Average Weather in Ash Shaţrah Iraq

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3. Dhi Qar
4. Al-Shatra District
5. Ash Shaţrah

In Ash Shaţrah, the summers are long, sweltering, arid, windy, and clear and the winters are cool, dry, and mostly clear. Over the course of the year, the temperature typically varies from 43°F to 116°F and is rarely below 35°F or above 121°F.

The hot season lasts for 4.0 months, from May 23 to September 24, with an average daily high temperature above 105°F. The hottest day of the year is July 28, with an average high of 116°F and low of 87°F.

The cool season lasts for 3.3 months, from November 24 to March 3, with an average daily high temperature below 74°F. The coldest day of the year is January 14, with an average low of 43°F and high of 64°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 Ash Shaţrah, 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 Ash Shaţrah begins around May 23 and lasts for 4.7 months, ending around October 15. On September 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 99% of the time, and overcast or mostly cloudy 1% of the time.

The cloudier part of the year begins around October 15 and lasts for 7.3 months, ending around May 23. On December 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 35% of the time, and clear, mostly clear, or partly cloudy 65% 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 Ash Shaţrah varies throughout the year.

The wetter season lasts 5.4 months, from November 9 to April 20, with a greater than 6% chance of a given day being a wet day. The chance of a wet day peaks at 12% on January 17.

The drier season lasts 6.6 months, from April 20 to November 9. The smallest chance of a wet day is 0% on July 21.

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 12% on January 17.

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. Ash Shaţrah experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 3.2 months, from November 29 to March 4, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 11, with an average total accumulation of 0.7 inches.

The rainless period of the year lasts for 8.8 months, from March 4 to November 29. The least rain falls around July 31, with an average total accumulation of 0.0 inches.

The length of the day in Ash Shaţrah varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 6 minutes of daylight; the longest day is June 21, with 14 hours, 12 minutes of daylight.

The earliest sunrise is at 4:50 AM on June 12, and the latest sunrise is 2 hours, 5 minutes later at 6:55 AM on January 9. The earliest sunset is at 4:51 PM on December 3, and the latest sunset is 2 hours, 12 minutes later at 7:03 PM on June 30.

Daylight saving time (DST) is not observed in Ash Shaţrah 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.

The perceived humidity level in Ash Shaţrah, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 1% of 1% throughout.

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 Ash Shaţrah experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.3 months, from May 27 to September 6, with average wind speeds of more than 5.8 miles per hour. The windiest day of the year is June 27, with an average hourly wind speed of 7.4 miles per hour.

The calmer time of year lasts for 8.7 months, from September 6 to May 27. The calmest day of the year is November 29, with an average hourly wind speed of 4.2 miles per hour.

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

The wind is most often from the north for 3.4 months, from March 12 to June 23 and for 3.3 months, from August 3 to November 13, with a peak percentage of 60% on September 12. The wind is most often from the west for 1.4 months, from June 23 to August 3 and for 4.0 months, from November 13 to March 12, with a peak percentage of 54% on July 8.

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from May 15 to August 26, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest day of the year is June 22, with an average of 8.3 kWh.

The darker period of the year lasts for 3.2 months, from November 1 to February 8, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is December 19, with an average of 3.1 kWh.

For the purposes of this report, the geographical coordinates of Ash Shaţrah are 31.409 deg latitude, 46.173 deg longitude, and 26 ft elevation.

The topography within 2 miles of Ash Shaţrah is essentially flat, with a maximum elevation change of 62 feet and an average elevation above sea level of 29 feet. Within 10 miles is essentially flat (135 feet). Within 50 miles also contains only modest variations in elevation (266 feet).

The area within 2 miles of Ash Shaţrah is covered by cropland (45%), herbaceous vegetation (28%), and artificial surfaces (23%), within 10 miles by cropland (56%) and herbaceous vegetation (24%), and within 50 miles by herbaceous vegetation (34%) and bare soil (30%).

This report illustrates the typical weather in Ash Shaţrah, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Ash Shaţrah.

For each station, the records are corrected for the elevation difference between that station and Ash Shaţrah 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 Ash Shaţrah is computed as the weighted average of the individual contributions from each station, in addition to a contribution from the MERRA-2 reconstruction, corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Ash Shaţrah.

The station weigths are proportional to the inverse of the distance between Ash Shaţrah and a given station.

The weight assigned to the MERRA-2 value depends on the distance from Ash Shaţrah to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 30%.

The stations contributing to this reconstruction are: Basra International Airport (37%, 171 kilometers, southeast) and Al Najaf International Airport (33%, 186 kilometers, west).

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.