Average Weather in Hangzhou China
In Hangzhou, the temperature typically varies from 34°F to 93°F over the course of the year, and is rarely below 26°F or above 100°F.
The hot season lasts for 2.9 months, from June 14 to September 11, with an average daily high temperature above 83°F. The hottest day of the year is July 25, with an average high of 93°F and low of 79°F.
The cool season lasts for 3.1 months, from December 3 to March 7, with an average daily high temperature below 55°F. The coldest day of the year is January 20, with an average low of 34°F and high of 46°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
The length of the day in Hangzhou varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 12 minutes of daylight; the longest day is June 21, with 14 hours, 6 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:56 AM on June 11, and the latest sunrise is 2 hours, 0 minutes later at 6:57 AM on January 10. The earliest sunset is at 4:58 PM on December 3, and the latest sunset is 2 hours, 7 minutes later at 7:05 PM on July 1.
Daylight saving time (DST) is not observed in Hangzhou during 2017.
Sunrise & Sunset with Twilight
In Hangzhou, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Hangzhou begins around September 1 and lasts for 6.4 months, ending around March 13. On October 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 72% of the time, and overcast or mostly cloudy 28% of the time.
The cloudier part of the year begins around March 13 and lasts for 5.6 months, ending around September 1. On July 4, the cloudiest day of the year, the sky is overcast or mostly cloudy 77% of the time, and clear, mostly clear, or partly cloudy 23% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Hangzhou varies significantly throughout the year.
The wetter season lasts 6.7 months, from February 19 to September 10, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 50% on June 22.
The drier season lasts 5.3 months, from September 10 to February 19. The smallest chance of a wet day is 15% on December 18.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 50% on June 22.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day in the year. Hangzhou experiences very significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Hangzhou. The most rain falls during the 31 days centered around June 24, with an average total accumulation of 7.9 inches.
The least rain falls around December 22, with and average total accumulation of 1.4 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Hangzhou does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
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.
Hangzhou experiences very significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.8 months, from May 13 to October 6, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is July 25, with muggy conditions 99% of the time.
The least muggy day of the year is December 22, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
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 does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 4.0 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Hangzhou varies throughout the year.
The wind is most often from the east for 1.1 months, from March 12 to April 14; for 4.0 weeks, from May 20 to June 17; and for 2.1 months, from August 10 to October 13, with a peak percentage of 43% on September 11. The wind is most often from the south for 1.2 months, from April 14 to May 20 and for 1.8 months, from June 17 to August 10, with a peak percentage of 48% on July 14. The wind is most often from the north for 5.0 months, from October 13 to March 12, with a peak percentage of 50% on December 11.
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 water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.4 months, from June 22 to October 2, with an average temperature above 75°F. The day of the year with the warmest water is August 6, with an average temperature of 82°F.
The time of year with cooler water lasts for 3.4 months, from December 24 to April 5, with an average temperature below 52°F. The day of the year with the coolest water is February 9, with an average temperature of 45°F.
Average Water Temperature
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 experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 1.8 months, from April 24 to June 19, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is May 22, with an average of 5.8 kWh.
The darker period of the year lasts for 3.0 months, from November 9 to February 10, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is January 3, with an average of 2.9 kWh.
Average Daily Incident Shortwave Solar Energy
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 very significant variations in elevation (1,375 feet). Within 50 miles contains extreme 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, 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 .