Climate and Average Weather Year Round in Zhangjiagang ChinaIn Zhangjiagang, the summers are hot, oppressive, wet, and mostly cloudy and the winters are very cold and partly cloudy. Over the course of the year, the temperature typically varies from 31°F to 91°F and is rarely below 22°F or above 99°F. Based on the tourism score, the best times of year to visit Zhangjiagang for warm-weather activities are from late May to early June and from early September to mid October. Average Temperature in ZhangjiagangThe hot season lasts for 3.5 months, from May 29 to September 13, with an average daily high temperature above 82°F. The hottest month of the year in Zhangjiagang is July, with an average high of 90°F and low of 77°F. The cold season lasts for 3.1 months, from December 2 to March 5, with an average daily high temperature below 54°F. The coldest month of the year in Zhangjiagang is January, with an average low of 31°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. Oklahoma City, United States (7,179 miles away); Lake City, United States (7,356 miles); and Gloucester Point, United States (7,544 miles) are the far-away foreign places with temperatures most similar to Zhangjiagang (view comparison). CloudsIn Zhangjiagang, 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 Zhangjiagang begins around August 24 and lasts for 6.4 months, ending around March 6. The clearest month of the year in Zhangjiagang is December, during which on average the sky is clear, mostly clear, or partly cloudy 69% of the time. The cloudier part of the year begins around March 6 and lasts for 5.6 months, ending around August 24. The cloudiest month of the year in Zhangjiagang is July, during which on average the sky is overcast or mostly cloudy 67% 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 Zhangjiagang varies significantly throughout the year. The wetter season lasts 3.0 months, from June 7 to September 6, with a greater than 29% chance of a given day being a wet day. The month with the most wet days in Zhangjiagang is July, with an average of 12.3 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 Zhangjiagang is December, with an average of 3.7 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 Zhangjiagang is July, with an average of 12.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 47% on July 3.
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. Zhangjiagang experiences extreme seasonal variation in monthly rainfall. Rain falls throughout the year in Zhangjiagang. The month with the most rain in Zhangjiagang is June, with an average rainfall of 6.2 inches. The month with the least rain in Zhangjiagang is December, with an average rainfall of 1.0 inches.
SunThe length of the day in Zhangjiagang varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 4 minutes of daylight; the longest day is June 21, with 14 hours, 14 minutes of daylight.
The earliest sunrise is at 4:51 AM on June 11, and the latest sunrise is 2 hours, 7 minutes later at 6:58 AM on January 10. The earliest sunset is at 4:53 PM on December 4, and the latest sunset is 2 hours, 14 minutes later at 7:07 PM on June 29. Daylight saving time (DST) is not observed in Zhangjiagang 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. Zhangjiagang experiences extreme seasonal variation in the perceived humidity. The muggier period of the year lasts for 4.3 months, from May 23 to October 1, 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 Zhangjiagang is July, with 30.4 days that are muggy or worse. The month with the fewest muggy days in Zhangjiagang 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 Zhangjiagang experiences mild seasonal variation over the course of the year. The windier part of the year lasts for 4.0 months, from February 9 to June 9, with average wind speeds of more than 9.0 miles per hour. The windiest month of the year in Zhangjiagang 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 9 to February 9. The calmest month of the year in Zhangjiagang is October, with an average hourly wind speed of 8.3 miles per hour.
The predominant average hourly wind direction in Zhangjiagang varies throughout the year. The wind is most often from the east for 1.0 months, from March 12 to April 13; for 1.4 months, from May 15 to June 28; and for 2.7 months, from July 31 to October 22, with a peak percentage of 47% on September 12. The wind is most often from the south for 1.1 months, from April 13 to May 15 and for 1.1 months, from June 28 to July 31, with a peak percentage of 43% on July 21. The wind is most often from the north for 4.7 months, from October 22 to March 12, with a peak percentage of 46% on January 1. Water TemperatureZhangjiagang 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 3.3 months, from June 27 to October 4, with an average temperature above 73°F. The month of the year in Zhangjiagang 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 25 to April 7, with an average temperature below 51°F. The month of the year in Zhangjiagang 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 Zhangjiagang 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 Zhangjiagang for general outdoor tourist activities are from late May to early June and from early September to mid October, with a peak score in the last week of September. Tourism Score in ZhangjiagangThe 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 Zhangjiagang for hot-weather activities is from late July to early September, with a peak score in the last week of August. Beach/Pool Score in ZhangjiagangMethodologyFor 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 Zhangjiagang typically lasts for 8.4 months (256 days), from around March 12 to around November 23, rarely starting before February 24 or after March 31, and rarely ending before November 5 or after December 10. 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 Zhangjiagang should appear around March 18, only rarely appearing before March 3 or after April 4. 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 2.0 months, from April 19 to June 19, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest month of the year in Zhangjiagang is May, with an average of 5.9 kWh. The darker period of the year lasts for 3.1 months, from November 6 to February 8, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest month of the year in Zhangjiagang is December, with an average of 2.9 kWh.
TopographyFor the purposes of this report, the geographical coordinates of Zhangjiagang are 31.865 deg latitude, 120.539 deg longitude, and 43 ft elevation. The topography within 2 miles of Zhangjiagang is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 25 feet. Within 10 miles is essentially flat (692 feet). Within 50 miles contains significant variations in elevation (1,293 feet). The area within 2 miles of Zhangjiagang is covered by artificial surfaces (74%) and cropland (22%), within 10 miles by cropland (68%) and artificial surfaces (26%), and within 50 miles by cropland (62%) and water (19%). Data SourcesThis report illustrates the typical weather in Zhangjiagang, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Zhangjiagang. For each station, the records are corrected for the elevation difference between that station and Zhangjiagang 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 Zhangjiagang is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Zhangjiagang and a given station. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Zhangjiagang and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. 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. |