Winter Weather in Shanwei China

Daily high temperatures decrease by 4°F, from 72°F to 68°F, rarely falling below 56°F or exceeding 78°F. The lowest daily average high temperature is 65°F on January 27.

Daily low temperatures are around 56°F, rarely falling below 45°F or exceeding 66°F. The lowest daily average low temperature is 53°F on January 13.

For reference, on July 23, the hottest day of the year, temperatures in Shanwei typically range from 80°F to 89°F, while on January 13, the coldest day of the year, they range from 53°F to 65°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.

Port Aransas, United States (8,335 miles away) is the far-away foreign place with temperatures most similar to Shanwei (view comparison).

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The winter in Shanwei experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 27% to 31%. The lowest chance of overcast or mostly cloudy conditions is 24% on January 4.

The clearest day of the winter is January 4, with clear, mostly clear, or partly cloudy conditions 76% of the time.

For reference, on June 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 84%, while on January 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Shanwei, the chance of a wet day over the course of the winter is very rapidly increasing, starting the season at 8% and ending it at 17%.

For reference, the year's highest daily chance of a wet day is 50% on June 15, and its lowest chance is 7% on December 13.

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 Shanwei is increasing, starting the season at 1.1 inches, when it rarely exceeds 3.5 inches, and ending the season at 1.9 inches, when it rarely exceeds 5.2 inches or falls below 0.1 inches.

The lowest average 31-day accumulation is 0.9 inches on December 24.

Over the course of the winter in Shanwei, the length of the day is increasing. From the start to the end of the season, the length of the day increases by 50 minutes, implying an average daily increase of 34 seconds, and weekly increase of 3 minutes, 57 seconds.

The shortest day of the winter is December 20, with 10 hours, 44 minutes of daylight and the longest day is February 28, with 11 hours, 41 minutes of daylight.

The latest sunrise of the winter in Shanwei is 7:01 AM on January 14 and the earliest sunrise is 20 minutes earlier at 6:41 AM on February 28.

The earliest sunset is 5:32 PM on December 1 and the latest sunset is 49 minutes later at 6:21 PM on February 28.

Daylight saving time is not observed in Shanwei during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:34 AM and sets 13 hours, 32 minutes later, at 7:06 PM, while on December 21, the shortest day of the year, it rises at 6:54 AM and sets 10 hours, 44 minutes later, at 5:38 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 Shanwei is essentially constant during the winter, remaining within 5% of 6% throughout.

The lowest chance of a muggy day during the winter is 1% on January 7.

For reference, on July 11, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 7, the least muggy day of the year, there are muggy conditions 1% 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 Shanwei is decreasing during the winter, decreasing from 11.8 miles per hour to 10.5 miles per hour over the course of the season.

For reference, on December 11, the windiest day of the year, the daily average wind speed is 11.9 miles per hour, while on August 19, the calmest day of the year, the daily average wind speed is 8.2 miles per hour.

The highest daily average wind speed during the winter is 11.9 miles per hour on December 11.

The hourly average wind direction in Shanwei throughout the winter is predominantly from the east, with a peak proportion of 60% on February 27.

Shanwei is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Shanwei is gradually decreasing during the winter, falling by 3°F, from 71°F to 67°F, over the course of the season.

The lowest average surface water temperature during the winter is 67°F on January 15.

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).

Temperatures in Shanwei are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

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 Shanwei are very rapidly decreasing during the winter, decreasing by 7,307°F, from 7,891°F to 585°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 Shanwei is gradually increasing during the winter, rising by 0.5 kWh, from 4.2 kWh to 4.8 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 4.0 kWh on December 17.

For the purposes of this report, the geographical coordinates of Shanwei are 22.782 deg latitude, 115.348 deg longitude, and 30 ft elevation.

The topography within 2 miles of Shanwei contains significant variations in elevation, with a maximum elevation change of 614 feet and an average elevation above sea level of 40 feet. Within 10 miles contains significant variations in elevation (1,686 feet). Within 50 miles contains very significant variations in elevation (4,331 feet).

The area within 2 miles of Shanwei is covered by artificial surfaces (29%), grassland (23%), cropland (23%), and water (23%), within 10 miles by water (43%) and grassland (22%), and within 50 miles by water (51%) and trees (29%).