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Average Weather in July in Summerlin South Nevada, United States

Daily high temperatures are around 100°F, rarely falling below 93°F or exceeding 107°F. The highest daily average high temperature is 101°F on July 15.

Daily low temperatures increase by 2°F, from 74°F to 76°F, rarely falling below 68°F or exceeding 83°F. The highest daily average low temperature is 77°F on July 23.

For reference, on July 15, the hottest day of the year, temperatures in Summerlin South typically range from 76°F to 101°F, while on December 26, the coldest day of the year, they range from 35°F to 53°F.

Average High and Low Temperature in July

Average High and Low Temperature in July in Summerlin South18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313155°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°F110°F110°FJunAugJul 15101°FJul 15101°F76°F76°FJul 1100°FJul 1100°F74°F74°FJul 31100°FJul 31100°F76°F76°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in July in Summerlin South18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJunAugNowNowcomfortablewarmwarmhotswelteringwarmcomfortablehot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Laghouat, Algeria (6,183 miles away) is the far-away foreign place with temperatures most similar to Summerlin South (view comparison).

Clouds

The month of July in Summerlin South experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 13% to 18%.

The clearest day of the month is July 1, with clear, mostly clear, or partly cloudy conditions 87% of the time.

For reference, on February 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on June 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.

Cloud Cover Categories in July

Cloud Cover Categories in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugJul 187%Jul 187%Jul 3182%Jul 3182%Jul 1185%Jul 1185%Jul 2182%Jul 2182%NowNowclearmostly clearovercastpartly cloudymostly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Summerlin South, the chance of a wet day over the course of July is increasing, starting the month at 3% and ending it at 9%.

For reference, the year's highest daily chance of a wet day is 13% on February 21, and its lowest chance is 1% on June 17.

Probability of Precipitation in July

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 in Summerlin South is gradually increasing, starting the month at 0.2 inches, when it rarely exceeds 0.5 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.1 inches.

Average Monthly Rainfall in July

Average Monthly Rainfall in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inJunAugJul 10.2 inJul 10.2 inJul 310.5 inJul 310.5 inJul 110.3 inJul 110.3 inJul 210.4 inJul 210.4 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of July in Summerlin South, 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, 14 seconds.

The shortest day of the month is July 31, with 13 hours, 59 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 number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Summerlin South is 5:28 AM on July 1 and the latest sunrise is 20 minutes later at 5:47 AM on July 31.

The latest sunset is 8:02 PM on July 1 and the earliest sunset is 15 minutes earlier at 7:46 PM on July 31.

Daylight saving time is observed in Summerlin South during 2021, but it neither starts nor ends during July, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:24 AM and sets 14 hours, 37 minutes later, at 8:01 PM, while on December 21, the shortest day of the year, it rises at 6:48 AM and sets 9 hours, 42 minutes later, at 4:30 PM.

Sunrise & Sunset with Twilight in July

The solar day over the course of July. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for July 2021. 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.

Moon Rise, Set & Phases in July

Moon in Summerlin South18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJunAugJun 103:53 AMJun 103:53 AMJun 2411:40 AMJun 2411:40 AMJul 96:17 PMJul 96:17 PMJul 237:38 PMJul 237:38 PMAug 86:51 AMAug 86:51 AMAug 225:03 AMAug 225:03 AM5:27 AM5:27 AM8:33 PM8:33 PM7:19 PM7:19 PM5:07 AM5:07 AM4:58 AM4:58 AM8:13 PM8:13 PM8:07 PM8:07 PM6:06 AM6:06 AM5:47 AM5:47 AM8:16 PM8:16 PM7:26 PM7:26 PM6:05 AM6:05 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

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 in Summerlin South is essentially constant during July, remaining around 1% throughout.

For reference, on August 13, the muggiest day of the year, there are muggy conditions 2% of the time, while on October 13, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in July

Humidity Comfort Levels in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JunAugJul 11%Jul 11%Jul 311%Jul 311%Jul 111%Jul 111%Jul 212%Jul 212%NowNowhumidhumidcomfortablecomfortabledrydrymuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 in Summerlin South is decreasing during July, decreasing from 8.6 miles per hour to 7.5 miles per hour over the course of the month.

For reference, on April 26, the windiest day of the year, the daily average wind speed is 9.3 miles per hour, while on October 12, the calmest day of the year, the daily average wind speed is 7.0 miles per hour.

Average Wind Speed in July

Average Wind Speed in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphJunAugJul 18.6 mphJul 18.6 mphJul 317.5 mphJul 317.5 mphJul 118.1 mphJul 118.1 mphJul 217.7 mphJul 217.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Summerlin South throughout July is predominantly from the south, with a peak proportion of 56% on July 30.

Wind Direction in July

Wind Direction in July in Summerlin SouthWS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JunAugNowNowwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Growing Season

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 in Summerlin South typically lasts for 9.6 months (291 days), from around February 11 to around November 29, rarely starting before January 14 or after March 13, and rarely ending before November 11 or after December 19.

The month of July in Summerlin South is reliably fully within the growing season.

Time Spent in Various Temperature Bands and the Growing Season in July

Time Spent in Various Temperature Bands and the Growing Season in July in Summerlin Southgrowing seasongrowing seasongrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAug100%Jul 16100%Jul 16NowNowcomfortablewarmhotswelteringcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is 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 in Summerlin South are very rapidly increasing during July, increasing by 992°F, from 2,390°F to 3,382°F, over the course of the month.

Growing Degree Days in July

Growing Degree Days in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312,000°F2,000°F2,200°F2,200°F2,400°F2,400°F2,600°F2,600°F2,800°F2,800°F3,000°F3,000°F3,200°F3,200°F3,400°F3,400°F3,600°F3,600°FJunAugJul 12,390°FJul 12,390°FJul 313,382°FJul 313,382°FJul 112,718°FJul 112,718°FJul 213,049°FJul 213,049°FNowNow
The average growing degree days accumulated over the course of July, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 in Summerlin South is gradually decreasing during July, falling by 0.9 kWh, from 8.5 kWh to 7.6 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in July

Average Daily Incident Shortwave Solar Energy in July in Summerlin South1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJunAugJul 18.5 kWhJul 18.5 kWhJul 317.6 kWhJul 317.6 kWhJul 118.2 kWhJul 118.2 kWhJul 217.9 kWhJul 217.9 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Summerlin South are 36.117 deg latitude, -115.330 deg longitude, and 2,854 ft elevation.

The topography within 2 miles of Summerlin South contains very significant variations in elevation, with a maximum elevation change of 1,050 feet and an average elevation above sea level of 2,901 feet. Within 10 miles contains very significant variations in elevation (6,056 feet). Within 50 miles also contains extreme variations in elevation (11,201 feet).

The area within 2 miles of Summerlin South is covered by shrubs (77%) and artificial surfaces (19%), within 10 miles by shrubs (81%) and artificial surfaces (16%), and within 50 miles by shrubs (92%).

Data Sources

This report illustrates the typical weather in Summerlin South, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Summerlin South.

For each station, the records are corrected for the elevation difference between that station and Summerlin South 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 Summerlin South is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Summerlin South and a given station.

The stations contributing to this reconstruction are: McCarran International Airport (42%, 16 kilometers, east); North Las Vegas Air Terminal (43%, 16 kilometers, northeast); Creech Air Force Base (12%, 61 kilometers, northwest); and Bicycle Lake Army Airfield (2.5%, 150 kilometers, southwest).

Other Data

All 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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The 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.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.