Average Weather at Shiraz International Airport Iran

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4. Shahrestān-e Shīrāz
5. Shiraz International Airport

At Shiraz International Airport, the summers are long, sweltering, arid, and clear and the winters are cold and mostly clear. Over the course of the year, the temperature typically varies from 33°F to 100°F and is rarely below 26°F or above 104°F.

The hot season lasts for 3.9 months, from May 24 to September 21, with an average daily high temperature above 90°F. The hottest day of the year is July 12, with an average high of 100°F and low of 72°F.

The cool season lasts for 3.3 months, from November 27 to March 5, with an average daily high temperature below 63°F. The coldest day of the year is January 15, with an average low of 33°F and high of 54°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.

At Shiraz International Airport, 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 at Shiraz International Airport begins around May 18 and lasts for 5.2 months, ending around October 24. On June 16, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 97% of the time, and overcast or mostly cloudy 3% of the time.

The cloudier part of the year begins around October 24 and lasts for 6.8 months, ending around May 18. On April 16, 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 at Shiraz International Airport varies throughout the year.

The wetter season lasts 5.0 months, from November 12 to April 11, with a greater than 8% chance of a given day being a wet day. The chance of a wet day peaks at 16% on January 21.

The drier season lasts 7.0 months, from April 11 to November 12. The smallest chance of a wet day is 0% on September 9.

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 15% on January 21.

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. Shiraz International Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.4 months, from November 3 to April 16, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 17, with an average total accumulation of 1.6 inches.

The rainless period of the year lasts for 6.6 months, from April 16 to November 3. The least rain falls around September 19, with an average total accumulation of 0.0 inches.

The length of the day at Shiraz International Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 15 minutes of daylight; the longest day is June 21, with 14 hours, 3 minutes of daylight.

The earliest sunrise is at 5:47 AM on September 22, and the latest sunrise is 1 hour, 13 minutes later at 7:01 AM on March 22. The earliest sunset is at 5:00 PM on December 1, and the latest sunset is 3 hours, 3 minutes later at 8:03 PM on June 30.

Daylight saving time (DST) is observed at Shiraz International Airport during 2017, starting in the spring on March 22, lasting 6.0 months, and ending in the fall on September 21.

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 at Shiraz International Airport, 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, remaining a virtually constant 0% 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 at Shiraz International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.5 months, from January 26 to September 11, with average wind speeds of more than 3.6 miles per hour. The windiest day of the year is July 17, with an average hourly wind speed of 4.1 miles per hour.

The calmer time of year lasts for 4.5 months, from September 11 to January 26. The calmest day of the year is November 8, with an average hourly wind speed of 3.1 miles per hour.

The predominant average hourly wind direction at Shiraz International Airport varies throughout the year.

The wind is most often from the east for 2.6 weeks, from July 14 to August 1, with a peak percentage of 35% on July 31. The wind is most often from the north for 1.3 months, from August 1 to September 11, with a peak percentage of 36% on August 20. The wind is most often from the west for 10 months, from September 11 to July 14, with a peak percentage of 46% 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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from May 7 to August 25, with an average daily incident shortwave energy per square meter above 7.8 kWh. The brightest day of the year is June 14, with an average of 8.8 kWh.

The darker period of the year lasts for 3.1 months, from November 6 to February 8, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest day of the year is December 26, with an average of 3.7 kWh.

For the purposes of this report, the geographical coordinates of Shiraz International Airport are 29.539 deg latitude, 52.590 deg longitude, and 4,888 ft elevation.

The topography within 2 miles of Shiraz International Airport contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 4,893 feet. Within 10 miles contains only modest variations in elevation (4,052 feet). Within 50 miles also contains extreme variations in elevation (8,465 feet).

The area within 2 miles of Shiraz International Airport is covered by shrubs (33%), sparse vegetation (24%), artificial surfaces (15%), and cropland (14%), within 10 miles by shrubs (42%) and sparse vegetation (22%), and within 50 miles by shrubs (45%) and sparse vegetation (25%).

This report illustrates the typical weather at Shiraz International Airport, 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

Shiraz International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

In this case, the only station close and reliable enough to use as a fallback is Fasa Airport.

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.