September Weather in Erdaohe ChinaDaily high temperatures decrease by 9°F, from 77°F to 68°F, rarely falling below 60°F or exceeding 85°F. Daily low temperatures decrease by 9°F, from 59°F to 50°F, rarely falling below 45°F or exceeding 64°F. For reference, on July 26, the hottest day of the year, temperatures in Erdaohe typically range from 65°F to 84°F, while on January 9, the coldest day of the year, they range from 23°F to 41°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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. Blacksburg, Virginia, United States (7,553 miles away) and Belgrade, Serbia (4,490 miles) are the far-away foreign places with temperatures most similar to Erdaohe (view comparison). CloudsThe month of September in Erdaohe experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the month. The highest chance of overcast or mostly cloudy conditions is 47% on September 11. The clearest day of the month is September 28, with clear, mostly clear, or partly cloudy conditions 55% of the time. For reference, on March 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on December 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Erdaohe, the chance of a wet day over the course of September is decreasing, starting the month at 36% and ending it at 32%. For reference, the year's highest daily chance of a wet day is 42% on July 7, and its lowest chance is 1% on January 13. 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 September in Erdaohe is rapidly decreasing, starting the month at 5.6 inches, when it rarely exceeds 9.5 inches or falls below 2.6 inches, and ending the month at 3.8 inches, when it rarely exceeds 7.0 inches or falls below 1.5 inches. The highest average 31-day accumulation is 5.7 inches on September 4. SunOver the course of September in Erdaohe, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 59 minutes, implying an average daily decrease of 2 minutes, 1 second, and weekly decrease of 14 minutes, 9 seconds. The shortest day of the month is September 30, with 11 hours, 52 minutes of daylight and the longest day is September 1, with 12 hours, 51 minutes of daylight. The earliest sunrise of the month in Erdaohe is 6:26 AM on September 1 and the latest sunrise is 19 minutes later at 6:46 AM on September 30. The latest sunset is 7:17 PM on September 1 and the earliest sunset is 39 minutes earlier at 6:38 PM on September 30. Daylight saving time is not observed in Erdaohe during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:43 AM and sets 14 hours, 21 minutes later, at 8:04 PM, while on December 21, the shortest day of the year, it rises at 7:52 AM and sets 9 hours, 57 minutes later, at 5:49 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 September 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 Erdaohe is rapidly decreasing during September, falling from 12% to 1% over the course of the month. For reference, on July 29, the muggiest day of the year, there are muggy conditions 49% 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 Erdaohe is essentially constant during September, remaining within 0.1 miles per hour of 4.3 miles per hour throughout. For reference, on April 21, the windiest day of the year, the daily average wind speed is 5.6 miles per hour, while on October 19, the calmest day of the year, the daily average wind speed is 4.2 miles per hour. The highest daily average wind speed during September is 4.4 miles per hour on September 16. The hourly average wind direction in Erdaohe throughout September is predominantly from the east, with a peak proportion of 40% on September 1. 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 Erdaohe typically lasts for 7.2 months (222 days), from around March 28 to around November 5, rarely starting before March 10 or after April 15, and rarely ending before October 17 or after November 22. The month of September in Erdaohe 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 Erdaohe are increasing during September, increasing by 378°F, from 2,702°F to 3,080°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 Erdaohe is decreasing during September, falling by 1.0 kWh, from 5.1 kWh to 4.1 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Erdaohe are 33.251 deg latitude, 106.830 deg longitude, and 3,642 ft elevation. The topography within 2 miles of Erdaohe contains large variations in elevation, with a maximum elevation change of 2,881 feet and an average elevation above sea level of 3,805 feet. Within 10 miles contains large variations in elevation (6,463 feet). Within 50 miles also contains extreme variations in elevation (7,221 feet). The area within 2 miles of Erdaohe is covered by grassland (46%), cropland (29%), trees (14%), and shrubs (11%), within 10 miles by trees (33%) and grassland (29%), and within 50 miles by grassland (38%) and trees (37%). Data SourcesThis report illustrates the typical weather in Erdaohe, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Erdaohe 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 Erdaohe, 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 © 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. 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