Average Weather in July in Grand Canyon Arizona, United States
Daily high temperatures decrease by 2°F, from 84°F to 82°F, rarely falling below 76°F or exceeding 91°F. The highest daily average high temperature is 84°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 28.
For reference, on July 3, the hottest day of the year, temperatures in Grand Canyon typically range from 47°F to 84°F, while on January 4, the coldest day of the year, they range from 16°F to 42°F.
Average High and Low Temperature in July
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.
Average Hourly Temperature in July
The month of July in Grand Canyon 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%.
Cloud Cover Categories in July
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Grand Canyon, 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 27% on August 3, and its lowest chance is 4% on June 14.
Probability of Precipitation in July
The average sliding 31-day rainfall during July in Grand Canyon 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 1.3 inches, when it rarely exceeds 2.2 inches or falls below 0.4 inches.
Average Monthly Rainfall in July
Over the course of July in Grand Canyon, 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, 16 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, 34 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Grand Canyon 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 16 minutes earlier at 7:33 PM on July 31.
Daylight saving time is not observed in Grand Canyon during 2020.
For reference, on June 20, the longest day of the year, the Sun rises at 5:11 AM and sets 14 hours, 37 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, 42 minutes later, at 5:18 PM.
Sunrise & Sunset with Twilight in July
The chance that a given day will be muggy in Grand Canyon is essentially constant during July, remaining around 0% throughout.
Humidity Comfort Levels in July
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Grand Canyon is decreasing during July, decreasing from 7.9 miles per hour to 6.2 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 9.5 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.
Average Wind Speed in July
The hourly average wind direction in Grand Canyon throughout July is predominantly from the west, with a peak proportion of 58% on July 13.
Wind Direction in July
The growing season in Grand Canyon typically lasts for 3.5 months (107 days), from around June 10 to around September 25, rarely starting before May 23 or after June 27, and rarely ending before September 7 or after October 14.
The month of July in Grand Canyon is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 95% to 100% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in July
The average accumulated growing degree days in Grand Canyon are rapidly increasing during July, increasing by 531°F, from 867°F to 1,399°F, over the course of the month.
Growing Degree Days in July
The average daily incident shortwave solar energy in Grand Canyon is decreasing during July, falling by 1.3 kWh, from 8.2 kWh to 7.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Grand Canyon are 36.054 deg latitude, -112.139 deg longitude, and 6,726 ft elevation.
The topography within 2 miles of Grand Canyon contains extreme variations in elevation, with a maximum elevation change of 3,451 feet and an average elevation above sea level of 6,465 feet. Within 10 miles also contains extreme variations in elevation (5,846 feet). Within 50 miles also contains extreme variations in elevation (8,635 feet).
The area within 2 miles of Grand Canyon is covered by trees (82%) and shrubs (18%), within 10 miles by shrubs (52%) and trees (46%), and within 50 miles by shrubs (75%) and trees (19%).
This report illustrates the typical weather in Grand Canyon year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Grand Canyon.
For each station, the records are corrected for the elevation difference between that station and Grand Canyon according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Grand Canyon is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grand Canyon and a given station.
The stations contributing to this reconstruction are: Grand Canyon National Park Airport (95%, 12 kilometers, south); Page Municipal Airport (2.7%, 115 kilometers, northeast); and Colorado City Municipal Airport (2.6%, 128 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .