July Weather at St. George Airport United States

Daily high temperatures increase by 3°F, from 49°F to 52°F, rarely falling below 45°F or exceeding 56°F.

Daily low temperatures increase by 4°F, from 42°F to 46°F, rarely falling below 39°F or exceeding 49°F.

For reference, on August 12, the hottest day of the year, temperatures at St. George Airport typically range from 46°F to 52°F, while on February 12, the coldest day of the year, they range from 24°F to 31°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.

Ávanuorri, Norway (3,598 miles away) is the far-away foreign place with temperatures most similar to St. George Airport (view comparison).

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The month of July at St. George Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 88% throughout the month. The highest chance of overcast or mostly cloudy conditions is 89% on July 16.

The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 13% of the time.

For reference, on July 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on October 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 36%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At St. George Airport, the chance of a wet day over the course of July is rapidly increasing, starting the month at 25% and ending it at 31%.

For reference, the year's highest daily chance of a wet day is 37% on September 1, and its lowest chance is 17% on May 7.

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 St. George Airport is increasing, starting the month at 1.8 inches, when it rarely exceeds 3.2 inches or falls below 0.7 inches, and ending the month at 2.6 inches, when it rarely exceeds 3.9 inches or falls below 1.4 inches.

Over the course of July at St. George Airport, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 28 minutes, implying an average daily decrease of 2 minutes, 57 seconds, and weekly decrease of 20 minutes, 36 seconds.

The shortest day of the month is July 31, with 16 hours, 10 minutes of daylight and the longest day is July 1, with 17 hours, 38 minutes of daylight.

The earliest sunrise of the month at St. George Airport is 5:33 AM on July 1 and the latest sunrise is 46 minutes later at 6:19 AM on July 31.

The latest sunset is 11:11 PM on July 1 and the earliest sunset is 42 minutes earlier at 10:29 PM on July 31.

Daylight saving time is observed at St. George 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 5:27 AM and sets 17 hours, 46 minutes later, at 11:13 PM, while on December 21, the shortest day of the year, it rises at 9:52 AM and sets 6 hours, 49 minutes later, at 4:41 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 St. George 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 St. George Airport is gradually increasing during July, increasing from 12.3 miles per hour to 13.1 miles per hour over the course of the month.

For reference, on January 21, the windiest day of the year, the daily average wind speed is 22.0 miles per hour, while on July 14, the calmest day of the year, the daily average wind speed is 12.2 miles per hour.

The lowest daily average wind speed during July is 12.2 miles per hour on July 14.

The hourly average wind direction at St. George Airport throughout July is predominantly from the west, with a peak proportion of 34% on July 27.

St. George Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature at St. George Airport is gradually increasing during July, rising by 4°F, from 44°F to 47°F, over the course of the month.

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 St. George Airport typically lasts for 4.0 months (121 days), from around May 31 to around September 30, rarely starting before May 12 or after June 24, and rarely ending before September 7 or after October 26.

The month of July at St. George Airport is very likely fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 27.

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 St. George Airport are essentially constant during July, remaining within 5°F of 7°F throughout.

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 St. George Airport is gradually decreasing during July, falling by 0.6 kWh, from 4.1 kWh to 3.5 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of St. George Airport are 56.578 deg latitude, -169.663 deg longitude, and 112 ft elevation.

The topography within 2 miles of St. George Airport contains very significant variations in elevation, with a maximum elevation change of 961 feet and an average elevation above sea level of 210 feet. Within 10 miles also contains very significant variations in elevation (974 feet). Within 50 miles also contains very significant variations in elevation (991 feet).

The area within 2 miles of St. George Airport is covered by water (32%), grassland (25%), sparse vegetation (24%), and shrubs (19%), within 10 miles by water (91%), and within 50 miles by water (99%).