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Summer Weather at Barter Island LRRS Airport Alaska, United States

Daily high temperatures increase by 6°F, from 36°F to 42°F, rarely falling below 29°F or exceeding 59°F. The highest daily average high temperature is 48°F on July 31.

Daily low temperatures increase by 7°F, from 28°F to 35°F, rarely falling below 21°F or exceeding 46°F. The highest daily average low temperature is 39°F on July 31.

For reference, on July 31, the hottest day of the year, temperatures at Barter Island LRRS Airport typically range from 39°F to 48°F, while on February 9, the coldest day of the year, they range from -18°F to -6°F.

Average High and Low Temperature in the Summer at Barter Island LRRS Airport

Average High and Low Temperature in the Summer at Barter Island LRRS AirportJunJulAug-10°F-10°F0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°FSpringFallJul 3148°FJul 3148°F39°F39°FJun 136°FJun 136°F28°F28°FAug 3142°FAug 3142°F35°F35°FJul 144°FJul 144°F35°F35°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 Barter Island LRRS Airport

Average Hourly Temperature in the Summer at Barter Island LRRS 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 AMSpringFallfreezingvery coldfreezingfrigid
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.

Kogalym, Russia (3,108 miles away) and McMurdo Station, Antarctica (10,433 miles) are the far-away foreign places with temperatures most similar to Barter Island LRRS Airport (view comparison).

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The summer at Barter Island LRRS Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 64% to 71%. The highest chance of overcast or mostly cloudy conditions is 72% on August 12. The lowest chance of overcast or mostly cloudy conditions is 64% on June 11.

The clearest day of the summer is June 11, with clear, mostly clear, or partly cloudy conditions 36% of the time.

For reference, on January 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 84%, while on June 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 36%.

Cloud Cover Categories in the Summer at Barter Island LRRS Airport

Cloud Cover Categories in the Summer at Barter Island LRRS AirportJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallJun 1136%Jun 1136%Jan 1716%Jan 1716%Aug 3129%Aug 3129%Jul 134%Jul 134%Aug 129%Aug 129%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 Barter Island LRRS Airport, the chance of a wet day over the course of the summer is rapidly increasing, starting the season at 12% and ending it at 20%.

For reference, the year's highest daily chance of a wet day is 24% on August 14, and its lowest chance is 2% on March 4.

Over the course of the summer at Barter Island LRRS Airport, the chance of a day with only rain increases from 6% to 17%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow decreases from 4% to 1%.

Probability of Precipitation in the Summer at Barter Island LRRS Airport

Probability of Precipitation in the Summer at Barter Island LRRS AirportJunJulAug0%0%5%5%10%10%15%15%20%20%25%25%SpringFallAug 1424%Aug 1424%Jun 112%Jun 112%Aug 3120%Aug 3120%Jul 115%Jul 115%snowrainmixed
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 Barter Island LRRS Airport is increasing, starting the season at 0.4 inches, when it rarely exceeds 1.1 inches, and ending the season at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.2 inches.

The highest average 31-day accumulation is 1.4 inches on August 9.

Average Monthly Rainfall in the Summer at Barter Island LRRS Airport

Average Monthly Rainfall in the Summer at Barter Island LRRS AirportJunJulAug0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inSpringFallAug 81.4 inAug 81.4 inJun 10.4 inJun 10.4 inAug 311.1 inAug 311.1 inJul 10.9 inJul 10.9 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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the summer at Barter Island LRRS Airport is gradually decreasing, starting the season at 2.2 inches, when it rarely exceeds 4.7 inches, and ending the season at 1.4 inches, when it rarely exceeds 4.5 inches or falls below -0.0 inches.

The lowest average 31-day accumulation is 0.2 inches on July 22.

Average Monthly Snowfall in the Summer at Barter Island LRRS Airport

Average Monthly Snowfall in the Summer at Barter Island LRRS AirportJunJulAug0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 in8 in8 inSpringFallJul 220.2 inJul 220.2 inJun 12.2 inJun 12.2 inAug 311.4 inAug 311.4 inJul 10.5 inJul 10.5 in
The average snowfall (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 rainfall.

Due to its extreme latitude, Barter Island LRRS 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 Barter Island LRRS Airport during 2022, the Sun is continuously above the horizon for 2.4 months, rising at 1:55 AM on May 15, and not setting again until 1:20 AM on July 28. As such, summer begins in polar day, which ends before summer is over.

The shortest day of the summer is August 31, with 15 hours, 35 minutes of daylight.

Hours of Daylight and Twilight in the Summer at Barter Island LRRS Airport

Hours of Daylight and Twilight in the Summer at Barter Island LRRS AirportJunJulAug0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFall24 hr, 0 minJun 2124 hr, 0 minJun 2115 hr, 35 minAug 3115 hr, 35 minAug 3121 hr, 15 minAug 121 hr, 15 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 Barter Island LRRS Airport is 2:02 AM on July 28 and the latest sunrise is 3 hours, 43 minutes later at 5:45 AM on August 31.

The latest sunset is 1:20 AM on July 27 and the earliest sunset is 4 hours, 0 minutes earlier at 9:20 PM on August 31.

Daylight saving time is observed at Barter Island LRRS Airport during 2022, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.

