Winter Weather in Pāsārgād Iran

Daily high temperatures are around 54°F, rarely falling below 42°F or exceeding 66°F. The lowest daily average high temperature is 50°F on January 17.

Daily low temperatures are around 32°F, rarely falling below 23°F or exceeding 42°F. The lowest daily average low temperature is 29°F on January 12.

For reference, on July 10, the hottest day of the year, temperatures in Pāsārgād typically range from 67°F to 94°F, while on January 12, the coldest day of the year, they range from 29°F to 50°F.

The figure below shows you a compact characterization of the hourly average winter 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.

Toquerville, United States (7,703 miles away); Belen, United States (7,777 miles); and Clarendon, United States (7,638 miles) are the far-away foreign places with temperatures most similar to Pāsārgād (view comparison).

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The winter in Pāsārgād experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 30% throughout the season.

The clearest day of the winter is January 31, with clear, mostly clear, or partly cloudy conditions 74% of the time.

For reference, on April 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 35%, while on September 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 98%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Pāsārgād, the chance of a wet day over the course of the winter is essentially constant, remaining around 13% throughout.

For reference, the year's highest daily chance of a wet day is 15% on January 21, and its lowest chance is 0% on September 9.

Over the course of the winter in Pāsārgād, the chance of a day with only rain remains an essentially constant 10% throughout, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.

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 winter in Pāsārgād is essentially constant, remaining about 0.9 inches throughout, and rarely exceeding 2.9 inches.

The highest average 31-day accumulation is 1.1 inches on January 18.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the winter in Pāsārgād is essentially constant, remaining about 0.7 inches throughout, and rarely exceeding 3.1 inches or falling below -0.0 inches.

The highest average 31-day accumulation is 1.2 inches on January 17.

Over the course of the winter in Pāsārgād, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 11 minutes, implying an average daily increase of 48 seconds, and weekly increase of 5 minutes, 33 seconds.

The shortest day of the winter is December 21, with 10 hours, 12 minutes of daylight and the longest day is February 28, with 11 hours, 31 minutes of daylight.

The latest sunrise of the winter in Pāsārgād is 6:54 AM on January 10 and the earliest sunrise is 30 minutes earlier at 6:24 AM on February 28.

The earliest sunset is 4:56 PM on December 3 and the latest sunset is 59 minutes later at 5:55 PM on February 28.

Daylight saving time is not observed in Pāsārgād during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:56 AM and sets 14 hours, 6 minutes later, at 7:01 PM, while on December 21, the shortest day of the year, it rises at 6:49 AM and sets 10 hours, 12 minutes later, at 5:01 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 winter 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 Pāsārgād is essentially constant during the winter, remaining around 0% throughout.

For reference, on June 12, 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 Pāsārgād is increasing during the winter, increasing from 6.7 miles per hour to 8.6 miles per hour over the course of the season.

For reference, on March 4, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on October 18, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.

The hourly average wind direction in Pāsārgād throughout the winter is predominantly from the west, with a peak proportion of 56% on February 28.

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 Pāsārgād typically lasts for 8.1 months (249 days), from around March 16 to around November 20, rarely starting before February 25 or after April 4, and rarely ending before November 2 or after December 8.

The winter in Pāsārgād is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 0% on January 15.

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 Pāsārgād are very rapidly decreasing during the winter, decreasing by 4,939°F, from 4,990°F to 51°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 Pāsārgād is rapidly increasing during the winter, rising by 1.6 kWh, from 3.9 kWh to 5.5 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 3.7 kWh on December 25.

For the purposes of this report, the geographical coordinates of Pāsārgād are 30.202 deg latitude, 53.180 deg longitude, and 6,073 ft elevation.

The topography within 2 miles of Pāsārgād contains only modest variations in elevation, with a maximum elevation change of 387 feet and an average elevation above sea level of 6,082 feet. Within 10 miles contains only modest variations in elevation (2,477 feet). Within 50 miles contains large variations in elevation (8,071 feet).

The area within 2 miles of Pāsārgād is covered by shrubs (41%) and cropland (39%), within 10 miles by shrubs (50%) and sparse vegetation (32%), and within 50 miles by shrubs (52%) and sparse vegetation (21%).