Summer Weather at Kansas City International Airport Missouri, United StatesDaily high temperatures increase by 5°F, from 80°F to 84°F, rarely falling below 70°F or exceeding 98°F. The highest daily average high temperature is 89°F on July 20. Daily low temperatures increase by 4°F, from 61°F to 65°F, rarely falling below 53°F or exceeding 77°F. The highest daily average low temperature is 70°F on July 20. For reference, on July 20, the hottest day of the year, temperatures at Kansas City International Airport typically range from 70°F to 89°F, while on January 22, the coldest day of the year, they range from 22°F to 39°F. The figure below shows you a compact characterization of the hourly average summer temperatures. 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. Zhu Cheng City, China (6,806 miles away) and Daejeon, South Korea (6,571 miles) are the far-away foreign places with temperatures most similar to Kansas City International Airport (view comparison). CloudsThe summer at Kansas City International Airport experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 42% to 29%. The lowest chance of overcast or mostly cloudy conditions is 28% on August 26. The clearest day of the summer is August 26, with clear, mostly clear, or partly cloudy conditions 72% of the time. For reference, on February 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on August 26, 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. At Kansas City International Airport, the chance of a wet day over the course of the summer is very rapidly decreasing, starting the season at 43% and ending it at 31%. For reference, the year's highest daily chance of a wet day is 45% on June 7, and its lowest chance is 9% on January 12. RainfallTo show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day rainfall during the summer at Kansas City International Airport is rapidly decreasing, starting the season at 4.9 inches, when it rarely exceeds 8.1 inches or falls below 2.1 inches, and ending the season at 3.9 inches, when it rarely exceeds 7.1 inches or falls below 1.4 inches. The highest average 31-day accumulation is 4.9 inches on June 1. The lowest average 31-day accumulation is 3.4 inches on July 31. SunOver the course of the summer at Kansas City International Airport, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 43 minutes, implying an average daily decrease of 1 minute, 8 seconds, and weekly decrease of 7 minutes, 55 seconds. The shortest day of the summer is August 31, with 13 hours, 3 minutes of daylight and the longest day is June 20, with 14 hours, 56 minutes of daylight. The earliest sunrise of the summer at Kansas City International Airport is 5:51 AM on June 14 and the latest sunrise is 55 minutes later at 6:47 AM on August 31. The latest sunset is 8:49 PM on June 27 and the earliest sunset is 59 minutes earlier at 7:50 PM on August 31. Daylight saving time is observed at Kansas City International Airport during 2024, but it neither starts nor ends during the summer, so the entire season is in daylight saving time. For reference, on June 20, the longest day of the year, the Sun rises at 5:52 AM and sets 14 hours, 56 minutes later, at 8:48 PM, while on December 21, the shortest day of the year, it rises at 7:35 AM and sets 9 hours, 24 minutes later, at 4:59 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 the summer of 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 at Kansas City International Airport is rapidly increasing during the summer, rising from 24% to 44% over the course of the season. The highest chance of a muggy day during the summer is 67% on July 22. For reference, on July 21, the muggiest day of the year, there are muggy conditions 67% of the time, while on November 18, 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 at Kansas City International Airport is decreasing during the summer, decreasing from 9.8 miles per hour to 8.8 miles per hour over the course of the season. For reference, on March 31, the windiest day of the year, the daily average wind speed is 12.6 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 8.0 miles per hour. The lowest daily average wind speed during the summer is 8.0 miles per hour on August 6. The hourly average wind direction at Kansas City International Airport throughout the summer is predominantly from the south, with a peak proportion of 54% on July 4. 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 at Kansas City International Airport typically lasts for 6.7 months (204 days), from around April 5 to around October 27, rarely starting before March 18 or after April 22, and rarely ending before October 9 or after November 14. The summer at Kansas City International Airport 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 at Kansas City International Airport are very rapidly increasing during the summer, increasing by 2,336°F, from 860°F to 3,195°F, over the course of the season. 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 at Kansas City International Airport is gradually decreasing during the summer, falling by 0.8 kWh, from 6.6 kWh to 5.8 kWh, over the course of the season. The highest average daily incident shortwave solar energy during the summer is 7.0 kWh on July 8. TopographyFor the purposes of this report, the geographical coordinates of Kansas City International Airport are 39.296 deg latitude, -94.718 deg longitude, and 1,001 ft elevation. The topography within 2 miles of Kansas City International Airport contains only modest variations in elevation, with a maximum elevation change of 167 feet and an average elevation above sea level of 979 feet. Within 10 miles also contains only modest variations in elevation (348 feet). Within 50 miles contains only modest variations in elevation (531 feet). The area within 2 miles of Kansas City International Airport is covered by artificial surfaces (45%), cropland (43%), and bare soil (10%), within 10 miles by cropland (62%) and trees (20%), and within 50 miles by cropland (71%) and trees (15%). Data SourcesThis report illustrates the typical weather at Kansas City International Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointKansas City International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. The stations on which we may fall back include but are not limited to Charles B. Wheeler Downtown Airport, Johnson County Executive Airport, New Century AirCenter, Lee's Summit Municipal Airport, Rosecrans Memorial Airport, Lawrence Municipal Airport, Philip Billard Municipal Airport, and Forbes Field Airport. 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. 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