Average Weather in Beijing China
Beijing has a cold semi-arid steppe climate. The temperature typically varies from 17°F to 88°F over the course of the year, and is rarely below 10°F or above 96°F.
The hot season lasts for 135 days, from May 8 to September 20, with an average daily high temperature above 77°F. The hottest day of the year is July 16, with an average high of 88°F and low of 73°F.
The cold season lasts for 93 days, from November 24 to February 25, with an average daily high temperature below 45°F. The coldest day of the year is January 11, with an average low of 17°F and high of 34°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 Beijing varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 20 minutes of daylight; the longest day is June 21, with 15 hours, 0 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:45 AM on June 14, and the latest sunrise is 2 hours, 51 minutes later at 7:36 AM on January 6. The earliest sunset is at 4:49 PM on December 8, and the latest sunset is 2 hours, 58 minutes later at 7:47 PM on June 27.
Daylight saving time (DST) is not observed in Beijing during 2017.
Sunrise & Sunset with Twilight
In Beijing, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Beijing begins around September 7 and lasts for 171 days, ending around February 25. On December 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.
The cloudier part of the year begins around February 25 and lasts for 194 days, ending around September 7. On June 18, the cloudiest day of the year, the sky is overcast or mostly cloudy 42% of the time, and clear, mostly clear, or partly cloudy 58% 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 Beijing varies significantly throughout the year.
The wetter season lasts 103 days, from June 4 to September 15, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 39% on July 28.
The drier season lasts 262 days, from September 15 to June 4. The smallest chance of a wet day is 0% on December 11.
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 in Beijing changes throughout the year.
Rain alone is the most common for 302 days, from February 4 to December 3. The highest chance of a day with rain alone is 39% on July 28.
Snow alone is the most common for 63 days, from December 3 to February 4. The highest chance of a day with snow alone is 1% on January 4.
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. Beijing experiences very significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 203 days, from April 8 to October 28, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 24, with an average total accumulation of 5.4 inches.
The rainless period of the year lasts for 162 days, from October 28 to April 8. The least rain falls around January 12, with and average total accumulation of 0.0 inches.
Average Monthly Rainfall
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.
Beijing experiences very significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 90 days, from June 13 to September 11, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The muggiest day of the year is July 29, with muggy conditions 88% of the time.
The least muggy day of the year is February 17, 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 Beijing experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 155 days, from January 6 to June 10, with average wind speeds of more than 3.8 miles per hour. The windiest day of the year is April 20, with an average hourly wind speed of 4.9 miles per hour.
The calmer time of year lasts for 210 days, from June 10 to January 6. The calmest day of the year is August 16, with an average hourly wind speed of 2.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Beijing varies throughout the year.
The wind is most often from the south for 166 days, from April 17 to September 30, with a peak percentage of 53% on July 27. The wind is most often from the north for 199 days, from September 30 to April 17, with a peak percentage of 54% on January 17.
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 106 days, from April 13 to July 28, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is May 30, with an average of 6.7 kWh.
The darker period of the year lasts for 96 days, from November 1 to February 5, with an average daily incident shortwave energy per square meter below 3.2 kWh. The darkest day of the year is December 19, with an average of 2.3 kWh.
Average Daily Incident Shortwave Solar Energy
The area within 2 miles of Beijing is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (91%), and within 50 miles by cropland (45%) and trees (27%).
The topography within 2 miles of Beijing contains only modest variations in elevation, with a maximum elevation change of 154 feet, and an average elevation above sea level of 169 feet. Within 10 miles also contains only modest variations in elevation (344 feet). Within 50 miles contains extreme variations in elevation (6,942 feet).
This report illustrates the typical weather in Beijing, 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 Beijing.
For each station, the records are are corrected for the elevation difference between that station and Beijing 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 Beijing is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Beijing and a given station.
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 .