July Weather at Paris–Le Bourget Airport FranceDaily high temperatures increase by 3°F, from 74°F to 78°F, rarely falling below 65°F or exceeding 88°F. Daily low temperatures increase by 2°F, from 56°F to 58°F, rarely falling below 50°F or exceeding 65°F. The highest daily average low temperature is 58°F on July 26. For reference, on August 3, the hottest day of the year, temperatures at Paris–Le Bourget Airport typically range from 58°F to 78°F, while on February 8, the coldest day of the year, they range from 35°F to 46°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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. East Renton Highlands, United States (4,999 miles away) is the far-away foreign place with temperatures most similar to Paris–Le Bourget Airport (view comparison). CloudsThe month of July at Paris–Le Bourget Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 40% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 38% on July 21. The clearest day of the month is July 21, with clear, mostly clear, or partly cloudy conditions 62% of the time. For reference, on December 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 62%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Paris–Le Bourget Airport, the chance of a wet day over the course of July is essentially constant, remaining around 22% throughout. For reference, the year's highest daily chance of a wet day is 31% on December 21, and its lowest chance is 20% on August 22. 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 July at Paris–Le Bourget Airport is essentially constant, remaining about 1.6 inches throughout, and rarely exceeding 3.2 inches or falling below 0.5 inches. SunOver the course of July at Paris–Le Bourget Airport, 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 1 minute, 59 seconds, and weekly decrease of 13 minutes, 52 seconds. The shortest day of the month is July 31, with 15 hours, 8 minutes of daylight and the longest day is July 1, with 16 hours, 7 minutes of daylight. The earliest sunrise of the month at Paris–Le Bourget Airport is 5:50 AM on July 1 and the latest sunrise is 32 minutes later at 6:22 AM on July 31. The latest sunset is 9:57 PM on July 1 and the earliest sunset is 28 minutes earlier at 9:29 PM on July 31. Daylight saving time is observed at Paris–Le Bourget Airport during 2024, but it neither starts nor ends during July, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 5:45 AM and sets 16 hours, 12 minutes later, at 9:57 PM, while on December 21, the shortest day of the year, it rises at 8:41 AM and sets 8 hours, 14 minutes later, at 4:55 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 July 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 Paris–Le Bourget Airport is essentially constant during July, remaining around 4% throughout. The highest chance of a muggy day during July is 4% on July 12. For reference, on July 12, the muggiest day of the year, there are muggy conditions 4% 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 at Paris–Le Bourget Airport is gradually decreasing during July, decreasing from 8.7 miles per hour to 8.0 miles per hour over the course of the month. For reference, on January 17, the windiest day of the year, the daily average wind speed is 11.7 miles per hour, while on August 7, the calmest day of the year, the daily average wind speed is 7.9 miles per hour. The hourly average wind direction at Paris–Le Bourget Airport throughout July is predominantly from the west, with a peak proportion of 41% on July 5. 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 Paris–Le Bourget Airport typically lasts for 7.7 months (234 days), from around March 24 to around November 14, rarely starting before February 19 or after April 21, and rarely ending before October 22 or after December 14. The month of July at Paris–Le Bourget 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 Paris–Le Bourget Airport are rapidly increasing during July, increasing by 518°F, from 879°F to 1,397°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 Paris–Le Bourget Airport is essentially constant during July, remaining within 0.2 kWh of 6.4 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Paris–Le Bourget Airport are 48.969 deg latitude, 2.441 deg longitude, and 187 ft elevation. The topography within 2 miles of Paris–Le Bourget Airport contains only modest variations in elevation, with a maximum elevation change of 223 feet and an average elevation above sea level of 176 feet. Within 10 miles contains only modest variations in elevation (679 feet). Within 50 miles contains significant variations in elevation (892 feet). The area within 2 miles of Paris–Le Bourget Airport is covered by artificial surfaces (66%) and cropland (25%), within 10 miles by artificial surfaces (64%) and cropland (29%), and within 50 miles by cropland (56%) and trees (24%). Data SourcesThis report illustrates the typical weather at Paris–Le Bourget 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 PointParis–Le Bourget 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 Paris Charles de Gaulle Airport, Paris Orly Airport, Creil, Vélizy – Villacoublay Air Base, Toussus-le-Noble Airport, Pontoise – Cormeilles Aerodrom, Melun-Villaroche, and Beauvais–Tillé 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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