Average Weather in Mahajanga Madagascar
In Mahajanga, the wet season is oppressive and overcast; the dry season is muggy, windy, and mostly clear; and it is hot year round. Over the course of the year, the temperature typically varies from 66°F to 91°F and is rarely below 63°F or above 94°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
In Mahajanga, 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 Mahajanga begins around April 7 and lasts for 7.5 months, ending around November 22. On August 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 91% of the time, and overcast or mostly cloudy 9% of the time.
The cloudier part of the year begins around November 22 and lasts for 4.5 months, ending around April 7. On January 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 85% of the time, and clear, mostly clear, or partly cloudy 15% 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 Mahajanga varies very significantly throughout the year.
The wetter season lasts 4.1 months, from November 27 to March 29, with a greater than 45% chance of a given day being a wet day. The chance of a wet day peaks at 85% on January 23.
The drier season lasts 7.9 months, from March 29 to November 27. The smallest chance of a wet day is 4% on September 15.
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 85% on January 23.
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 of the year. Mahajanga experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 7.2 months, from October 6 to May 13, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 28, with an average total accumulation of 15.6 inches.
The rainless period of the year lasts for 4.8 months, from May 13 to October 6. The least rain falls around August 31, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in Mahajanga varies over the course of the year. In 2017, the shortest day is June 21, with 11 hours, 12 minutes of daylight; the longest day is December 21, with 13 hours, 4 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:13 AM on November 23, and the latest sunrise is 1 hour, 9 minutes later at 6:22 AM on July 9. The earliest sunset is at 5:30 PM on June 2, and the latest sunset is 1 hour, 3 minutes later at 6:33 PM on January 20.
Daylight saving time (DST) is not observed in Mahajanga during 2017.
Sunrise & Sunset with Twilight
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.
Mahajanga experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 9.0 months, from September 10 to June 11, during which time the comfort level is muggy, oppressive, or miserable at least 43% of the time. The muggiest day of the year is February 20, with muggy conditions 100% of the time.
The least muggy day of the year is July 19, with muggy conditions 23% 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 Mahajanga experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from May 23 to October 30, with average wind speeds of more than 4.9 miles per hour. The windiest day of the year is August 4, with an average hourly wind speed of 6.1 miles per hour.
The calmer time of year lasts for 6.8 months, from October 30 to May 23. The calmest day of the year is March 25, with an average hourly wind speed of 3.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Mahajanga varies throughout the year.
The wind is most often from the east for 8.4 months, from March 8 to November 21, with a peak percentage of 79% on August 15. The wind is most often from the west for 3.6 months, from November 21 to March 8, with a peak percentage of 41% on January 1.
Mahajanga 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 5.2 months, from December 1 to May 8, with an average temperature above 84°F. The day of the year with the warmest water is March 24, with an average temperature of 85°F.
The time of year with cooler water lasts for 3.0 months, from June 27 to September 28, with an average temperature below 79°F. The day of the year with the coolest water is August 5, with an average temperature of 78°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 2.1 months, from September 13 to November 17, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is October 23, with an average of 7.4 kWh.
The darker period of the year lasts for 2.8 months, from December 25 to March 20, with an average daily incident shortwave energy per square meter below 5.6 kWh. The darkest day of the year is January 19, with an average of 5.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Mahajanga are -15.717 deg latitude, 46.317 deg longitude, and 0 ft elevation.
The topography within 2 miles of Mahajanga contains only modest variations in elevation, with a maximum elevation change of 167 feet and an average elevation above sea level of 24 feet. Within 10 miles also contains only modest variations in elevation (351 feet). Within 50 miles contains only modest variations in elevation (1,070 feet).
The area within 2 miles of Mahajanga is covered by water (52%) and grassland (44%), within 10 miles by water (51%) and grassland (42%), and within 50 miles by water (46%) and grassland (37%).
This report illustrates the typical weather in Mahajanga, 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, Majunga, in our network suitable to be used as a proxy for the historical temperature and dew point records of Mahajanga.
At a distance of 7 kilometers from Mahajanga, 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 Mahajanga 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.
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.