Fall Weather in Mashhad Iran

Daily high temperatures decrease by 36°F, from 89°F to 53°F, rarely falling below 41°F or exceeding 96°F.

Daily low temperatures decrease by 28°F, from 62°F to 34°F, rarely falling below 26°F or exceeding 67°F.

For reference, on July 17, the hottest day of the year, temperatures in Mashhad typically range from 70°F to 94°F, while on January 22, the coldest day of the year, they range from 28°F to 45°F.

The figure below shows you a compact characterization of the hourly average fall temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Blackwell, United States (7,179 miles away) and Cairo, United States (6,997 miles) are the far-away foreign places with temperatures most similar to Mashhad (view comparison).

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The fall in Mashhad experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 0% to 34%.

The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 100% of the time.

For reference, on March 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 41%, while on August 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 100%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mashhad, the chance of a wet day over the course of the fall is rapidly increasing, starting the season at 0% and ending it at 8%.

For reference, the year's highest daily chance of a wet day is 16% on March 16, and its lowest chance is 0% on August 17.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Mashhad is gradually increasing, starting the season at 0.0 inches, when it rarely exceeds 0.1 inches or falls below -0.0 inches, and ending the season at 0.4 inches, when it rarely exceeds 0.8 inches.

Over the course of the fall in Mashhad, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 3 minutes, implying an average daily decrease of 2 minutes, 2 seconds, and weekly decrease of 14 minutes, 13 seconds.

The shortest day of the fall is November 30, with 9 hours, 53 minutes of daylight and the longest day is September 1, with 12 hours, 56 minutes of daylight.

The earliest sunrise of the fall in Mashhad is 5:03 AM on September 1 and the latest sunrise is 1 hour, 20 minutes later at 6:23 AM on November 30.

The latest sunset is 5:59 PM on September 1 and the earliest sunset is 1 hour, 42 minutes earlier at 4:16 PM on November 30.

Daylight saving time is not observed in Mashhad during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:14 AM and sets 14 hours, 38 minutes later, at 6:52 PM, while on December 21, the shortest day of the year, it rises at 6:39 AM and sets 9 hours, 41 minutes later, at 4:20 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the fall of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy in Mashhad is essentially constant during the fall, remaining around 0% throughout.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Mashhad is decreasing during the fall, decreasing from 8.8 miles per hour to 7.1 miles per hour over the course of the season.

For reference, on July 18, the windiest day of the year, the daily average wind speed is 11.4 miles per hour, while on October 18, the calmest day of the year, the daily average wind speed is 6.1 miles per hour.

The lowest daily average wind speed during the fall is 6.1 miles per hour on October 18.

The wind direction in Mashhad during the fall is predominantly out of the east from September 1 to October 27 and the west from October 27 to November 30.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Mashhad typically lasts for 7.9 months (241 days), from around March 18 to around November 14, rarely starting before February 27 or after April 7, and rarely ending before October 16 or after December 4.

During the fall in Mashhad, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 16% over the course of the season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Mashhad are very rapidly increasing during the fall, increasing by 1,048°F, from 3,751°F to 4,799°F, over the course of the season.

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 in Mashhad is very rapidly decreasing during the fall, falling by 4.2 kWh, from 7.2 kWh to 3.0 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Mashhad are 36.316 deg latitude, 59.568 deg longitude, and 3,291 ft elevation.

The topography within 2 miles of Mashhad contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 3,302 feet. Within 10 miles contains only modest variations in elevation (2,152 feet). Within 50 miles contains large variations in elevation (9,413 feet).

The area within 2 miles of Mashhad is covered by artificial surfaces (98%), within 10 miles by artificial surfaces (53%) and shrubs (23%), and within 50 miles by shrubs (71%) and cropland (11%).