Average Weather in Beteza Madagascar

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In Beteza, the wet season is hot, muggy, and partly cloudy and the dry season is warm, windy, and clear. Over the course of the year, the temperature typically varies from 54°F to 93°F and is rarely below 49°F or above 101°F.

The hot season lasts for 4.0 months, from September 27 to January 27, with an average daily high temperature above 90°F. The hottest day of the year is November 12, with an average high of 93°F and low of 66°F.

The cool season lasts for 2.4 months, from May 25 to August 6, with an average daily high temperature below 81°F. The coldest day of the year is July 7, with an average low of 54°F and high of 78°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 Beteza, 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 Beteza begins around April 6 and lasts for 7.1 months, ending around November 8. On July 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 95% of the time, and overcast or mostly cloudy 5% of the time.

The cloudier part of the year begins around November 8 and lasts for 4.9 months, ending around April 6. On January 14, the cloudiest day of the year, the sky is overcast or mostly cloudy 57% of the time, and clear, mostly clear, or partly cloudy 43% 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 Beteza varies very significantly throughout the year.

The wetter season lasts 4.5 months, from November 16 to March 31, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 64% on January 27.

The drier season lasts 7.5 months, from March 31 to November 16. The smallest chance of a wet day is 6% on August 11.

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 64% on January 27.

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. Beteza experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from August 24 to July 26, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 25, with an average total accumulation of 6.7 inches.

The rainless period of the year lasts for 4.1 weeks, from July 26 to August 24. The least rain falls around August 9, with an average total accumulation of 0.4 inches.

The length of the day in Beteza varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 37 minutes of daylight; the longest day is December 21, with 13 hours, 39 minutes of daylight.

The earliest sunrise is at 5:02 AM on November 30, and the latest sunrise is 1 hour, 42 minutes later at 6:44 AM on July 3. The earliest sunset is at 5:18 PM on June 8, and the latest sunset is 1 hour, 35 minutes later at 6:53 PM on January 12.

Daylight saving time (DST) is not observed in Beteza 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.

Beteza experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.8 months, from November 9 to May 2, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The muggiest day of the year is February 8, with muggy conditions 89% of the time.

The least muggy day of the year is July 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 Beteza experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.7 months, from August 10 to November 30, with average wind speeds of more than 5.3 miles per hour. The windiest day of the year is October 2, with an average hourly wind speed of 5.9 miles per hour.

The calmer time of year lasts for 8.4 months, from November 30 to August 10. The calmest day of the year is June 4, with an average hourly wind speed of 4.7 miles per hour.

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

The wind is most often from the south for 2.0 days, from November 20 to November 22 and for 1.7 weeks, from November 27 to December 9, with a peak percentage of 35% on December 8. The wind is most often from the east for 5.0 days, from November 22 to November 27 and for 11 months, from December 9 to November 20, with a peak percentage of 35% on November 23.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.0 months, from September 28 to January 27, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is November 15, with an average of 7.4 kWh.

The darker period of the year lasts for 2.9 months, from May 5 to August 3, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest day of the year is June 24, with an average of 4.1 kWh.

For the purposes of this report, the geographical coordinates of Beteza are -24.450 deg latitude, 45.117 deg longitude, and 1,030 ft elevation.

The topography within 2 miles of Beteza contains only modest variations in elevation, with a maximum elevation change of 184 feet and an average elevation above sea level of 1,021 feet. Within 10 miles contains only modest variations in elevation (604 feet). Within 50 miles contains significant variations in elevation (4,475 feet).

The area within 2 miles of Beteza is covered by grassland (99%), within 10 miles by grassland (98%), and within 50 miles by grassland (88%).

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

At a distance of 197 kilometers from Beteza, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .

The weight assigned to the MERRA-2 value depends on the distance from Beteza to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 49%, making the weight assigned to the weather station 51%.

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.