Winter Weather in Huiyuan China

Daily high temperatures are around 35°F, rarely falling below 20°F or exceeding 51°F. The lowest daily average high temperature is 30°F on January 14.

Daily low temperatures are around 18°F, rarely falling below 0°F or exceeding 33°F. The lowest daily average low temperature is 12°F on January 16.

For reference, on July 22, the hottest day of the year, temperatures in Huiyuan typically range from 64°F to 87°F, while on January 16, the coldest day of the year, they range from 12°F to 30°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.

Tekamah, Nebraska, United States (6,517 miles away) is the far-away foreign place with temperatures most similar to Huiyuan (view comparison).

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The winter in Huiyuan experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the season. The highest chance of overcast or mostly cloudy conditions is 51% on February 9.

The clearest day of the winter is December 6, with clear, mostly clear, or partly cloudy conditions 55% of the time.

For reference, on February 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on August 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Huiyuan, the chance of a wet day over the course of the winter is gradually decreasing, starting the season at 9% and ending it at 5%.

For reference, the year's highest daily chance of a wet day is 16% on May 11, and its lowest chance is 5% on January 19.

Over the course of the winter in Huiyuan, the chance of a day with only rain remains an essentially constant 2% 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 3% 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 Huiyuan is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.7 inches or falling below -0.0 inches.

The lowest average 31-day accumulation is 0.1 inches on January 16.

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 Huiyuan is gradually decreasing, starting the season at 1.2 inches, when it rarely exceeds 2.7 inches, and ending the season at 0.8 inches, when it rarely exceeds 2.4 inches.

The highest average 31-day accumulation is 1.5 inches on December 23.

Over the course of the winter in Huiyuan, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 2 hours, 0 minutes, implying an average daily increase of 1 minute, 21 seconds, and weekly increase of 9 minutes, 24 seconds.

The shortest day of the winter is December 21, with 8 hours, 54 minutes of daylight and the longest day is February 28, with 11 hours, 8 minutes of daylight.

The latest sunrise of the winter in Huiyuan is 10:11 AM on January 2 and the earliest sunrise is 56 minutes earlier at 9:15 AM on February 28.

The earliest sunset is 6:58 PM on December 9 and the latest sunset is 1 hour, 25 minutes later at 8:23 PM on February 28.

Daylight saving time is not observed in Huiyuan during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 6:53 AM and sets 15 hours, 29 minutes later, at 10:22 PM, while on December 21, the shortest day of the year, it rises at 10:08 AM and sets 8 hours, 54 minutes later, at 7:01 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 Huiyuan is essentially constant during the winter, remaining around 0% throughout.

For reference, on July 26, the muggiest day of the year, there are muggy conditions 2% 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 Huiyuan is essentially constant during the winter, remaining within 0.2 miles per hour of 8.1 miles per hour throughout.

For reference, on March 2, the windiest day of the year, the daily average wind speed is 8.4 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 6.1 miles per hour.

The hourly average wind direction in Huiyuan throughout the winter is predominantly from the east, with a peak proportion of 77% on January 17.

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 Huiyuan typically lasts for 6.6 months (203 days), from around April 1 to around October 21, rarely starting before March 11 or after April 26, and rarely ending before October 5 or after November 7.

The winter in Huiyuan is reliably fully outside of the growing 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 Huiyuan are very rapidly decreasing during the winter, decreasing by 3,595°F, from 3,596°F to 1°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 Huiyuan is rapidly increasing during the winter, rising by 1.8 kWh, from 2.0 kWh to 3.7 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 1.8 kWh on December 18.

For the purposes of this report, the geographical coordinates of Huiyuan are 43.957 deg latitude, 80.850 deg longitude, and 1,890 ft elevation.

The topography within 2 miles of Huiyuan contains only modest variations in elevation, with a maximum elevation change of 154 feet and an average elevation above sea level of 1,869 feet. Within 10 miles contains only modest variations in elevation (1,168 feet). Within 50 miles contains very significant variations in elevation (12,283 feet).

The area within 2 miles of Huiyuan is covered by grassland (30%), bare soil (15%), sparse vegetation (15%), and trees (14%), within 10 miles by cropland (41%) and grassland (32%), and within 50 miles by grassland (47%) and bare soil (20%).