August Weather in Gulou ChinaDaily high temperatures decrease by 5°F, from 87°F to 81°F, rarely falling below 74°F or exceeding 91°F. Daily low temperatures decrease by 6°F, from 75°F to 69°F, rarely falling below 63°F or exceeding 78°F. For reference, on July 22, the hottest day of the year, temperatures in Gulou typically range from 75°F to 87°F, while on January 19, the coldest day of the year, they range from 32°F to 43°F. 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. Deltaville, United States (7,879 miles away) is the far-away foreign place with temperatures most similar to Gulou (view comparison). CloudsThe month of August in Gulou experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 64% to 55%. The clearest day of the month is August 31, with clear, mostly clear, or partly cloudy conditions 45% of the time. For reference, on July 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on December 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Gulou, the chance of a wet day over the course of August is rapidly decreasing, starting the month at 34% and ending it at 28%. For reference, the year's highest daily chance of a wet day is 48% on April 22, and its lowest chance is 14% on December 17. RainfallTo 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 Gulou is decreasing, starting the month at 4.3 inches, when it rarely exceeds 7.5 inches or falls below 1.3 inches, and ending the month at 3.5 inches, when it rarely exceeds 7.1 inches or falls below 0.8 inches. SunOver the course of August in Gulou, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 44 minutes, implying an average daily decrease of 1 minute, 27 seconds, and weekly decrease of 10 minutes, 10 seconds. The shortest day of the month is August 31, with 12 hours, 44 minutes of daylight and the longest day is August 1, with 13 hours, 28 minutes of daylight. The earliest sunrise of the month in Gulou is 5:57 AM on August 1 and the latest sunrise is 16 minutes later at 6:13 AM on August 31. The latest sunset is 7:25 PM on August 1 and the earliest sunset is 28 minutes earlier at 6:57 PM on August 31. Daylight saving time is not observed in Gulou during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:39 AM and sets 13 hours, 56 minutes later, at 7:35 PM, while on December 21, the shortest day of the year, it rises at 7:23 AM and sets 10 hours, 21 minutes later, at 5:44 PM. 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 August 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. 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.
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. The chance that a given day will be muggy in Gulou is rapidly decreasing during August, falling from 99% to 81% over the course of the month. For reference, on July 22, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time. 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 Gulou is essentially constant during August, remaining within 0.2 miles per hour of 5.8 miles per hour throughout. For reference, on March 9, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on August 13, the calmest day of the year, the daily average wind speed is 5.6 miles per hour. The lowest daily average wind speed during August is 5.6 miles per hour on August 14. The wind direction in Gulou during August is predominantly out of the south from August 1 to August 12 and the north from August 12 to August 31. 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 Gulou typically lasts for 9.0 months (273 days), from around March 4 to around December 3, rarely starting before February 13 or after March 24, and rarely ending before November 13 or after December 21. The month of August in Gulou is reliably fully within 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. The average accumulated growing degree days in Gulou are rapidly increasing during August, increasing by 832°F, from 2,824°F to 3,656°F, over the course of the month. 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 in Gulou is essentially constant during August, remaining within 0.1 kWh of 5.6 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Gulou are 28.167 deg latitude, 111.100 deg longitude, and 1,010 ft elevation. The topography within 2 miles of Gulou contains large variations in elevation, with a maximum elevation change of 2,044 feet and an average elevation above sea level of 1,296 feet. Within 10 miles contains large variations in elevation (4,846 feet). Within 50 miles also contains extreme variations in elevation (5,161 feet). The area within 2 miles of Gulou is covered by trees (84%), within 10 miles by trees (76%), and within 50 miles by trees (70%) and cropland (15%). Data SourcesThis report illustrates the typical weather in Gulou, 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, Changsha Datuopu Air Force Base, in our network suitable to be used as a proxy for the historical temperature and dew point records of Gulou. At a distance of 195 kilometers from Gulou, 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 Gulou to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 47%, making the weight assigned to the weather station 53%. 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. |