Sunrise & Sunset with Twilight in the Summer at Barter Island LRRS Airport

Sunrise & Sunset with Twilight in the Summer at Barter Island LRRS AirportJunJulAug2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSpringFall1:20 AMJul 271:20 AMJul 272:02 AM2:02 AM5:45 AM5:45 AM9:20 PMAug 319:20 PMAug 31SolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Barter Island LRRS Airport

Solar Elevation and Azimuth in the Summer at Barter Island LRRS 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 AMSpringFall00102020303040010102030
northeastsouthwest
Solar elevation and azimuth in the the summer of 2022. 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 2022. 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 Barter Island LRRS Airport

Moon Rise, Set & Phases in the Summer at Barter Island LRRS AirportJunJulAug12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallMay 303:31 AMMay 303:31 AMJun 286:53 PMJun 286:53 PMJul 289:56 AMJul 289:56 AMAug 115:36 PMAug 115:36 PMAug 2712:18 AMAug 2712:18 AMSep 102:00 AMSep 102:00 AMSep 251:55 PMSep 251:55 PM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM10:47 PM10:47 PM6:19 AM6:19 AM7:47 PM7:47 PM
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 Barter Island LRRS Airport is essentially constant during the summer, remaining around 0% throughout.

Humidity Comfort Levels in the Summer at Barter Island LRRS Airport

Humidity Comfort Levels in the Summer at Barter Island LRRS AirportJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallJun 10%Jun 10%Aug 310%Aug 310%Jul 10%Jul 10%Aug 10%Aug 10%drydry
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 Barter Island LRRS Airport is essentially constant during the summer, remaining within 0.8 miles per hour of 9.5 miles per hour throughout.

For reference, on January 13, the windiest day of the year, the daily average wind speed is 13.0 miles per hour, while on July 12, the calmest day of the year, the daily average wind speed is 8.6 miles per hour.

The lowest daily average wind speed during the summer is 8.6 miles per hour on July 12.

Average Wind Speed in the Summer at Barter Island LRRS Airport

Average Wind Speed in the Summer at Barter Island LRRS AirportJunJulAug0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mphSpringFallJul 128.6 mphJul 128.6 mphJun 110.3 mphJun 110.3 mphAug 319.8 mphAug 319.8 mphAug 18.9 mphAug 18.9 mph
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 Barter Island LRRS Airport throughout the summer is predominantly from the east, with a peak proportion of 63% on June 1.

Wind Direction in the Summer at Barter Island LRRS Airport

Wind Direction in the Summer at Barter Island LRRS AirportJunJulAug0%100%20%80%40%60%60%40%80%20%100%0%SpringFallwesteastnorthsouth
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).

Barter Island LRRS 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 Barter Island LRRS Airport is increasing during the summer, rising by 6°F, from 30°F to 36°F, over the course of the season.

The highest average surface water temperature during the summer is 37°F on August 16.

Average Water Temperature in the Summer at Barter Island LRRS Airport

Average Water Temperature in the Summer at Barter Island LRRS AirportJunJulAug28°F28°F30°F30°F32°F32°F34°F34°F36°F36°F38°F38°F40°F40°F42°F42°F44°F44°FSpringFallAug 1637°FAug 1637°FJun 130°FJun 130°FAug 3136°FAug 3136°FJul 133°FJul 133°FAug 136°FAug 136°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 Barter Island LRRS Airport typically lasts for 1.4 months (44 days), from around July 5 to around August 18, rarely starting before June 12, or ending after September 16.

The largest chance that a given day will be within the growing season at Barter Island LRRS Airport during the summer is 74% on July 29.

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Barter Island LRRS Airport

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Barter Island LRRS Airportgrowing seasonJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallJun 11%Jun 11%Aug 3128%Aug 3128%Jul 142%Jul 142%73%Aug 173%Aug 1Sep 1610%Sep 1610%Jul 2974%Jul 2974%frigidfreezingvery coldcoldcool
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 Barter Island LRRS Airport are essentially constant during the summer, remaining within 14°F of 14°F throughout.

Growing Degree Days in the Summer at Barter Island LRRS Airport

Growing Degree Days in the Summer at Barter Island LRRS AirportJunJulAug0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°FSpringFallJun 10°FJun 10°FAug 3128°FAug 3128°FJul 13°FJul 13°FAug 117°FAug 117°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 Barter Island LRRS Airport is very rapidly decreasing during the summer, falling by 3.4 kWh, from 5.8 kWh to 2.5 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.0 kWh on June 11.

Average Daily Incident Shortwave Solar Energy in the Summer at Barter Island LRRS Airport

Average Daily Incident Shortwave Solar Energy in the Summer at Barter Island LRRS AirportJunJulAug0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallJun 116.0 kWhJun 116.0 kWhAug 312.5 kWhAug 312.5 kWhJul 15.7 kWhJul 15.7 kWhAug 14.0 kWhAug 14.0 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 Barter Island LRRS Airport are 70.135 deg latitude, -143.581 deg longitude, and 0 ft elevation.

The topography within 2 miles of Barter Island LRRS Airport is essentially flat, with a maximum elevation change of 62 feet and an average elevation above sea level of 7 feet. Within 10 miles is essentially flat (157 feet). Within 50 miles contains only modest variations in elevation (4,613 feet).

The area within 2 miles of Barter Island LRRS Airport is covered by water (73%) and snow and glaciers (21%), within 10 miles by water (65%) and sparse vegetation (18%), and within 50 miles by water (62%) and grassland (18%).

This report illustrates the typical weather at Barter Island LRRS 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

Barter Island LRRS 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 Komakuk Beach, Y. T.; Ivvavik Park Automatic Weather Reporting System; and Deadhorse 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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