Average Weather at Selawik Airport Alaska, United States
At Selawik Airport, the summers are cool and mostly cloudy and the winters are long, frigid, snowy, windy, and partly cloudy. Over the course of the year, the temperature typically varies from -14°F to 65°F and is rarely below -42°F or above 76°F.
Based on the tourism score, the best time of year to visit Selawik Airport for warm-weather activities is for the entire month of July.
The warm season lasts for 3.2 months, from June 1 to September 6, with an average daily high temperature above 52°F. The hottest day of the year is July 10, with an average high of 65°F and low of 51°F.
The cold season lasts for 4.6 months, from November 12 to April 1, with an average daily high temperature below 13°F. The coldest day of the year is January 19, with an average low of -14°F and high of 0°F.
Average High and Low Temperature
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
On May 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 54% of the time.
On December 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 63% of the time, and clear, mostly clear, or partly cloudy 37% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Selawik Airport varies throughout the year.
The wetter season lasts 3.0 months, from July 2 to October 3, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 33% on August 1.
The drier season lasts 9.0 months, from October 3 to July 2. The smallest chance of a wet day is 7% on March 19.
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 at Selawik Airport changes throughout the year.
Snow alone is the most common for 6.3 months, from October 17 to April 27. The highest chance of a day with snow alone is 16% on December 31.
Rain alone is the most common for 5.7 months, from April 27 to October 17. The highest chance of a day with rain alone is 33% on August 1.
Daily Chance of Precipitation
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. Selawik Airport experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 5.4 months, from May 7 to October 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 12, with an average total accumulation of 2.5 inches.
The rainless period of the year lasts for 6.6 months, from October 19 to May 7. The least rain falls around January 5, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
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. Selawik Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 8.0 months, from September 21 to May 21, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 30, with an average total liquid-equivalent accumulation of 0.8 inches.
The snowless period of the year lasts for 4.0 months, from May 21 to September 21. The least snow falls around July 19, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
Due to its extreme latitude, Selawik Airport experiences polar day (also known as the midnight Sun) during the summer. 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 Selawik Airport during 2018, the Sun is continuously above the horizon for 1.1 months, rising at 2:38 AM on June 5, and not setting again until 2:44 AM on July 7.
Hours of Daylight and Twilight
Daylight saving time (DST) is observed at Selawik Airport during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level at Selawik 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed at Selawik Airport experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from October 26 to April 10, with average wind speeds of more than 9.5 miles per hour. The windiest day of the year is January 9, with an average hourly wind speed of 11.6 miles per hour.
The calmer time of year lasts for 6.5 months, from April 10 to October 26. The calmest day of the year is June 20, with an average hourly wind speed of 7.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Selawik Airport varies throughout the year.
The wind is most often from the west for 3.4 months, from May 17 to August 30, with a peak percentage of 50% on June 27. The wind is most often from the east for 8.6 months, from August 30 to May 17, with a peak percentage of 59% on January 1.
Selawik 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 significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 1.6 months, from July 29 to September 16, with an average temperature above 46°F. The day of the year with the warmest water is August 21, with an average temperature of 50°F.
The time of year with cooler water lasts for 7.6 months, from October 23 to June 11, with an average temperature below 33°F. The day of the year with the coolest water is January 16, with an average temperature of 29°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at Selawik 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 Selawik Airport for general outdoor tourist activities is for the entire month of July, with a peak score in the second week of July.
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 Selawik Airport for hot-weather activities is from late June to mid July, with a peak score in the second week of July.
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.
The growing season at Selawik Airport typically lasts for 3.4 months (106 days), from around June 5 to around September 18, rarely starting before May 19 or after June 20, and rarely ending before August 28 or after October 7.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms at Selawik Airport should appear around June 23, only rarely appearing before June 14 or after July 4.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 2.7 months, from May 1 to July 25, with an average daily incident shortwave energy per square meter above 4.6 kWh. The brightest day of the year is June 20, with an average of 5.8 kWh.
The darker period of the year lasts for 4.7 months, from October 9 to March 1, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest day of the year is December 22, with an average of 0.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Selawik Airport are 66.601 deg latitude, -159.992 deg longitude, and 49 ft elevation.
The topography within 2 miles of Selawik Airport is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 39 feet. Within 10 miles is essentially flat (177 feet). Within 50 miles contains only modest variations in elevation (3,760 feet).
The area within 2 miles of Selawik Airport is covered by water (54%) and herbaceous vegetation (37%), within 10 miles by water (46%) and herbaceous vegetation (25%), and within 50 miles by shrubs (57%) and herbaceous vegetation (15%).
This report illustrates the typical weather at Selawik 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
Selawik 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 Bob Baker Memorial Airport, Robert (Bob) Curtis Memorial Airport, Buckland Airport, Ambler Airport, Ralph Wien Memorial Airport, Deering Airport, Shungnak Airport, and Noatak Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .