Climate and Average Weather Year Round in Chengdong ChinaIn Chengdong, the summers are hot, muggy, wet, and mostly cloudy and the winters are very cold and partly cloudy. Over the course of the year, the temperature typically varies from 29°F to 91°F and is rarely below 21°F or above 98°F. Based on the tourism score, the best times of year to visit Chengdong for warm-weather activities are from late May to early June and from late August to early October. Average Temperature in ChengdongThe hot season lasts for 3.8 months, from May 21 to September 14, with an average daily high temperature above 82°F. The hottest month of the year in Chengdong is July, with an average high of 90°F and low of 76°F. The cold season lasts for 3.0 months, from December 2 to March 3, with an average daily high temperature below 54°F. The coldest month of the year in Chengdong is January, with an average low of 29°F and high of 45°F.
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. Yukon, United States (7,131 miles away) and Jonesboro, United States (7,307 miles) are the far-away foreign places with temperatures most similar to Chengdong (view comparison). CloudsIn Chengdong, 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 Chengdong begins around August 14 and lasts for 6.5 months, ending around February 28. The clearest month of the year in Chengdong is December, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time. The cloudier part of the year begins around February 28 and lasts for 5.5 months, ending around August 14. The cloudiest month of the year in Chengdong is July, during which on average the sky is overcast or mostly cloudy 66% of the time.
PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Chengdong varies significantly throughout the year. The wetter season lasts 3.0 months, from June 7 to September 6, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Chengdong is July, with an average of 12.2 days with at least 0.04 inches of precipitation. The drier season lasts 9.0 months, from September 6 to June 7. The month with the fewest wet days in Chengdong is December, with an average of 3.3 days with at least 0.04 inches of precipitation. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Chengdong is July, with an average of 12.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 46% on July 4.
RainfallTo 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 of the year. Chengdong experiences extreme seasonal variation in monthly rainfall. Rain falls throughout the year in Chengdong. The month with the most rain in Chengdong is July, with an average rainfall of 7.0 inches. The month with the least rain in Chengdong is December, with an average rainfall of 0.9 inches.
SunThe length of the day in Chengdong varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 1 minute of daylight; the longest day is June 21, with 14 hours, 18 minutes of daylight.
The earliest sunrise is at 4:50 AM on June 12, and the latest sunrise is 2 hours, 11 minutes later at 7:00 AM on January 9. The earliest sunset is at 4:52 PM on December 4, and the latest sunset is 2 hours, 17 minutes later at 7:09 PM on June 29. Daylight saving time (DST) is not observed in Chengdong during 2024. 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. MoonThe figure below presents a compact representation of key lunar data for 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. HumidityWe 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. Chengdong experiences extreme seasonal variation in the perceived humidity. The muggier period of the year lasts for 4.0 months, from May 29 to September 29, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The month with the most muggy days in Chengdong is July, with 29.9 days that are muggy or worse. The month with the fewest muggy days in Chengdong is January, with 0.0 days that are muggy or worse.
WindThis 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 Chengdong experiences mild seasonal variation over the course of the year. The windier part of the year lasts for 4.0 months, from February 10 to June 10, with average wind speeds of more than 8.9 miles per hour. The windiest month of the year in Chengdong is March, with an average hourly wind speed of 9.5 miles per hour. The calmer time of year lasts for 8.0 months, from June 10 to February 10. The calmest month of the year in Chengdong is October, with an average hourly wind speed of 8.2 miles per hour.
The predominant average hourly wind direction in Chengdong varies throughout the year. The wind is most often from the east for 1.0 months, from March 12 to April 12; for 1.6 months, from May 14 to July 3; and for 2.8 months, from July 30 to October 23, with a peak percentage of 48% on September 12. The wind is most often from the south for 1.1 months, from April 12 to May 14 and for 3.9 weeks, from July 3 to July 30, with a peak percentage of 43% on July 21. The wind is most often from the north for 4.6 months, from October 23 to March 12, with a peak percentage of 46% on January 1. Water TemperatureChengdong 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 3.1 months, from June 27 to September 30, with an average temperature above 73°F. The month of the year in Chengdong with the warmest water is August, with an average temperature of 80°F. The time of year with cooler water lasts for 3.4 months, from December 22 to April 5, with an average temperature below 51°F. The month of the year in Chengdong with the coolest water is February, with an average temperature of 44°F.
Best Time of Year to VisitTo characterize how pleasant the weather is in Chengdong throughout the year, we compute two travel scores. The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Chengdong for general outdoor tourist activities are from late May to early June and from late August to early October, with a peak score in the third week of September. Tourism Score in ChengdongThe beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Chengdong for hot-weather activities is from late July to early September, with a peak score in the third week of August. Beach/Pool Score in ChengdongMethodologyFor each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more. Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter. Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter. Growing SeasonDefinitions 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). The growing season in Chengdong typically lasts for 8.0 months (244 days), from around March 18 to around November 17, rarely starting before February 28 or after April 6, and rarely ending before October 30 or after December 5. 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. Based on growing degree days alone, the first spring blooms in Chengdong should appear around March 20, only rarely appearing before March 6 or after April 5. Solar EnergyThis 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 2.2 months, from April 17 to June 23, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest month of the year in Chengdong is May, with an average of 6.0 kWh. The darker period of the year lasts for 3.0 months, from November 6 to February 7, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year in Chengdong is December, with an average of 2.8 kWh.
TopographyFor the purposes of this report, the geographical coordinates of Chengdong are 32.532 deg latitude, 120.500 deg longitude, and 16 ft elevation. The topography within 2 miles of Chengdong is essentially flat, with a maximum elevation change of 75 feet and an average elevation above sea level of 16 feet. Within 10 miles is also essentially flat (95 feet). Within 50 miles is essentially flat (974 feet). The area within 2 miles of Chengdong is covered by cropland (88%) and artificial surfaces (11%), within 10 miles by cropland (93%), and within 50 miles by cropland (67%) and water (21%). Data SourcesThis report illustrates the typical weather in Chengdong, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere is only a single weather station, Shanghai Hongqiao International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Chengdong. At a distance of 168 kilometers from Chengdong, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere . The weight assigned to the MERRA-2 value depends on the distance from Chengdong to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 27%, making the weight assigned to the weather station 73%. Other DataAll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Please review our full terms contained on our Terms of Service page. |