Fall Weather in Bayanhoshuu Mongolia

Daily high temperatures decrease by 47°F, from 72°F to 25°F, rarely falling below 14°F or exceeding 82°F.

Daily low temperatures decrease by 41°F, from 50°F to 9°F, rarely falling below -1°F or exceeding 57°F.

For reference, on July 23, the hottest day of the year, temperatures in Bayanhoshuu typically range from 60°F to 81°F, while on January 18, the coldest day of the year, they range from 0°F to 16°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.

Estevan, Saskatchewan, Canada (5,657 miles away) and Fosston, Minnesota, United States (5,807 miles) are the far-away foreign places with temperatures most similar to Bayanhoshuu (view comparison).

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The fall in Bayanhoshuu experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 44%.

The clearest day of the fall is September 2, with clear, mostly clear, or partly cloudy conditions 69% of the time.

For reference, on April 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 45%, while on August 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Bayanhoshuu, the chance of a wet day over the course of the fall is rapidly decreasing, starting the season at 7% and ending it at 1%.

For reference, the year's highest daily chance of a wet day is 19% on July 4, and its lowest chance is 0% on January 15.

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 Bayanhoshuu is gradually decreasing, starting the season at 0.4 inches, when it rarely exceeds 0.9 inches or falls below 0.1 inches, and ending the season at 0.0 inches, when it rarely exceeds 0.0 inches or falls below -0.0 inches.

Over the course of the fall in Bayanhoshuu, 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 4 hours, 43 minutes, implying an average daily decrease of 3 minutes, 9 seconds, and weekly decrease of 22 minutes, 1 second.

The shortest day of the fall is November 30, with 8 hours, 40 minutes of daylight and the longest day is September 1, with 13 hours, 23 minutes of daylight.

The earliest sunrise of the fall in Bayanhoshuu is 6:10 AM on September 1 and the latest sunrise is 2 hours, 11 minutes later at 8:20 AM on November 30.

The latest sunset is 7:33 PM on September 1 and the earliest sunset is 2 hours, 32 minutes earlier at 5:00 PM on November 30.

Daylight saving time is not observed in Bayanhoshuu during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:51 AM and sets 16 hours, 5 minutes later, at 8:56 PM, while on December 21, the shortest day of the year, it rises at 8:40 AM and sets 8 hours, 20 minutes later, at 5:00 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 Bayanhoshuu is essentially constant during the fall, remaining around 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 in Bayanhoshuu is decreasing during the fall, decreasing from 6.7 miles per hour to 5.0 miles per hour over the course of the season.

For reference, on May 7, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on January 22, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.

The highest daily average wind speed during the fall is 6.9 miles per hour on September 13.

The hourly average wind direction in Bayanhoshuu throughout the fall is predominantly from the west, with a peak proportion of 50% on November 27.

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 Bayanhoshuu typically lasts for 5.0 months (153 days), from around May 1 to around October 1, rarely starting before April 15 or after May 18, and rarely ending before September 14 or after October 18.

During the fall in Bayanhoshuu, the chance that a given day is within the growing season is very rapidly decreasing falling from 99% to 0% 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 Bayanhoshuu are increasing during the fall, increasing by 261°F, from 2,014°F to 2,275°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 Bayanhoshuu is very rapidly decreasing during the fall, falling by 3.9 kWh, from 5.6 kWh to 1.6 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Bayanhoshuu are 48.233 deg latitude, 91.917 deg longitude, and 3,858 ft elevation.

The topography within 2 miles of Bayanhoshuu contains only modest variations in elevation, with a maximum elevation change of 164 feet and an average elevation above sea level of 3,874 feet. Within 10 miles contains only modest variations in elevation (1,939 feet). Within 50 miles contains very significant variations in elevation (9,285 feet).

The area within 2 miles of Bayanhoshuu is covered by bare soil (96%), within 10 miles by bare soil (92%), and within 50 miles by bare soil (88%).