Average Weather in Miadanandriana Madagascar

In Miadanandriana, the summers are long, warm, and mostly cloudy; the winters are short, cool, and mostly clear; and it is wet year round. Over the course of the year, the temperature typically varies from 49°F to 77°F and is rarely below 44°F or above 83°F.

The warm season lasts for 5.8 months, from October 18 to April 13, with an average daily high temperature above 75°F. The hottest day of the year is December 11, with an average high of 77°F and low of 60°F.

The cool season lasts for 2.5 months, from June 9 to August 25, with an average daily high temperature below 67°F. The coldest day of the year is July 12, with an average low of 49°F and high of 65°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.

Average Hourly Temperature

The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Miadanandriana, 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 Miadanandriana begins around April 6 and lasts for 7.3 months, ending around November 15. On June 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 86% of the time, and overcast or mostly cloudy 14% of the time.

The cloudier part of the year begins around November 15 and lasts for 4.7 months, ending around April 6. On January 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 83% of the time, and clear, mostly clear, or partly cloudy 17% of the time.

Cloud Cover

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Miadanandriana varies very significantly throughout the year.

The wetter season lasts 4.8 months, from November 19 to April 13, with a greater than 54% chance of a given day being a wet day. The chance of a wet day peaks at 88% on February 14.

The drier season lasts 7.2 months, from April 13 to November 19. The smallest chance of a wet day is 19% on September 17.

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 88% on February 14.

Daily Chance of Precipitation

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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. Miadanandriana experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Miadanandriana. The most rain falls during the 31 days centered around January 23, with an average total accumulation of 17.2 inches.

The least rain falls around September 7, with an average total accumulation of 1.4 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Miadanandriana varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 59 minutes of daylight; the longest day is December 21, with 13 hours, 17 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:01 AM on November 26, and the latest sunrise is 1 hour, 21 minutes later at 6:22 AM on July 6. The earliest sunset is at 5:18 PM on June 5, and the latest sunset is 1 hour, 14 minutes later at 6:32 PM on January 17.

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

Sunrise & Sunset with Twilight

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

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.

Miadanandriana experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.1 months, from November 16 to April 20, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is February 6, with muggy conditions 40% of the time.

The least muggy day of the year is July 10, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Miadanandriana does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 3.0 miles per hour throughout.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Miadanandriana is from the east throughout the year.

Wind Direction

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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 2.9 months, from September 18 to December 15, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is November 8, with an average of 7.0 kWh.

The darker period of the year lasts for 2.5 months, from May 19 to August 4, with an average daily incident shortwave energy per square meter below 4.9 kWh. The darkest day of the year is June 27, with an average of 4.3 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Miadanandriana are -19.033 deg latitude, 47.783 deg longitude, and 4,573 ft elevation.

The topography within 2 miles of Miadanandriana contains significant variations in elevation, with a maximum elevation change of 689 feet and an average elevation above sea level of 4,579 feet. Within 10 miles contains significant variations in elevation (1,804 feet). Within 50 miles contains very significant variations in elevation (7,300 feet).

The area within 2 miles of Miadanandriana is covered by trees (35%), grassland (33%), and cropland (27%), within 10 miles by trees (47%) and grassland (26%), and within 50 miles by trees (41%) and grassland (38%).

Data Sources

This report illustrates the typical weather in Miadanandriana, 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, Ivato International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Miadanandriana.

At a distance of 41 kilometers from Miadanandriana, 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 Miadanandriana 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.