, southeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .