Winter Weather in Xianyang China

Daily high temperatures are around 58°F, rarely falling below 44°F or exceeding 73°F. The lowest daily average high temperature is 55°F on January 20.

Daily low temperatures are around 39°F, rarely falling below 26°F or exceeding 53°F. The lowest daily average low temperature is 35°F on January 19.

For reference, on July 22, the hottest day of the year, temperatures in Xianyang typically range from 74°F to 90°F, while on January 19, the coldest day of the year, they range from 35°F to 55°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.

Moorhead, United States (7,790 miles away) and Navassa, United States (8,007 miles) are the far-away foreign places with temperatures most similar to Xianyang (view comparison).

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The winter in Xianyang experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 30% to 46%. The lowest chance of overcast or mostly cloudy conditions is 29% on December 17.

The clearest day of the winter is December 17, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on July 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on October 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Xianyang, the chance of a wet day over the course of the winter is very rapidly increasing, starting the season at 16% and ending it at 41%.

For reference, the year's highest daily chance of a wet day is 53% on June 12, and its lowest chance is 13% on December 18.

Over the course of the winter in Xianyang, the chance of a day with only rain increases from 16% to 40%, 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 Xianyang is very rapidly increasing, starting the season at 1.9 inches, when it rarely exceeds 4.6 inches or falls below 0.2 inches, and ending the season at 4.8 inches, when it rarely exceeds 8.4 inches or falls below 1.8 inches.

The lowest average 31-day accumulation is 1.5 inches on December 21.

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 Xianyang is essentially constant, remaining about 0.7 inches throughout, and rarely exceeding 3.9 inches or falling to 0.0 inches.

The highest average 31-day accumulation is 1.2 inches on January 20.

Over the course of the winter in Xianyang, 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, 4 minutes, implying an average daily increase of 43 seconds, and weekly increase of 5 minutes, 2 seconds.

The shortest day of the winter is December 22, with 10 hours, 22 minutes of daylight and the longest day is February 28, with 11 hours, 34 minutes of daylight.

The latest sunrise of the winter in Xianyang is 6:58 AM on January 11 and the earliest sunrise is 27 minutes earlier at 6:31 AM on February 28.

The earliest sunset is 5:09 PM on December 1 and the latest sunset is 56 minutes later at 6:05 PM on February 28.

Daylight saving time is not observed in Xianyang during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:09 AM and sets 13 hours, 55 minutes later, at 7:05 PM, while on December 21, the shortest day of the year, it rises at 6:53 AM and sets 10 hours, 22 minutes later, at 5:14 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 Xianyang 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 100% 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 Xianyang is essentially constant during the winter, remaining within 0.2 miles per hour of 4.7 miles per hour throughout.

For reference, on March 27, the windiest day of the year, the daily average wind speed is 5.0 miles per hour, while on August 24, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.

The wind direction in Xianyang during the winter is predominantly out of the east from December 1 to January 1 and from January 16 to February 28 and the north from January 1 to January 16.

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 Xianyang typically lasts for 8.8 months (269 days), from around March 5 to around November 29, rarely starting before February 14 or after March 24, and rarely ending before November 10 or after December 19.

The winter in Xianyang 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 17.

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 Xianyang are very rapidly decreasing during the winter, decreasing by 5,436°F, from 5,580°F to 144°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 Xianyang is essentially constant during the winter, remaining within 0.3 kWh of 3.6 kWh throughout.

The lowest average daily incident shortwave solar energy during the winter is 3.2 kWh on January 7.

For the purposes of this report, the geographical coordinates of Xianyang are 28.046 deg latitude, 118.518 deg longitude, and 906 ft elevation.

The topography within 2 miles of Xianyang contains very significant variations in elevation, with a maximum elevation change of 1,171 feet and an average elevation above sea level of 1,047 feet. Within 10 miles contains very significant variations in elevation (3,953 feet). Within 50 miles also contains extreme variations in elevation (6,900 feet).

The area within 2 miles of Xianyang is covered by cropland (49%) and trees (32%), within 10 miles by trees (58%) and cropland (21%), and within 50 miles by trees (75%) and cropland (12%).