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Average Weather in Shanghai China

Shanghai has a warm humid temperate climate with hot summers and no dry season. The temperature typically varies from 35°F to 90°F over the course of the year, and is rarely below 27°F or above 96°F.

The hot season lasts for 92 days, from June 16 to September 16, with an average daily high temperature above 81°F. The hottest day of the year is July 28, with an average high of 90°F and low of 79°F.

The cool season lasts for 99 days, from December 5 to March 14, with an average daily high temperature below 55°F. The coldest day of the year is January 20, with an average low of 35°F and high of 45°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarmhothot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sun

The length of the day in Shanghai varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 7 minutes of daylight; the longest day is June 21, with 14 hours, 11 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 4:49 AM on June 12, and the latest sunrise is 2 hours, 4 minutes later at 6:53 AM on January 9. The earliest sunset is at 4:51 PM on December 3, and the latest sunset is 2 hours, 11 minutes later at 7:02 PM on July 1.

Daylight saving time (DST) is not observed in Shanghai during 2017.

Sunrise & Sunset with Twilight

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Clouds

In Shanghai, 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 Shanghai begins around August 31 and lasts for 198 days, ending around March 17. On December 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 27% of the time.

The cloudier part of the year begins around March 17 and lasts for 167 days, ending around August 31. On July 5, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% of the time.

Cloud Cover

clearerclearerclearerclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 575%Jul 575%Dec 1327%Dec 1327%Aug 3151%Aug 3151%Mar 1751%Mar 1751%overcastovercastmostly cloudymostly cloudypartly cloudypartly cloudymostly clearmostly clearclearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Shanghai varies significantly throughout the year.

The wetter season lasts 195 days, from February 26 to September 9, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 47% on June 26.

The drier season lasts 170 days, from September 9 to February 26. The smallest chance of a wet day is 13% 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 47% on June 26.

Daily Chance of Precipitation

wetwetdrydrydrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 2647%Jun 2647%Dec 1813%Dec 1813%Feb 2630%Feb 2630%Sep 931%Sep 931%mixedmixedrainrainsnowsnow
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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. Shanghai experiences very significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Shanghai. The most rain falls during the 31 days centered around June 25, with an average total accumulation of 6.8 inches.

The least rain falls around December 20, with and average total accumulation of 1.3 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Humidity

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.

Shanghai experiences very significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 142 days, from May 18 to October 7, 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 100% of the time.

The least muggy day of the year is January 29, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

muggymuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 290%Jan 290%100%Jul 25100%Jul 25May 1825%May 1825%Oct 726%Oct 726%miserablemiserableoppressiveoppressivemuggymuggycomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Shanghai does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 6.1 miles per hour throughout.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Shanghai varies throughout the year.

The wind is most often from the east for 11 days, from March 31 to April 11; for 31 days, from May 21 to June 21; and for 49 days, from August 11 to September 29, with a peak percentage of 44% on September 13. The wind is most often from the south for 40 days, from April 11 to May 21 and for 51 days, from June 21 to August 11, with a peak percentage of 53% on July 21. The wind is most often from the north for 183 days, from September 29 to March 31, with a peak percentage of 57% on January 19.

Wind Direction

NNEESSEESSEENN0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecsouthsoutheasteastnorthnorthwestwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Shanghai 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 100 days, from June 25 to October 3, with an average temperature above 74°F. The day of the year with the warmest water is August 8, with an average temperature of 82°F.

The time of year with cooler water lasts for 102 days, from December 24 to April 5, with an average temperature below 52°F. The day of the year with the coolest water is February 10, with an average temperature of 45°F.

Average Water Temperature

The daily average water temperature (purple line) with percentile bands, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 59 days, from April 21 to June 19, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest day of the year is May 22, with an average of 6.0 kWh.

The darker period of the year lasts for 93 days, from November 7 to February 8, 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

brightbrightdarkdarkdarkdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhJanFebMarAprMayJunJulAugSepOctNovDecMay 226.0 kWhMay 226.0 kWhJan 32.9 kWhJan 32.9 kWhNov 73.5 kWhNov 73.5 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

The area within 2 miles of Shanghai is covered by artificial surfaces (98%), within 10 miles by artificial surfaces (85%), and within 50 miles by water (50%) and cropland (35%).

The topography within 2 miles of Shanghai contains only modest variations in elevation, with a maximum elevation change of 262 feet, and an average elevation above sea level of 40 feet. Within 10 miles also contains only modest variations in elevation (335 feet). Within 50 miles contains significant variations in elevation (719 feet).

Data Sources

This report illustrates the typical weather in Shanghai, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Shanghai.

For each station, the records are are corrected for the elevation difference between that station and Shanghai according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Shanghai is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Shanghai and a given station.

The stations contributing to this reconstruction are: Shanghai Hongqiao International Airport (83%, 12 kilometers, west) and Shanghai Pudong International Airport (17%, 34 kilometers, east).

Other Data

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 .