Average Weather in Xiadao China
In Xiadao, the summers are sweltering, oppressive, and overcast; the winters are cold and partly cloudy; and it is wet year round. Over the course of the year, the temperature typically varies from 39°F to 99°F and is rarely below 28°F or above 107°F.
Based on the tourism score, the best time of year to visit Xiadao for warm-weather activities is from mid September to late October.
The hot season lasts for 3.0 months, from June 12 to September 13, with an average daily high temperature above 91°F. The hottest day of the year is July 15, with an average high of 99°F and low of 76°F.
The cool season lasts for 3.1 months, from December 1 to March 5, with an average daily high temperature below 67°F. The coldest day of the year is January 20, with an average low of 39°F and high of 59°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
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
In Xiadao, 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 Xiadao begins around September 13 and lasts for 6.3 months, ending around March 22. On October 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.
The cloudier part of the year begins around March 22 and lasts for 5.7 months, ending around September 13. On June 21, the cloudiest day of the year, the sky is overcast or mostly cloudy 79% of the time, and clear, mostly clear, or partly cloudy 21% 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 Xiadao varies significantly throughout the year.
The wetter season lasts 6.7 months, from February 20 to September 11, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 58% on June 10.
The drier season lasts 5.3 months, from September 11 to February 20. The smallest chance of a wet day is 12% on December 19.
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 58% on June 10.
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. Xiadao experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Xiadao. The most rain falls during the 31 days centered around June 11, with an average total accumulation of 9.4 inches.
The least rain falls around December 25, with an average total accumulation of 1.4 inches.
Average Monthly Rainfall
The length of the day in Xiadao varies over the course of the year. In 2019, the shortest day is December 22, with 10 hours, 28 minutes of daylight; the longest day is June 21, with 13 hours, 49 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:13 AM on June 10, and the latest sunrise is 1 hour, 44 minutes later at 6:56 AM on January 13. The earliest sunset is at 5:13 PM on December 1, and the latest sunset is 1 hour, 50 minutes later at 7:04 PM on July 2.
Daylight saving time (DST) is not observed in Xiadao during 2019.
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.
Xiadao experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.6 months, from April 21 to October 9, 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 13, with muggy conditions 98% of the time.
The least muggy day of the year is January 7, 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 Xiadao does not vary significantly over the course of the year, remaining within 0.2 miles per hour of 2.9 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Xiadao varies throughout the year.
The wind is most often from the east for 4.0 months, from February 8 to June 7 and for 3.6 months, from August 4 to November 21, with a peak percentage of 56% on October 9. The wind is most often from the south for 1.9 months, from June 7 to August 4, with a peak percentage of 52% on July 8. The wind is most often from the north for 2.6 months, from November 21 to February 8, with a peak percentage of 50% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Xiadao 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 Xiadao for general outdoor tourist activities is from mid 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 Xiadao for hot-weather activities is from mid July to late September, with a peak score in the first 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 Xiadao typically lasts for 9.5 months (287 days), from around February 22 to around December 6, rarely starting before January 30 or after March 15, and rarely ending before November 14 or after December 29.
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 Xiadao should appear around January 29, only rarely appearing before January 18 or after February 12.
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 2.6 months, from June 19 to September 6, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is July 14, with an average of 6.0 kWh.
The darker period of the year lasts for 3.2 months, from November 13 to February 21, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest day of the year is January 11, with an average of 3.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Xiadao are 26.575 deg latitude, 118.269 deg longitude, and 515 ft elevation.
The topography within 2 miles of Xiadao contains very significant variations in elevation, with a maximum elevation change of 928 feet and an average elevation above sea level of 397 feet. Within 10 miles contains very significant variations in elevation (3,468 feet). Within 50 miles also contains extreme variations in elevation (5,919 feet).
The area within 2 miles of Xiadao is covered by trees (48%), water (20%), and cropland (10%), within 10 miles by trees (69%) and grassland (12%), and within 50 miles by trees (70%) and grassland (15%).
This report illustrates the typical weather in Xiadao, 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, Fuzhou Changle International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Xiadao.
At a distance of 156 kilometers from Xiadao, 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 Xiadao to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 11%, making the weight assigned to the weather station 89%.
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 .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The 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.