Average Weather in Mali Guinea

1. World
2. Guinea
3. Labe
4. Mali Prefecture
5. Mali

In Mali, the wet season is oppressive and overcast, the dry season is partly cloudy, and it is warm year round. Over the course of the year, the temperature typically varies from 55°F to 88°F and is rarely below 50°F or above 92°F.

The hot season lasts for 2.8 months, from February 21 to May 14, with an average daily high temperature above 85°F. The hottest day of the year is April 9, with an average high of 88°F and low of 66°F.

The cool season lasts for 2.9 months, from June 30 to September 28, with an average daily high temperature below 76°F. The coldest day of the year is December 3, with an average low of 55°F and high of 80°F.

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.

In Mali, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Mali begins around November 9 and lasts for 5.9 months, ending around May 5. On February 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 61% of the time, and overcast or mostly cloudy 39% of the time.

The cloudier part of the year begins around May 5 and lasts for 6.1 months, ending around November 9. On August 29, 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 Mali varies very significantly throughout the year.

The wetter season lasts 4.5 months, from May 28 to October 12, with a greater than 47% chance of a given day being a wet day. The chance of a wet day peaks at 93% on August 20.

The drier season lasts 7.5 months, from October 12 to May 28. The smallest chance of a wet day is 0% on January 3.

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 93% on August 20.

Rainfall

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 of the year. Mali experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.7 months, from April 25 to November 15, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 18, with an average total accumulation of 14.7 inches.

The rainless period of the year lasts for 5.3 months, from November 15 to April 25. The least rain falls around December 21, with an average total accumulation of 0.0 inches.

The length of the day in Mali does not vary substantially over the course of the year, staying within 50 minutes of 12 hours throughout. In 2017, the shortest day is December 21, with 11 hours, 25 minutes of daylight; the longest day is June 21, with 12 hours, 50 minutes of daylight.

The earliest sunrise is at 6:23 AM on June 1, and the latest sunrise is 51 minutes later at 7:14 AM on January 24. The earliest sunset is at 6:20 PM on November 18, and the latest sunset is 58 minutes later at 7:18 PM on July 10.

Daylight saving time (DST) is not observed in Mali during 2017.

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.

Mali experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.5 months, from April 30 to November 14, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is August 10, with muggy conditions 96% of the time.

The least muggy day of the year is January 9, when muggy conditions are essentially unheard of.

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 Mali experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from December 1 to June 18, with average wind speeds of more than 3.2 miles per hour. The windiest day of the year is January 30, with an average hourly wind speed of 4.1 miles per hour.

The calmer time of year lasts for 5.5 months, from June 18 to December 1. The calmest day of the year is October 17, with an average hourly wind speed of 2.3 miles per hour.

The predominant average hourly wind direction in Mali varies throughout the year.

The wind is most often from the north for 1.1 months, from March 5 to April 7, with a peak percentage of 43% on March 21. The wind is most often from the west for 5.6 months, from April 7 to September 26, with a peak percentage of 64% on August 5. The wind is most often from the east for 5.3 months, from September 26 to March 5, with a peak percentage of 75% on January 1.

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 2.3 months, from February 24 to May 3, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is April 3, with an average of 6.9 kWh.

The darker period of the year lasts for 4.4 months, from June 22 to November 5, with an average daily incident shortwave energy per square meter below 5.2 kWh. The darkest day of the year is August 9, with an average of 4.7 kWh.

For the purposes of this report, the geographical coordinates of Mali are 12.079 deg latitude, -12.298 deg longitude, and 4,429 ft elevation.

The topography within 2 miles of Mali contains very significant variations in elevation, with a maximum elevation change of 1,043 feet and an average elevation above sea level of 4,477 feet. Within 10 miles contains very significant variations in elevation (4,213 feet). Within 50 miles also contains extreme variations in elevation (4,875 feet).

The area within 2 miles of Mali is covered by trees (42%), cropland (20%), shrubs (16%), and artificial surfaces (13%), within 10 miles by trees (48%) and shrubs (23%), and within 50 miles by trees (47%) and shrubs (23%).

This report illustrates the typical weather in Mali, 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 is only a single weather station, Kéniéba Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Mali.

At a distance of 144 kilometers from Mali, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Mali according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

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 .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.