July Weather at Grand Canyon National Park Airport Arizona, United States

Daily high temperatures decrease by 2°F, from 85°F to 83°F, rarely falling below 76°F or exceeding 91°F. The highest daily average high temperature is 85°F on July 4.

Daily low temperatures increase by 6°F, from 46°F to 52°F, rarely falling below 39°F or exceeding 58°F. The highest daily average low temperature is 52°F on July 29.

For reference, on July 3, the hottest day of the year, temperatures at Grand Canyon National Park Airport typically range from 47°F to 85°F, while on January 4, the coldest day of the year, they range from 16°F to 43°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.

Hacıbektaş, Turkey (6,851 miles away) is the far-away foreign place with temperatures most similar to Grand Canyon National Park Airport (view comparison).

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The month of July at Grand Canyon National Park Airport experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 21% to 32%. The highest chance of overcast or mostly cloudy conditions is 32% on July 29.

The clearest day of the month is July 1, with clear, mostly clear, or partly cloudy conditions 79% of the time.

For reference, on February 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 41%, while on September 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 84%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Grand Canyon National Park Airport, the chance of a wet day over the course of July is very rapidly increasing, starting the month at 12% and ending it at 27%.

For reference, the year's highest daily chance of a wet day is 28% on August 3, and its lowest chance is 4% on June 14.

Rainfall

To 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 Grand Canyon National Park Airport is increasing, starting the month at 0.6 inches, when it rarely exceeds 1.2 inches or falls below 0.1 inches, and ending the month at 1.4 inches, when it rarely exceeds 2.2 inches or falls below 0.4 inches.

Over the course of July at Grand Canyon National Park Airport, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 35 minutes, implying an average daily decrease of 1 minute, 11 seconds, and weekly decrease of 8 minutes, 15 seconds.

The shortest day of the month is July 31, with 13 hours, 58 minutes of daylight and the longest day is July 1, with 14 hours, 33 minutes of daylight.

The earliest sunrise of the month at Grand Canyon National Park Airport is 5:15 AM on July 1 and the latest sunrise is 20 minutes later at 5:35 AM on July 31.

The latest sunset is 7:49 PM on July 1 and the earliest sunset is 15 minutes earlier at 7:33 PM on July 31.

Daylight saving time is not observed at Grand Canyon National Park Airport during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:12 AM and sets 14 hours, 36 minutes later, at 7:48 PM, while on December 21, the shortest day of the year, it rises at 7:35 AM and sets 9 hours, 43 minutes later, at 5:18 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.

The 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.

We 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 Grand Canyon National Park Airport is essentially constant during July, remaining around 0% throughout.

This 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 Grand Canyon National Park Airport is decreasing during July, decreasing from 8.0 miles per hour to 6.3 miles per hour over the course of the month.

For reference, on April 9, the windiest day of the year, the daily average wind speed is 9.7 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 6.1 miles per hour.

The hourly average wind direction at Grand Canyon National Park Airport throughout July is predominantly from the west, with a peak proportion of 57% on July 13.

Definitions 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 Grand Canyon National Park Airport typically lasts for 3.4 months (105 days), from around June 12 to around September 25, rarely starting before May 24 or after June 30, and rarely ending before September 7 or after October 14.

The month of July at Grand Canyon National Park Airport is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 92% to 100% over the course of the month.

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 Grand Canyon National Park Airport are rapidly increasing during July, increasing by 532°F, from 885°F to 1,417°F, over the course of the month.

This 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 Grand Canyon National Park Airport is decreasing during July, falling by 1.3 kWh, from 8.2 kWh to 6.9 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Grand Canyon National Park Airport are 35.952 deg latitude, -112.147 deg longitude, and 6,568 ft elevation.

The topography within 2 miles of Grand Canyon National Park Airport contains only modest variations in elevation, with a maximum elevation change of 305 feet and an average elevation above sea level of 6,617 feet. Within 10 miles contains only modest variations in elevation (4,892 feet). Within 50 miles also contains extreme variations in elevation (10,850 feet).

The area within 2 miles of Grand Canyon National Park Airport is covered by trees (78%) and shrubs (22%), within 10 miles by trees (63%) and shrubs (35%), and within 50 miles by shrubs (73%) and trees (22%).