Average Weather in December in Hangzhou China
In Hangzhou, the month of December is characterized by falling daily high temperatures, with daily highs decreasing by 8°F, from 56°F to 48°F over the course of the month, and rarely exceeding 65°F or dropping below 39°F.
Daily low temperatures decrease by 7°F, from 41°F to 35°F, rarely falling below 27°F or exceeding 50°F.
For reference, on July 25, the hottest day of the year, temperatures in Hangzhou typically range from 79°F to 93°F, while on January 20, the coldest day of the year, they range from 34°F to 46°F.
Average High and Low Temperature in December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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.
Average Hourly Temperature in December
The month of December in Hangzhou experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 32% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 29% on December 13.
The clearest day of the month is December 13, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on July 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 77%, while on October 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.
Cloud Cover in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hangzhou, the chance of a wet day over the course of December is essentially constant, remaining around 17% throughout.
For reference, the year's highest daily chance of a wet day is 50% on June 22, and its lowest chance is 15% on December 18.
Over the course of December in Hangzhou, the chance of a day with only rain remains an essentially constant 16% 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 0% throughout.
Probability of Precipitation in December
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during December in Hangzhou is gradually decreasing, starting the month at 1.8 inches, when it rarely exceeds 3.9 inches or falls below 0.3 inches, and ending the month at 1.5 inches, when it rarely exceeds 2.8 inches or falls below 0.2 inches.
The lowest average 31-day accumulation is 1.4 inches on December 22.
Average Monthly Rainfall in December
Over the course of December in Hangzhou, the length of the day is essentially constant. The shortest day of the month is December 22, with 10 hours, 12 minutes of daylight and the longest day is December 1, with 10 hours, 20 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Hangzhou is 6:38 AM on December 1 and the latest sunrise is 18 minutes later at 6:55 AM on December 31.
The earliest sunset is 4:58 PM on December 3 and the latest sunset is 11 minutes later at 5:09 PM on December 31.
Daylight saving time is not observed in Hangzhou during 2017.
For reference, on June 21, the longest day of the year, the Sun rises at 4:58 AM and sets 14 hours, 6 minutes later, at 7:04 PM, while on December 21, the shortest day of the year, it rises at 6:51 AM and sets 10 hours, 12 minutes later, at 5:03 PM.
Sunrise & Sunset with Twilight in December
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 Hangzhou is essentially constant during December, remaining around 0% throughout.
The lowest chance of a muggy day during December is 0% on December 22.
For reference, on July 23, the muggiest day of the year, there are muggy conditions 99% of the time, while on December 12, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in December
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 Hangzhou is essentially constant during December, remaining around 3.9 miles per hour throughout.
For reference, on March 10, the windiest day of the year, the daily average wind speed is 4.4 miles per hour, while on June 24, the calmest day of the year, the daily average wind speed is 3.7 miles per hour.
Average Wind Speed in December
Wind Direction in December
Hangzhou 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 Hangzhou is rapidly decreasing during December, falling by 9°F, from 59°F to 51°F, over the course of the month.
Average Water Temperature in December
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 Hangzhou is essentially constant during December, remaining within 0.1 kWh of 3.0 kWh throughout.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Hangzhou are 30.294 deg latitude, 120.161 deg longitude, and 43 ft elevation.
The topography within 2 miles of Hangzhou contains only modest variations in elevation, with a maximum elevation change of 164 feet and an average elevation above sea level of 46 feet. Within 10 miles contains only modest variations in elevation (1,375 feet). Within 50 miles contains very significant variations in elevation (5,407 feet).
The area within 2 miles of Hangzhou is covered by artificial surfaces (96%), within 10 miles by cropland (43%) and artificial surfaces (29%), and within 50 miles by trees (42%) and cropland (35%).
This report illustrates the typical weather in Hangzhou year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There is only a single weather station, Hangzhou Xiaoshan International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Hangzhou.
At a distance of 27 kilometers from Hangzhou, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Hangzhou according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.