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Summer Weather at Chevak Airport Alaska, United States

Daily high temperatures are around 56°F, rarely falling below 42°F or exceeding 69°F. The highest daily average high temperature is 59°F on July 19.

Daily low temperatures increase by 7°F, from 38°F to 46°F, rarely falling below 32°F or exceeding 54°F. The highest daily average low temperature is 49°F on July 27.

For reference, on July 18, the hottest day of the year, temperatures at Chevak Airport typically range from 49°F to 59°F, while on January 20, the coldest day of the year, they range from 3°F to 15°F.

Average High and Low Temperature in the Summer at Chevak Airport

Average High and Low Temperature in the Summer at Chevak AirportJunJulAug15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°FSpringFallJul 1859°FJul 1859°F49°F49°FJun 152°FJun 152°F38°F38°FAug 3155°FAug 3155°F46°F46°FJul 158°FJul 158°F46°F46°FAug 159°FAug 159°F49°F49°F
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 summer temperatures. 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 the Summer at Chevak Airport

Average Hourly Temperature in the Summer at Chevak AirportJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFallvery coldvery coldcoldcoolfreezing
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.

Kárášjohka, Norway (3,372 miles away) is the far-away foreign place with temperatures most similar to Chevak Airport (view comparison).

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The summer at Chevak Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 69% throughout the season. The highest chance of overcast or mostly cloudy conditions is 73% on July 6.

The clearest day of the summer is June 1, with clear, mostly clear, or partly cloudy conditions 34% of the time.

For reference, on January 7, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 40%.

Cloud Cover Categories in the Summer at Chevak Airport

Cloud Cover Categories in the Summer at Chevak AirportJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallOct 540%Oct 540%Jun 134%Jun 134%Aug 3134%Aug 3134%Jul 128%Jul 128%Aug 128%Aug 128%clearmostly clearpartly cloudymostly cloudyovercast
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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Chevak Airport, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 20% and ending it at 34%.

For reference, the year's highest daily chance of a wet day is 36% on August 14, and its lowest chance is 13% on March 25.

Probability of Precipitation in the Summer at Chevak Airport

Probability of Precipitation in the Summer at Chevak AirportJunJulAug0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%SpringFallAug 1436%Aug 1436%Jun 120%Jun 120%Aug 3134%Aug 3134%Jul 125%Jul 125%Aug 134%Aug 134%rainmixed
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer at Chevak Airport is rapidly increasing, starting the season at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.4 inches, and ending the season at 2.8 inches, when it rarely exceeds 4.8 inches or falls below 1.0 inches.

The highest average 31-day accumulation is 2.9 inches on August 21.

Average Monthly Rainfall in the Summer at Chevak Airport

Average Monthly Rainfall in the Summer at Chevak AirportJunJulAug0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inSpringFallAug 202.9 inAug 202.9 inJun 11.1 inJun 11.1 inJul 11.7 inJul 11.7 inAug 12.7 inAug 12.7 in
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 snowfall.

Over the course of the summer at Chevak Airport, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 4 hours, 37 minutes, implying an average daily decrease of 3 minutes, 3 seconds, and weekly decrease of 21 minutes, 20 seconds.

The shortest day of the summer is August 31, with 14 hours, 18 minutes of daylight and the longest day is June 20, with 19 hours, 31 minutes of daylight.

Hours of Daylight and Twilight in the Summer at Chevak Airport

Hours of Daylight and Twilight in the Summer at Chevak AirportJunJulAug0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFall19 hr, 31 minJun 2019 hr, 31 minJun 20nightnightdayday14 hr, 18 minAug 3114 hr, 18 minAug 3117 hr, 7 minAug 117 hr, 7 minAug 1
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 summer at Chevak Airport is 5:18 AM on June 18 and the latest sunrise is 2 hours, 34 minutes later at 7:52 AM on August 31.

The latest sunset is 12:50 AM on June 21 and the earliest sunset is 2 hours, 40 minutes earlier at 10:10 PM on August 31.

Daylight saving time is observed at Chevak Airport during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:18 AM and sets 19 hours, 31 minutes later, at 12:49 AM, while on December 21, the shortest day of the year, it rises at 11:21 AM and sets 5 hours, 20 minutes later, at 4:40 PM.

Sunrise & Sunset with Twilight in the Summer at Chevak Airport

Sunrise & Sunset with Twilight in the Summer at Chevak AirportJunJulAug4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMSpringFall5:18 AM5:18 AM12:49 AMJun 1812:49 AMJun 187:52 AM7:52 AM10:10 PMAug 3110:10 PMAug 315:33 AM5:33 AM6:34 AM6:34 AM11:41 PMAug 111:41 PMAug 1SolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the summer. 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.

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.

Solar Elevation and Azimuth in the Summer at Chevak Airport

Solar Elevation and Azimuth in the Summer at Chevak AirportJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFall0010202030304050010102030304040
northeastsouthwest
Solar elevation and azimuth in the the summer of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the summer of 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.

