June Weather at Oak Ridge United StatesDaily high temperatures increase by 5°F, from 82°F to 87°F, rarely falling below 74°F or exceeding 93°F. Daily low temperatures increase by 6°F, from 62°F to 68°F, rarely falling below 53°F or exceeding 72°F. For reference, on July 21, the hottest day of the year, temperatures at Oak Ridge typically range from 69°F to 88°F, while on January 24, the coldest day of the year, they range from 31°F to 48°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on June. 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. Polýkastro, Greece (5,389 miles away) is the far-away foreign place with temperatures most similar to Oak Ridge (view comparison). CloudsThe month of June at Oak Ridge 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 clearest day of the month is June 27, with clear, mostly clear, or partly cloudy conditions 56% of the time. For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on September 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Oak Ridge, the chance of a wet day over the course of June is gradually increasing, starting the month at 41% and ending it at 44%. For reference, the year's highest daily chance of a wet day is 45% on July 8, and its lowest chance is 21% on October 15. 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 June at Oak Ridge is essentially constant, remaining about 3.6 inches throughout, and rarely exceeding 6.5 inches or falling below 1.4 inches. SunOver the course of June at Oak Ridge, the length of the day is essentially constant. The shortest day of the month is June 1, with 14 hours, 27 minutes of daylight and the longest day is June 20, with 14 hours, 37 minutes of daylight. The earliest sunrise of the month at Oak Ridge is 6:19 AM on June 12 and the latest sunrise is 4 minutes later at 6:23 AM on June 30. The earliest sunset is 8:48 PM on June 1 and the latest sunset is 9 minutes later at 8:57 PM on June 28. Daylight saving time is observed at Oak Ridge during 2024, but it neither starts nor ends during June, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 6:20 AM and sets 14 hours, 37 minutes later, at 8:57 PM, while on December 21, the shortest day of the year, it rises at 7:44 AM and sets 9 hours, 43 minutes later, at 5:26 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 June 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 Oak Ridge is very rapidly increasing during June, rising from 37% to 68% over the course of the month. For reference, on July 24, the muggiest day of the year, there are muggy conditions 82% of the time, while on December 17, 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 Oak Ridge is essentially constant during June, remaining within 0.1 miles per hour of 3.6 miles per hour throughout. For reference, on February 25, the windiest day of the year, the daily average wind speed is 5.5 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 3.2 miles per hour. The wind direction at Oak Ridge during June is predominantly out of the south from June 1 to June 22 and the west from June 22 to June 30. 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 Oak Ridge typically lasts for 7.0 months (213 days), from around April 2 to around November 2, rarely starting before March 9 or after April 22, and rarely ending before October 13 or after November 20. The month of June at Oak Ridge 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 Oak Ridge are rapidly increasing during June, increasing by 697°F, from 1,119°F to 1,815°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 at Oak Ridge is essentially constant during June, remaining within 0.1 kWh of 6.7 kWh throughout. The highest average daily incident shortwave solar energy during June is 6.7 kWh on June 22. TopographyFor the purposes of this report, the geographical coordinates of Oak Ridge are 36.023 deg latitude, -84.233 deg longitude, and 896 ft elevation. The topography within 2 miles of Oak Ridge contains only modest variations in elevation, with a maximum elevation change of 397 feet and an average elevation above sea level of 934 feet. Within 10 miles contains only modest variations in elevation (2,605 feet). Within 50 miles contains large variations in elevation (5,157 feet). The area within 2 miles of Oak Ridge is covered by artificial surfaces (61%) and trees (39%), within 10 miles by trees (68%) and artificial surfaces (17%), and within 50 miles by trees (69%) and cropland (23%). Data SourcesThis report illustrates the typical weather at Oak Ridge, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointOak Ridge 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 McGhee Tyson Airport, Middlesboro-Bell County Airport, Crossville Memorial Airport, Western Carolina Regional Airport, Wayne County Airport, London-Corbin Airport, Lake Cumberland Regional Airport, and Macon County 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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