Hello. Because our weather varies from one community to the next, the averages below are from Rapid City unless otherwise noted. The number of hours during which the Sun is visible (black line). Feb. 34°F 1°C. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. Average daily temperatures in August. The solar day over the course of August. A scenic panoramic view of Rapid City in South Dakota, on a sunny and calm day, with intense tree cover spread out into the horizon, bright sky Weather in March March , the first month of the spring, in Rapid City , is a chilly month, with average temperature fluctuating between 47.8°F (8.8°C) and 22.8°F ( ⦠Free Long Range Weather Forecast for Rapid City, South Dakota. 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. Weather South Dakota september On average, it is maximum 25° in september in South Dakota and at least around 13° degrees. Chevron right From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The earliest sunrise of the month in Rapid City is 5:41 AM on August 1 and the latest sunrise is 34 minutes later at 6:15 AM on August 31. The topography within 2 miles of Rapid City contains significant variations in elevation, with a maximum elevation change of 689 feet and an average elevation above sea level of 3,334 feet. 'real feel', 'feels like'), that combines relative humidity and air temperature, is evaluated at 89.2°F (31.8°C) . We will review the data in question. High 49F. The latest sunset is 8:16 PM on August 1 and the earliest sunset is 47 minutes earlier at 7:29 PM on August 31. 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. In Rapid City, there are 3 comfortable months with high temperatures in the range of 70-85°. Weather in Rapid City, South Dakota. The average hourly wind speed in Rapid City is essentially constant during August, remaining within 0.2 miles per hour of 7.8 miles per hour throughout. The wettest month (with the highest rainfall) is May (81.8mm). For reference, the year's highest daily chance of a wet day is 37% on June 5, and its lowest chance is 3% on January 16. 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. Over the course of August in Rapid City, the length of the day is rapidly decreasing. South Dakota Interactive Map of Historical Record High and Low Temperatures The stations contributing to this reconstruction are: Ellsworth Air Force Base (51%, 13 kilometers, northeast); Rapid City Regional Airport (42%, 15 kilometers, east); Custer County Airfield (3.0%, 49 kilometers, southwest); and Black Hills Airport (4.5%, 63 kilometers, northwest). The area within 2 miles of Rapid City is covered by artificial surfaces (59%) and grassland (35%), within 10 miles by grassland (67%) and trees (18%), and within 50 miles by grassland (61%) and trees (23%). The hours when this month's highest and lowest humidity readings usually occur are given in local standard time. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. Monthly averages Rapid City Longitude: -103.057, Latitude: 44.0453 Average weather Rapid City, SD - 57703. The month with the highest relative humidity is February (65.1%). 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. Coldest months (with the lowest average low temperature) are January and December (-10.6°C). Month. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. Rapid City. The percentage of time spent at various humidity comfort levels, categorized by dew point. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Kuluncak, Turkey (6,215 miles away) is the far-away foreign place with temperatures most similar to Rapid City (view comparison). Rapid City, SD - Weather forecast from Theweather.com. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Get the monthly weather forecast for Rapid City, SD, including daily high/low, historical averages, to help you plan ahead. Thank you for reporting this station. Rapid City (Lakota: Mni LúzahaÅ OtÈúÅwahe; "Swift Water City") is the second most populous city in South Dakota and the county seat of Pennington County. Monthly: 1981-2010 normals The percentage of time spent in various temperature bands. The clearest day of the month is August 20, with clear, mostly clear, or partly cloudy conditions 75% of the time. Time zones for airports and weather stations are provided by AskGeo.com . 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. The average hourly temperature, color coded into bands. 29. Place. At one place, Rapid City, humidity data are for 8 am and 5 pm. Jan. 32°F 0°C. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. Daily high temperatures decrease by 4°F, from 87°F to 82°F, rarely falling below 70°F or exceeding 96°F. 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. For reference, on July 26, the hottest day of the year, temperatures in Rapid City typically range from 62°F to 87°F, while on January 1, the coldest day of the year, they range from 17°F to 35°F. The average sliding 31-day rainfall during August in Rapid City is gradually decreasing, starting the month at 1.5 inches, when it rarely exceeds 2.5 inches or falls below 0.7 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.3 inches. The average growing degree days accumulated over the course of August, with 25th to 75th and 10th to 90th percentile bands. In Rapid City, the summers are warm and mostly clear and the winters are freezing, dry, windy, and partly cloudy. 0 in 1 cm. Rapid City Weather Forecasts. MERRA-2 Modern-Era Retrospective Analysis. July is the hottest month for South Dakota with an average high temperature of 85.2°, which ranks it as about average compared to other states. South Dakota sd, Weather 30 Day. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. August is in the summer in Rapid City and is typically the 2nd warmest month of the year. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Months with the highest UV index are June and July (UV index 9). The gear we required for the rest of South Dakota was slightly different to the stuff we used in Badlands National Park so here is our rest of South Dakota packing list. The chance that a given day will be muggy in Rapid City is essentially constant during August, remaining within 1% of 1% throughout. Low. Rapid City, SD Weather Calendar star_ratehome. High. The month with the longest days is June (Average daylight: 15.4h). The estimated value at Rapid City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rapid City and a given station. From the start to the end of the month, the length of the day decreases by 1 hour, 21 minutes, implying an average daily decrease of 2 minutes, 41 seconds, and weekly decrease of 18 minutes, 50 seconds. Low °F. Does it rain in South Dakota in August? Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. Based on weather reports collected during 1985â2015. 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