Moon Rise, Set & Phases in the Summer at Chevak Airport

Moon Rise, Set & Phases in the Summer at Chevak AirportJunJulAug12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallMay 77:23 PMMay 77:23 PMMay 235:54 AMMay 235:54 AMJun 64:38 AMJun 64:38 AMJun 215:09 PMJun 215:09 PMJul 52:58 PMJul 52:58 PMJul 212:18 AMJul 212:18 AMAug 43:14 AMAug 43:14 AMAug 1910:26 AMAug 1910:26 AMSep 25:56 PMSep 25:56 PMSep 176:35 PMSep 176:35 PM6:10 AM6:10 AM5:07 AM5:07 AM4:13 AM4:13 AM2:08 AM2:08 AM5:32 AM5:32 AM11:16 PM11:16 PM6:50 AM6:50 AM9:17 PM9:17 PM9:44 AM9:44 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.

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 Chevak Airport is essentially constant during the summer, remaining around 0% throughout.

For reference, on July 25, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Summer at Chevak Airport

Humidity Comfort Levels in the Summer at Chevak AirportJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallAug 90%Aug 90%Jun 10%Jun 10%Aug 310%Aug 310%Jul 10%Jul 10%drydrycomfortablecomfortable
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.

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 Chevak Airport is increasing during the summer, increasing from 10.4 miles per hour to 11.9 miles per hour over the course of the season.

For reference, on February 11, the windiest day of the year, the daily average wind speed is 16.5 miles per hour, while on June 29, the calmest day of the year, the daily average wind speed is 9.5 miles per hour.

The lowest daily average wind speed during the summer is 9.5 miles per hour on June 29.

Average Wind Speed in the Summer at Chevak Airport

Average Wind Speed in the Summer at Chevak AirportJunJulAug0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mphSpringFallJun 299.5 mphJun 299.5 mphJun 110.4 mphJun 110.4 mphAug 3111.9 mphAug 3111.9 mphAug 110.6 mphAug 110.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction at Chevak Airport during the summer is predominantly out of the north from June 1 to June 24 and from August 19 to August 31, the south from June 24 to July 31 and from August 16 to August 19, and the west from July 31 to August 16.

Wind Direction in the Summer at Chevak Airport

Wind Direction in the Summer at Chevak AirportNSWNJunJulAug0%100%20%80%40%60%60%40%80%20%100%0%SpringFallwestsoutheastnorth
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).

Chevak 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 Chevak Airport is very rapidly increasing during the summer, rising by 13°F, from 38°F to 51°F, over the course of the season.

The highest average surface water temperature during the summer is 52°F on August 18.

Average Water Temperature in the Summer at Chevak Airport

Average Water Temperature in the Summer at Chevak AirportJunJulAug30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FSpringFallAug 1852°FAug 1852°FJun 138°FJun 138°FJul 146°FJul 146°FAug 151°FAug 151°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Chevak Airport typically lasts for 4.1 months (125 days), from around May 27 to around September 29, rarely starting before May 9 or after June 13, and rarely ending before September 14 or after October 15.

The summer at Chevak Airport is more likely than not fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 30.

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Chevak Airport

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Chevak Airportgrowing seasonJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFall64%Jun 164%Jun 1100%Aug 31100%Aug 31100%Jul 1100%Jul 1100%Aug 1100%Aug 150%Sep 2950%Sep 2990%Sep 1490%Sep 14May 910%May 910%very coldcoldcoolfrigid
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 at Chevak Airport are increasing during the summer, increasing by 266°F, from 15°F to 280°F, over the course of the season.

Growing Degree Days in the Summer at Chevak Airport

Growing Degree Days in the Summer at Chevak AirportJunJulAug50°F50°F100°F100°F150°F150°F200°F200°F250°F250°F300°F300°F350°F350°F400°F400°FSpringFallJun 115°FJun 115°FAug 31280°FAug 31280°FJul 183°FJul 183°FAug 1195°FAug 1195°F
The average growing degree days accumulated over the course of the summer, with 25th to 75th and 10th to 90th percentile bands.

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 Chevak Airport is very rapidly decreasing during the summer, falling by 2.3 kWh, from 5.2 kWh to 2.9 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 5.2 kWh on June 4.

Average Daily Incident Shortwave Solar Energy in the Summer at Chevak Airport

Average Daily Incident Shortwave Solar Energy in the Summer at Chevak AirportJunJulAug0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallJun 45.2 kWhJun 45.2 kWhAug 312.9 kWhAug 312.9 kWhJul 14.7 kWhJul 14.7 kWhAug 13.8 kWhAug 13.8 kWh
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 Chevak Airport are 61.537 deg latitude, -165.603 deg longitude, and 39 ft elevation.

The topography within 2 miles of Chevak Airport is essentially flat, with a maximum elevation change of 75 feet and an average elevation above sea level of 25 feet. Within 10 miles is essentially flat (131 feet). Within 50 miles contains only modest variations in elevation (2,388 feet).

The area within 2 miles of Chevak Airport is covered by shrubs (47%), herbaceous vegetation (28%), and sparse vegetation (24%), within 10 miles by herbaceous vegetation (35%) and shrubs (34%), and within 50 miles by water (55%) and herbaceous vegetation (20%).

This report illustrates the typical weather at Chevak Airport, 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

Chevak 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 include but are not limited to Scammon Bay Airport, Cape Romanzof LRRS Airport, Hooper Bay Airport, Toksook Bay Airport, Mekoryuk Airport, Emmonak Airport, Mountain Village Airport, and St. Mary's 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 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 © OpenStreetMap contributors.

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.

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