Average Weather in August in Xiwai China
Daily high temperatures decrease by 4°F, from 91°F to 87°F, rarely falling below 80°F or exceeding 96°F.
Daily low temperatures decrease by 5°F, from 75°F to 70°F, rarely falling below 65°F or exceeding 79°F.
For reference, on July 27, the hottest day of the year, temperatures in Xiwai typically range from 75°F to 91°F, while on January 12, the coldest day of the year, they range from 34°F to 51°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, 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 August
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
The month of August in Xiwai experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month.
The clearest day of the month is August 1, with clear, mostly clear, or partly cloudy conditions 52% of the time.
For reference, on July 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 57%, while on January 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover Categories in August
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. In Xiwai, the chance of a wet day over the course of August is essentially constant, remaining around 39% throughout.
For reference, the year's highest daily chance of a wet day is 48% on July 8, and its lowest chance is 4% on January 22.
Probability of Precipitation in August
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during August in Xiwai is essentially constant, remaining about 5.9 inches throughout, and rarely exceeding 10.6 inches or falling below 2.2 inches.
Average Monthly Rainfall in August
Over the course of August in Xiwai, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 49 minutes, implying an average daily decrease of 1 minute, 39 seconds, and weekly decrease of 11 minutes, 31 seconds.
The shortest day of the month is August 31, with 12 hours, 50 minutes of daylight and the longest day is August 1, with 13 hours, 39 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Xiwai is 6:06 AM on August 1 and the latest sunrise is 19 minutes later at 6:25 AM on August 31.
The latest sunset is 7:45 PM on August 1 and the earliest sunset is 31 minutes earlier at 7:15 PM on August 31.
Daylight saving time is not observed in Xiwai during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 5:46 AM and sets 14 hours, 11 minutes later, at 7:57 PM, while on December 21, the shortest day of the year, it rises at 7:44 AM and sets 10 hours, 7 minutes later, at 5:51 PM.
Sunrise & Sunset with Twilight in August
The figure below presents a compact representation of key lunar data for August 2021. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in August
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.
The chance that a given day will be muggy in Xiwai is very rapidly decreasing during August, falling from 98% to 73% over the course of the month.
For reference, on July 23, the muggiest day of the year, there are muggy conditions 98% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August
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 Xiwai is essentially constant during August, remaining within 0.1 miles per hour of 5.1 miles per hour throughout.
For reference, on May 1, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on January 1, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.
The lowest daily average wind speed during August is 5.0 miles per hour on August 15.
Average Wind Speed in August
The hourly average wind direction in Xiwai throughout August is predominantly from the east, with a peak proportion of 51% on August 21.
Wind Direction in August
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 Xiwai typically lasts for 9.9 months (299 days), from around February 15 to around December 11, rarely starting before January 22 or after March 8, and rarely ending before November 21 or after December 31.
The month of August in Xiwai is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
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
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.
The average accumulated growing degree days in Xiwai are very rapidly increasing during August, increasing by 900°F, from 3,179°F to 4,079°F, over the course of the month.
Growing Degree Days in August
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 in Xiwai is gradually decreasing during August, falling by 0.9 kWh, from 6.0 kWh to 5.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Xiwai are 31.217 deg latitude, 107.475 deg longitude, and 1,030 ft elevation.
The topography within 2 miles of Xiwai contains very significant variations in elevation, with a maximum elevation change of 1,621 feet and an average elevation above sea level of 1,168 feet. Within 10 miles contains very significant variations in elevation (2,641 feet). Within 50 miles contains large variations in elevation (4,895 feet).
The area within 2 miles of Xiwai is covered by artificial surfaces (42%), cropland (35%), and shrubs (10%), within 10 miles by cropland (36%) and trees (28%), and within 50 miles by cropland (38%) and trees (32%).
This report illustrates the typical weather in Xiwai, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Xiwai is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.
The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Xiwai, according to the International Standard Atmosphere .
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.
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 © 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.