Fall Weather in Qitai China

Daily high temperatures decrease by 46°F, from 74°F to 27°F, rarely falling below 14°F or exceeding 82°F.

Daily low temperatures decrease by 41°F, from 49°F to 8°F, rarely falling below -2°F or exceeding 56°F.

For reference, on July 19, the hottest day of the year, temperatures in Qitai typically range from 58°F to 82°F, while on January 13, the coldest day of the year, they range from -1°F to 19°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, Canada (5,796 miles away) is the far-away foreign place with temperatures most similar to Qitai (view comparison).

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The fall in Qitai experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 33% to 26%. The lowest chance of overcast or mostly cloudy conditions is 25% on November 16.

The clearest day of the fall is November 16, with clear, mostly clear, or partly cloudy conditions 75% of the time.

For reference, on June 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 43%, while on November 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Qitai, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 22% and ending it at 1%.

For reference, the year's highest daily chance of a wet day is 34% on July 28, and its lowest chance is 0% on December 26.

Over the course of the fall in Qitai, the chance of a day with only rain decreases from 22% to 0%, the chance of a day with mixed snow and rain remains an essentially constant 0% throughout, and the chance of a day with only snow remains an essentially constant 1% 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 fall in Qitai is rapidly decreasing, starting the season at 1.6 inches, when it rarely exceeds 2.7 inches or falls below 0.6 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 Qitai, 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, 42 minutes, implying an average daily decrease of 2 minutes, 28 seconds, and weekly decrease of 17 minutes, 16 seconds.

The shortest day of the fall is November 30, with 9 hours, 25 minutes of daylight and the longest day is September 1, with 13 hours, 7 minutes of daylight.

The earliest sunrise of the fall in Qitai is 5:52 AM on September 1 and the latest sunrise is 1 hour, 40 minutes later at 7:31 AM on November 30.

The latest sunset is 6:58 PM on September 1 and the earliest sunset is 2 hours, 2 minutes earlier at 4:56 PM on November 30.

Daylight saving time is not observed in Qitai during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:51 AM and sets 15 hours, 11 minutes later, at 8:03 PM, while on December 21, the shortest day of the year, it rises at 7:49 AM and sets 9 hours, 10 minutes later, at 4:58 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 Qitai is essentially constant during the fall, remaining around 0% throughout.

For reference, on July 30, the muggiest day of the year, there are muggy conditions 1% 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 Qitai is very rapidly increasing during the fall, increasing from 9.0 miles per hour to 13.1 miles per hour over the course of the season.

For reference, on April 19, the windiest day of the year, the daily average wind speed is 14.2 miles per hour, while on August 16, the calmest day of the year, the daily average wind speed is 8.7 miles per hour.

The hourly average wind direction in Qitai throughout the fall is predominantly from the west, with a peak proportion of 66% on November 29.

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 Qitai typically lasts for 4.4 months (135 days), from around May 12 to around September 24, rarely starting before April 26 or after May 28, and rarely ending before September 8 or after October 9.

During the fall in Qitai, the chance that a given day is within the growing season is very rapidly decreasing falling from 98% 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 Qitai are increasing during the fall, increasing by 281°F, from 1,881°F to 2,162°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 Qitai is very rapidly decreasing during the fall, falling by 3.1 kWh, from 5.6 kWh to 2.5 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Qitai are 41.549 deg latitude, 113.534 deg longitude, and 4,498 ft elevation.

The topography within 2 miles of Qitai contains only modest variations in elevation, with a maximum elevation change of 328 feet and an average elevation above sea level of 4,531 feet. Within 10 miles contains only modest variations in elevation (1,512 feet). Within 50 miles contains very significant variations in elevation (2,828 feet).

The area within 2 miles of Qitai is covered by artificial surfaces (46%), trees (31%), and grassland (16%), within 10 miles by grassland (58%) and cropland (21%), and within 50 miles by grassland (60%) and cropland (21%).