Winter Weather in Heishui China

Daily high temperatures are around 51°F, rarely falling below 37°F or exceeding 68°F. The lowest daily average high temperature is 47°F on January 18.

Daily low temperatures are around 35°F, rarely falling below 25°F or exceeding 46°F. The lowest daily average low temperature is 31°F on January 19.

For reference, on July 25, the hottest day of the year, temperatures in Heishui typically range from 71°F to 86°F, while on January 19, the coldest day of the year, they range from 31°F to 47°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.

Nashville, United States (7,863 miles away) and Winston-Salem, United States (7,940 miles) are the far-away foreign places with temperatures most similar to Heishui (view comparison).

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The winter in Heishui experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 43% to 52%. The lowest chance of overcast or mostly cloudy conditions is 41% on January 20.

The clearest day of the winter is January 20, with clear, mostly clear, or partly cloudy conditions 59% of the time.

For reference, on July 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on January 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 59%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Heishui, the chance of a wet day over the course of the winter is gradually increasing, starting the season at 12% and ending it at 15%.

For reference, the year's highest daily chance of a wet day is 49% on June 13, and its lowest chance is 6% on December 28.

Over the course of the winter in Heishui, the chance of a day with only rain increases from 11% to 14%, the chance of a day with mixed snow and rain remains an essentially constant 2% 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 winter in Heishui is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.9 inches.

The lowest average 31-day accumulation is 0.3 inches on January 14.

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 Heishui is gradually increasing, starting the season at 0.1 inches, when it rarely exceeds 0.2 inches or falls below -0.0 inches, and ending the season at 0.5 inches, when it rarely exceeds 2.0 inches or falls below -0.0 inches.

The highest average 31-day accumulation is 1.2 inches on January 18.

Over the course of the winter in Heishui, 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, 6 minutes, implying an average daily increase of 44 seconds, and weekly increase of 5 minutes, 9 seconds.

The shortest day of the winter is December 21, with 10 hours, 19 minutes of daylight and the longest day is February 28, with 11 hours, 33 minutes of daylight.

The latest sunrise of the winter in Heishui is 7:40 AM on January 11 and the earliest sunrise is 28 minutes earlier at 7:12 AM on February 28.

The earliest sunset is 5:48 PM on December 1 and the latest sunset is 57 minutes later at 6:45 PM on February 28.

Daylight saving time is not observed in Heishui during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:48 AM and sets 13 hours, 58 minutes later, at 7:46 PM, while on December 21, the shortest day of the year, it rises at 7:34 AM and sets 10 hours, 19 minutes later, at 5:54 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 Heishui is essentially constant during the winter, remaining around 0% throughout.

For reference, on July 23, the muggiest day of the year, there are muggy conditions 97% 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 Heishui is increasing during the winter, increasing from 4.8 miles per hour to 6.2 miles per hour over the course of the season.

For reference, on March 9, the windiest day of the year, the daily average wind speed is 6.5 miles per hour, while on December 11, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.

The lowest daily average wind speed during the winter is 4.8 miles per hour on December 12.

The hourly average wind direction in Heishui throughout the winter is predominantly from the east, with a peak proportion of 67% on February 13.

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 Heishui typically lasts for 9.0 months (275 days), from around March 4 to around December 4, rarely starting before February 12 or after March 24, and rarely ending before November 16 or after December 22.

The smallest chance that a given day will be within the growing season in Heishui during the winter is 0% on January 14.

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 Heishui are very rapidly decreasing during the winter, decreasing by 4,553°F, from 4,601°F to 48°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 Heishui is gradually increasing during the winter, rising by 0.8 kWh, from 2.8 kWh to 3.5 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.7 kWh on December 23.

For the purposes of this report, the geographical coordinates of Heishui are 28.594 deg latitude, 108.440 deg longitude, and 2,034 ft elevation.

The topography within 2 miles of Heishui contains very significant variations in elevation, with a maximum elevation change of 1,342 feet and an average elevation above sea level of 2,193 feet. Within 10 miles contains very significant variations in elevation (3,645 feet). Within 50 miles also contains extreme variations in elevation (7,464 feet).

The area within 2 miles of Heishui is covered by trees (46%), cropland (34%), and grassland (19%), within 10 miles by trees (47%) and cropland (31%), and within 50 miles by trees (54%) and cropland (26%).