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Average Weather at Cold Bay Airport Alaska, United States

At Cold Bay Airport, the summers are cool, windy, and overcast and the winters are long, freezing, extremely windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 25°F to 57°F and is rarely below 11°F or above 62°F.

Climate Summary

very coldcoldcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec43%43%22%22%overcastclearprecipitation: 3.4 inprecipitation: 3.4 in1.5 in1.5 inmuggy: 0%muggy: 0%drydrytourism score: 1.3tourism score: 1.30.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Cold Bay Airport for warm-weather activities is from late July to late August.

Temperature

The warm season lasts for 3.0 months, from June 20 to September 20, with an average daily high temperature above 52°F. The hottest day of the year is August 12, with an average high of 57°F and low of 49°F.

The cold season lasts for 4.4 months, from November 25 to April 7, with an average daily high temperature below 38°F. The coldest day of the year is January 22, with an average low of 25°F and high of 33°F.

Average High and Low Temperature

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 entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingvery coldvery coldcoldfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Andenes, Norway (3,837 miles away) is the far-away foreign place with temperatures most similar to Cold Bay Airport (view comparison).

Clouds

At Cold Bay Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Cold Bay Airport begins around August 31 and lasts for 2.6 months, ending around November 19. On October 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 43% of the time, and overcast or mostly cloudy 57% of the time.

The cloudier part of the year begins around November 19 and lasts for 9.4 months, ending around August 31. On July 8, the cloudiest day of the year, the sky is overcast or mostly cloudy 78% of the time, and clear, mostly clear, or partly cloudy 22% of the time.

Cloud Cover Categories

Cloud Cover Categories at Cold Bay AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 1043%Oct 1043%Jul 822%Jul 822%Aug 3132%Aug 3132%Nov 1933%Nov 1933%clearmostly clearpartly cloudymostly cloudyovercast
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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Cold Bay Airport varies throughout the year.

The wetter season lasts 6.1 months, from July 26 to January 31, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 43% on September 6.

The drier season lasts 5.9 months, from January 31 to July 26. The smallest chance of a wet day is 23% on May 7.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 43% on September 6.

Daily Chance of Precipitation

Daily Chance of Precipitation at Cold Bay AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 643%Sep 643%May 723%May 723%Jan 136%Jan 136%Jul 2633%Jul 2633%Jan 3133%Jan 3133%rainmixedsnow
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 months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Cold Bay Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Cold Bay Airport. The most rain falls during the 31 days centered around September 17, with an average total accumulation of 3.4 inches.

The least rain falls around March 27, with an average total accumulation of 1.3 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 in6 inSep 173.4 inSep 173.4 inMar 271.3 inMar 271.3 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 liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Cold Bay Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.6 months, from November 8 to April 25, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 3, with an average total liquid-equivalent accumulation of 0.4 inches.

The snowless period of the year lasts for 6.4 months, from April 25 to November 8. The least snow falls around August 12, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Cold Bay AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 in3.5 inFeb 30.4 inFeb 30.4 inAug 120.0 inAug 120.0 inNov 80.1 inNov 80.1 inApr 250.1 inApr 250.1 in
The average liquid-equivalent 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.

Sun

The length of the day at Cold Bay Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 7 hours, 7 minutes of daylight; the longest day is June 20, with 17 hours, 26 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2017 hr, 26 minJun 2017 hr, 26 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 227 hr, 7 minDec 217 hr, 7 minDec 21nightnightday
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 is at 6:09 AM on June 17, and the latest sunrise is 4 hours, 8 minutes later at 10:17 AM on December 28. The earliest sunset is at 5:20 PM on December 12, and the latest sunset is 6 hours, 15 minutes later at 11:35 PM on June 23.

Daylight saving time (DST) is observed at Cold Bay Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJun 176:09 AMJun 176:09 AM11:35 PMJun 2311:35 PMJun 23Dec 125:20 PMDec 125:20 PM10:17 AMDec 2810:17 AMDec 28Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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 transitions to and from daylight saving time are indicated by the 'DST' labels.

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 perceived humidity level at Cold Bay Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 30%Jul 30%drydrycomfortablecomfortable
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.

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 at Cold Bay Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from September 13 to April 22, with average wind speeds of more than 14.6 miles per hour. The windiest day of the year is November 25, with an average hourly wind speed of 18.5 miles per hour.

The calmer time of year lasts for 4.7 months, from April 22 to September 13. The calmest day of the year is July 17, with an average hourly wind speed of 10.7 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Cold Bay Airport varies throughout the year.

The wind is most often from the south for 3.1 weeks, from June 17 to July 9, with a peak percentage of 32% on July 7. The wind is most often from the west for 2.9 months, from July 9 to October 7, with a peak percentage of 38% on August 29. The wind is most often from the north for 8.3 months, from October 7 to June 17, with a peak percentage of 31% on January 1.

Wind Direction

Wind Direction at Cold Bay AirportNSWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
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

Cold Bay 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.9 months, from July 10 to October 6, with an average temperature above 48°F. The day of the year with the warmest water is August 21, with an average temperature of 51°F.

The time of year with cooler water lasts for 4.1 months, from January 6 to May 11, with an average temperature below 39°F. The day of the year with the coolest water is March 14, with an average temperature of 36°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is at Cold Bay Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Cold Bay Airport for general outdoor tourist activities is from late July to late August, with a peak score in the second week of August.

Tourism Score

Tourism Score at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec02468101.31.30.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Beach/Pool Score

Beach/Pool Score at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec02468100.00.00.00.0precipitationprecipitationcloudsclouds
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 at Cold Bay Airport typically lasts for 4.9 months (149 days), from around May 18 to around October 14, rarely starting before May 1 or after June 6, and rarely ending before September 21 or after November 2.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Cold Bay Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 1850%May 1850%Oct 1450%Oct 1450%Jun 690%Jun 690%Sep 2190%Sep 2190%May 110%May 110%Nov 210%Nov 210%0%Feb 220%Feb 22Aug 1100%Aug 1100%freezingvery coldcoldcoolfrigid
The percentage of time spent in various temperature bands: 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 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.

Based on growing degree days alone, the first spring blooms at Cold Bay Airport should appear around August 9, only rarely appearing before July 24 or after October 15.

Growing Degree Days

Growing Degree Days at Cold Bay AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F50°F100°F150°F200°F250°FAug 990°FAug 990°FDec 31174°FDec 31174°F
The average growing degree days accumulated over the course of the year, 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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from April 25 to August 7, with an average daily incident shortwave energy per square meter above 4.0 kWh. The brightest day of the year is June 1, with an average of 4.9 kWh.

The darker period of the year lasts for 3.8 months, from October 25 to February 17, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest day of the year is December 18, with an average of 0.4 kWh.

Average Daily Incident Shortwave Solar Energy

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 Cold Bay Airport are 55.206 deg latitude, -162.724 deg longitude, and 62 ft elevation.

The topography within 2 miles of Cold Bay Airport contains only modest variations in elevation, with a maximum elevation change of 167 feet and an average elevation above sea level of 53 feet. Within 10 miles contains only modest variations in elevation (4,206 feet). Within 50 miles also contains extreme variations in elevation (8,182 feet).

The area within 2 miles of Cold Bay Airport is covered by water (41%), shrubs (28%), and herbaceous vegetation (15%), within 10 miles by water (49%) and shrubs (36%), and within 50 miles by water (73%) and shrubs (17%).

Data Sources

This report illustrates the typical weather at Cold Bay 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

Cold Bay 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 King Cove Airport, False Pass Airport, Nelson Lagoon Airport, and Sand Point 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.

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.