Average Weather in Changfu China
In Changfu, the summers are hot, oppressive, and mostly cloudy; the winters are cold and mostly clear; and it is wet year round. Over the course of the year, the temperature typically varies from 37°F to 93°F and is rarely below 30°F or above 98°F.
Based on the tourism score, the best time of year to visit Changfu for warm-weather activities is from late September to late October.
The hot season lasts for 3.3 months, from June 8 to September 17, with an average daily high temperature above 84°F. The hottest day of the year is July 23, with an average high of 93°F and low of 80°F.
The cool season lasts for 3.0 months, from December 4 to March 5, with an average daily high temperature below 57°F. The coldest day of the year is January 20, with an average low of 37°F and high of 49°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
In Changfu, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Changfu begins around September 4 and lasts for 6.4 months, ending around March 18. On October 22, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.
The cloudier part of the year begins around March 18 and lasts for 5.6 months, ending around September 4. 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 22% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Changfu varies significantly throughout the year.
The wetter season lasts 6.4 months, from February 12 to August 26, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 52% on March 27.
The drier season lasts 5.5 months, from August 26 to February 12. The smallest chance of a wet day is 14% on December 17.
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 52% on March 27.
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 of the year. Changfu experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Changfu. The most rain falls during the 31 days centered around June 15, with an average total accumulation of 9.8 inches.
The least rain falls around December 19, with an average total accumulation of 1.5 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Changfu 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
The length of the day in Changfu varies over the course of the year. In 2020, the shortest day is December 21, with 10 hours, 22 minutes of daylight; the longest day is June 21, with 13 hours, 55 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:21 AM on June 10, and the latest sunrise is 1 hour, 49 minutes later at 7:11 AM on January 12. The earliest sunset is at 5:22 PM on December 1, and the latest sunset is 1 hour, 56 minutes later at 7:19 PM on June 30.
Daylight saving time (DST) is not observed in Changfu during 2020.
Sunrise & Sunset with Twilight
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.
Changfu experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.7 months, from April 19 to October 10, 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 December 30, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Changfu experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.9 months, from January 14 to May 10, with average wind speeds of more than 6.8 miles per hour. The windiest day of the year is March 9, with an average hourly wind speed of 7.6 miles per hour.
The calmer time of year lasts for 8.1 months, from May 10 to January 14. The calmest day of the year is August 13, with an average hourly wind speed of 6.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Changfu varies throughout the year.
The wind is most often from the south for 3.0 weeks, from April 24 to May 15 and for 2.5 months, from May 30 to August 13, with a peak percentage of 63% on July 9. The wind is most often from the north for 2.1 weeks, from May 15 to May 30 and for 8.4 months, from August 13 to April 24, with a peak percentage of 33% on May 16.
Best Time of Year to Visit
To characterize how pleasant the weather is in Changfu 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 time of year to visit Changfu for general outdoor tourist activities is from late September to late October, with a peak score in the first week of October.
The 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 Changfu for hot-weather activities is from late August to late September, with a peak score in the second week of September.
For 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.
Definitions 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 Changfu typically lasts for 10 months (318 days), from around February 6 to around December 20, rarely starting after March 5, or ending before November 28.
Time Spent in Various Temperature Bands and the Growing Season
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 Changfu should appear around February 22, only rarely appearing before February 6 or after March 14.
Growing Degree Days
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 5.0 months, from April 27 to September 27, with an average daily incident shortwave energy per square meter above 5.0 kWh. The brightest day of the year is May 31, with an average of 5.5 kWh.
The darker period of the year lasts for 3.1 months, from November 11 to February 16, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest day of the year is January 7, with an average of 3.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Changfu are 27.920 deg latitude, 115.306 deg longitude, and 141 ft elevation.
The topography within 2 miles of Changfu contains only modest variations in elevation, with a maximum elevation change of 115 feet and an average elevation above sea level of 141 feet. Within 10 miles contains only modest variations in elevation (771 feet). Within 50 miles contains significant variations in elevation (3,990 feet).
The area within 2 miles of Changfu is covered by cropland (72%), within 10 miles by cropland (58%) and trees (16%), and within 50 miles by trees (48%) and cropland (32%).
This report illustrates the typical weather in Changfu, 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, Nanchang Changbei International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Changfu.
At a distance of 120 kilometers from Changfu, 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 Changfu 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 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 aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.