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Average Weather at Nelson Lagoon Airport Alaska, United States

At Nelson Lagoon Airport, the summers are short, cool, and overcast and the winters are long, freezing, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 25°F to 58°F and is rarely below 11°F or above 65°F.

Climate Summary

very coldcoldcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec43%43%23%23%overcastclearprecipitation: 2.9 inprecipitation: 2.9 in1.2 in1.2 inmuggy: 0%muggy: 0%drydrytourism score: 1.7tourism score: 1.70.00.0
Click on each chart for more information.

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

Temperature

The warm season lasts for 2.8 months, from June 25 to September 17, with an average daily high temperature above 53°F. The hottest day of the year is August 4, with an average high of 58°F and low of 49°F.

The cold season lasts for 4.5 months, from November 26 to April 12, with an average daily high temperature below 37°F. The coldest day of the year is January 22, with an average low of 25°F and high of 32°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 Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingvery coldvery coldcoldcoolfreezing
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 (3,781 miles away) is the far-away foreign place with temperatures most similar to Nelson Lagoon Airport (view comparison).

Clouds

At Nelson Lagoon Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Nelson Lagoon Airport begins around August 31 and lasts for 2.6 months, ending around November 17. 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 17 and lasts for 9.5 months, ending around August 31. On July 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 77% of the time, and clear, mostly clear, or partly cloudy 23% of the time.

Cloud Cover Categories

Cloud Cover Categories at Nelson Lagoon 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 1523%Jul 1523%Aug 3133%Aug 3133%Nov 1733%Nov 1733%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 Nelson Lagoon Airport varies throughout the year.

The wetter season lasts 5.5 months, from July 20 to January 2, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on September 15.

The drier season lasts 6.5 months, from January 2 to July 20. The smallest chance of a wet day is 20% on May 4.

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 40% on September 15.

Daily Chance of Precipitation

Daily Chance of Precipitation at Nelson Lagoon AirportwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 1540%Sep 1540%May 420%May 420%Jan 131%Jan 131%Jul 2030%Jul 2030%Jan 230%Jan 230%mixedrainsnow
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. Nelson Lagoon Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Nelson Lagoon Airport. The most rain falls during the 31 days centered around September 17, with an average total accumulation of 2.9 inches.

The least rain falls around March 18, with an average total accumulation of 0.8 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inSep 172.9 inSep 172.9 inMar 180.8 inMar 180.8 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. Nelson Lagoon Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.4 months, from November 12 to April 24, 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 1, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 6.6 months, from April 24 to November 12. The least snow falls around August 14, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Nelson Lagoon AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 inFeb 10.5 inFeb 10.5 inAug 140.0 inAug 140.0 inNov 120.1 inNov 120.1 inApr 240.1 inApr 240.1 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 Nelson Lagoon Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 6 hours, 57 minutes of daylight; the longest day is June 20, with 17 hours, 38 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 10 minMar 2012 hr, 10 minMar 2017 hr, 38 minJun 2017 hr, 38 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 226 hr, 57 minDec 216 hr, 57 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 5:57 AM on June 17, and the latest sunrise is 4 hours, 19 minutes later at 10:16 AM on December 28. The earliest sunset is at 5:09 PM on December 14, and the latest sunset is 6 hours, 26 minutes later at 11:35 PM on June 23.

Daylight saving time (DST) is observed at Nelson Lagoon 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 Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJun 175:57 AMJun 175:57 AM11:35 PMJun 2311:35 PMJun 23Dec 145:09 PMDec 145:09 PM10:16 AMDec 2810:16 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 Nelson Lagoon 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 Nelson Lagoon 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 Nelson Lagoon Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from September 13 to April 19, with average wind speeds of more than 13.5 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 17.4 miles per hour.

The calmer time of year lasts for 4.8 months, from April 19 to September 13. The calmest day of the year is July 13, with an average hourly wind speed of 9.6 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 Nelson Lagoon Airport varies throughout the year.

The wind is most often from the south for 1.0 months, from June 6 to July 6, with a peak percentage of 31% on July 2. The wind is most often from the west for 3.0 months, from July 6 to October 7, with a peak percentage of 39% on August 27. The wind is most often from the north for 8.0 months, from October 7 to June 6, with a peak percentage of 30% on January 1.

Wind Direction

Wind Direction at Nelson Lagoon 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

Nelson Lagoon 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 11 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 52°F.

The time of year with cooler water lasts for 4.3 months, from January 2 to May 13, with an average temperature below 38°F. The day of the year with the coolest water is March 17, with an average temperature of 34°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 Nelson Lagoon 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 Nelson Lagoon Airport for general outdoor tourist activities is from late July to late August, with a peak score in the third week of August.

Tourism Score

Tourism Score at Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec02468101.71.70.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
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. Based on this score, the best time of year to visit Nelson Lagoon Airport for hot-weather activities is from late July to early August.

Beach/Pool Score

Beach/Pool Score at Nelson Lagoon 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 Nelson Lagoon Airport typically lasts for 5.4 months (165 days), from around May 16 to around October 28, rarely starting before April 27 or after June 2, and rarely ending before October 11 or after November 15.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Nelson Lagoon Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 1650%May 1650%Oct 2850%Oct 2850%Jun 290%Jun 290%Oct 1190%Oct 1190%Apr 2710%Apr 2710%Nov 1510%Nov 1510%Aug 7100%Aug 7100%freezingvery coldcoldfrigidcool
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 Nelson Lagoon Airport should appear around August 4, only rarely appearing before July 21 or after September 4.

Growing Degree Days

Growing Degree Days at Nelson Lagoon AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F50°F100°F150°F200°F250°F300°FAug 490°FAug 490°FDec 31209°FDec 31209°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 3.1 months, from April 26 to July 31, with an average daily incident shortwave energy per square meter above 4.1 kWh. The brightest day of the year is June 2, with an average of 5.0 kWh.

The darker period of the year lasts for 3.8 months, from October 24 to February 18, 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 0.3 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Nelson Lagoon AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhJun 25.0 kWhJun 25.0 kWhDec 180.3 kWhDec 180.3 kWhApr 264.1 kWhApr 264.1 kWhJul 314.1 kWhJul 314.1 kWhOct 241.3 kWhOct 241.3 kWhFeb 181.3 kWhFeb 181.3 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.

Topography

For the purposes of this report, the geographical coordinates of Nelson Lagoon Airport are 56.008 deg latitude, -161.168 deg longitude, and 0 ft elevation.

The topography within 2 miles of Nelson Lagoon Airport is essentially flat, with a maximum elevation change of 23 feet and an average elevation above sea level of 1 foot. Within 10 miles is essentially flat (151 feet). Within 50 miles contains only modest variations in elevation (8,182 feet).

The area within 2 miles of Nelson Lagoon Airport is covered by water (100%), within 10 miles by water (74%) and shrubs (21%), and within 50 miles by water (65%) and shrubs (26%).

Data Sources

This report illustrates the typical weather at Nelson Lagoon 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

Nelson Lagoon 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 Sand Point Airport, King Cove Airport, Cold Bay Airport, Port Heiden Airport, and Chignik 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.