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Average Weather in July at Deadhorse Airport Alaska, United States

At Deadhorse Airport, the month of July is characterized by gradually rising daily high temperatures, with daily highs increasing by 2°F, from 53°F to 55°F over the course of the month, and rarely exceeding 69°F or dropping below 42°F. The highest daily average high temperature is 56°F on July 28.

Daily low temperatures increase by 2°F, from 39°F to 41°F, rarely falling below 32°F or exceeding 50°F. The highest daily average low temperature is 41°F on July 28.

For reference, on July 28, the hottest day of the year, temperatures at Deadhorse Airport typically range from 41°F to 56°F, while on February 9, the coldest day of the year, they range from -22°F to -9°F.

Average High and Low Temperature in July

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 at Deadhorse Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMJunAugcoldchillyfreezing
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.


The month of July at Deadhorse Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 65% to 70%.

The clearest day of the month is July 1, with clear, mostly clear, or partly cloudy conditions 35% of the time.

For reference, on January 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 88%, while on June 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 36%.

Cloud Cover Categories in July

Cloud Cover Categories in July at Deadhorse Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugJul 135%Jul 135%Jul 3130%Jul 3130%Jul 1134%Jul 1134%Jul 2133%Jul 2133%clearpartly cloudymostly cloudyovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Deadhorse Airport, the chance of a wet day over the course of July is very rapidly increasing, starting the month at 14% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 23% on August 15, and its lowest chance is 2% on April 1.

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).


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 Deadhorse Airport is gradually increasing, starting the month at 0.8 inches, when it rarely exceeds 1.5 inches or falls below 0.2 inches, and ending the month at 1.2 inches, when it rarely exceeds 2.1 inches or falls below 0.4 inches.

Average Monthly Rainfall in July

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.


Due to its extreme latitude, Deadhorse Airport experiences polar day (also known as the midnight Sun) during the summer and polar night during the winter. These are periods of time in which the sun is continuously above or below the horizon for more than one day. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.

In the summer at Deadhorse Airport during 2017, the Sun is continuously above the horizon for 2.4 months, rising at 1:55 AM on May 15, and not setting again until 1:40 AM on July 28. As such, July begins the month in polar day, which ends before the month is out.

The shortest day of the month is July 31, with 21 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 at Deadhorse Airport is 2:21 AM on July 28 and the latest sunrise is 47 minutes later at 3:08 AM on July 31.

The latest sunset is 1:40 AM on July 27 and the earliest sunset is 58 minutes earlier at 12:42 AM on July 31.

Daylight saving time is observed at Deadhorse Airport during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.

Sunrise & Sunset with Twilight in July

Sunrise & Sunset with Twilight in July at Deadhorse Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJunAug1:40 AMJul 271:40 AMJul 272:21 AM2:21 AM
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.


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 Deadhorse Airport is essentially constant during July, remaining around 0% throughout.

Humidity Comfort Levels in July

The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


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 Deadhorse Airport is essentially constant during July, remaining within 0.1 miles per hour of 5.0 miles per hour throughout.

For reference, on January 12, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on July 29, the calmest day of the year, the daily average wind speed is 5.0 miles per hour.

The lowest daily average wind speed during July is 5.0 miles per hour on July 29.

Average Wind Speed in July

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 at Deadhorse Airport throughout July is predominantly from the east, with a peak proportion of 55% on July 1.

Wind Direction in July

Wind Direction in July at Deadhorse Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugeastwestnorthsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Deadhorse 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 Deadhorse Airport is gradually increasing during July, rising by 3°F, from 32°F to 35°F, over the course of the month.

Average Water Temperature in July

The daily average water temperature (purple line), 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 at Deadhorse Airport is rapidly decreasing during July, falling by 1.6 kWh, from 5.7 kWh to 4.1 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in July

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Deadhorse Airport are 70.195 deg latitude, -148.465 deg longitude, and 49 ft elevation.

The topography within 2 miles of Deadhorse Airport is essentially flat, with a maximum elevation change of 46 feet and an average elevation above sea level of 51 feet. Within 10 miles is essentially flat (141 feet). Within 50 miles contains only modest variations in elevation (1,030 feet).

The area within 2 miles of Deadhorse Airport is covered by sparse vegetation (36%), grassland (31%), water (14%), and herbaceous vegetation (14%), within 10 miles by grassland (41%) and sparse vegetation (32%), and within 50 miles by water (39%) and grassland (36%).

Data Sources

This report illustrates the typical weather at Deadhorse Airport 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

Deadhorse 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 are Nuiqsut Airport and Barter Island LRRS Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.