Average Weather at Gachsaran Airport Iran

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3. Kohgīlūyeh va Būyer Aḩmad
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At Gachsaran 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 41°F to 107°F and is rarely below 33°F or above 111°F.

The hot season lasts for 4.1 months, from May 21 to September 25, with an average daily high temperature above 97°F. The hottest day of the year is July 25, with an average high of 107°F and low of 80°F.

The cool season lasts for 3.3 months, from November 28 to March 7, with an average daily high temperature below 70°F. The coldest day of the year is January 23, with an average low of 41°F and high of 61°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 Gachsaran 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 Gachsaran Airport begins around May 20 and lasts for 5.0 months, ending around October 21. On June 19, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 98% of the time, and overcast or mostly cloudy 2% of the time.

The cloudier part of the year begins around October 21 and lasts for 7.0 months, ending around May 20. On April 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 36% of the time, and clear, mostly clear, or partly cloudy 64% 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 Gachsaran Airport varies throughout the year.

The wetter season lasts 5.2 months, from November 5 to April 12, with a greater than 8% chance of a given day being a wet day. The chance of a wet day peaks at 15% on January 21.

The drier season lasts 6.8 months, from April 12 to November 5. The smallest chance of a wet day is 0% 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 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. Gachsaran Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.7 months, from October 29 to April 20, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 16, with an average total accumulation of 1.7 inches.

The rainless period of the year lasts for 6.3 months, from April 20 to October 29. The least rain falls around September 14, with an average total accumulation of 0.0 inches.

The length of the day at Gachsaran Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 11 minutes of daylight; the longest day is June 21, with 14 hours, 6 minutes of daylight.

The earliest sunrise is at 5:54 AM on September 22, and the latest sunrise is 1 hour, 13 minutes later at 7:08 AM on March 22. The earliest sunset is at 5:05 PM on December 3, and the latest sunset is 3 hours, 7 minutes later at 8:12 PM on June 30.

Daylight saving time (DST) is observed at Gachsaran 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 Gachsaran 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, 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 at Gachsaran Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.6 months, from April 21 to October 9, with average wind speeds of more than 3.9 miles per hour. The windiest day of the year is June 5, with an average hourly wind speed of 4.8 miles per hour.

The calmer time of year lasts for 6.4 months, from October 9 to April 21. The calmest day of the year is December 30, with an average hourly wind speed of 3.1 miles per hour.

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

The wind is most often from the west for 6.5 months, from March 29 to October 12, with a peak percentage of 46% on June 24. The wind is most often from the east for 5.5 months, from October 12 to March 29, with a peak percentage of 46% on January 1.

Gachsaran Airport 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 significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 29 to October 14, with an average temperature above 85°F. The day of the year with the warmest water is August 21, with an average temperature of 91°F.

The time of year with cooler water lasts for 3.4 months, from December 24 to April 6, with an average temperature below 68°F. The day of the year with the coolest water is February 13, with an average temperature of 63°F.

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 12 to August 23, with an average daily incident shortwave energy per square meter above 7.6 kWh. The brightest day of the year is June 15, with an average of 8.6 kWh.

The darker period of the year lasts for 3.2 months, from November 5 to February 10, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is December 26, with an average of 3.4 kWh.

For the purposes of this report, the geographical coordinates of Gachsaran Airport are 30.338 deg latitude, 50.828 deg longitude, and 2,480 ft elevation.

The topography within 2 miles of Gachsaran Airport contains significant variations in elevation, with a maximum elevation change of 522 feet and an average elevation above sea level of 2,469 feet. Within 10 miles contains significant variations in elevation (7,139 feet). Within 50 miles also contains extreme variations in elevation (11,778 feet).

The area within 2 miles of Gachsaran Airport is covered by shrubs (62%), grassland (20%), and sparse vegetation (18%), within 10 miles by shrubs (64%) and sparse vegetation (15%), and within 50 miles by shrubs (57%) and trees (17%).

This report illustrates the typical weather at Gachsaran 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

Gachsaran 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.

The stations on which we may fall back are Aghajari Airport and Mahshahr 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.