Average Weather at St. George Airport Alaska, United States
At St. George Airport, the summers are cold and windy; the winters are long, freezing, and extremely windy; and it is overcast year round. Over the course of the year, the temperature typically varies from 24°F to 52°F and is rarely below 9°F or above 56°F.
Based on the tourism score, the best time of year to visit St. George Airport for warm-weather activities is for the entire month of August.
The warm season lasts for 3.0 months, from June 23 to September 24, with an average daily high temperature above 48°F. The hottest day of the year is August 13, with an average high of 52°F and low of 46°F.
The cold season lasts for 4.4 months, from December 2 to April 15, with an average daily high temperature below 35°F. The coldest day of the year is February 12, with an average low of 24°F and high of 31°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
At St. George 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 St. George Airport begins around September 5 and lasts for 2.8 months, ending around November 29. On October 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 36% of the time, and overcast or mostly cloudy 64% of the time.
The cloudier part of the year begins around November 29 and lasts for 9.2 months, ending around September 5. On July 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 89% of the time, and clear, mostly clear, or partly cloudy 11% 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 St. George Airport varies throughout the year.
The wetter season lasts 8.0 months, from July 6 to March 8, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 37% on September 2.
The drier season lasts 4.0 months, from March 8 to July 6. The smallest chance of a wet day is 17% on May 8.
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 37% on September 2.
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. St. George Airport experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year at St. George Airport. The most rain falls during the 31 days centered around August 24, with an average total accumulation of 2.9 inches.
The least rain falls around March 29, with an average total accumulation of 0.9 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. St. George Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.1 months, from November 4 to May 9, 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 9, with an average total liquid-equivalent accumulation of 0.7 inches.
The snowless period of the year lasts for 5.9 months, from May 9 to November 4. The least snow falls around August 2, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at St. George Airport varies extremely over the course of the year. In 2018, the shortest day is December 21, with 6 hours, 49 minutes of daylight; the longest day is June 21, with 17 hours, 47 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:26 AM on June 18, and the latest sunrise is 4 hours, 27 minutes later at 9:54 AM on December 28. The earliest sunset is at 4:39 PM on December 14, and the latest sunset is 6 hours, 34 minutes later at 11:13 PM on June 23.
Daylight saving time (DST) is observed at St. George 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 St. George 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 St. George Airport experiences extreme seasonal variation over the course of the year.
The windier part of the year lasts for 7.4 months, from September 13 to April 26, with average wind speeds of more than 17.1 miles per hour. The windiest day of the year is January 21, with an average hourly wind speed of 22.0 miles per hour.
The calmer time of year lasts for 4.6 months, from April 26 to September 13. The calmest day of the year is July 15, with an average hourly wind speed of 12.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at St. George Airport varies throughout the year.
The wind is most often from the east for 2.4 weeks, from February 12 to March 1 and for 3.1 weeks, from June 5 to June 27, with a peak percentage of 35% on February 17. The wind is most often from the north for 3.1 months, from March 1 to June 5 and for 4.8 months, from September 17 to February 12, with a peak percentage of 39% on April 20. The wind is most often from the west for 2.7 months, from June 27 to September 17, with a peak percentage of 36% on August 8.
St. George 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 2.5 months, from July 17 to October 1, with an average temperature above 46°F. The day of the year with the warmest water is August 23, with an average temperature of 48°F.
The time of year with cooler water lasts for 4.6 months, from January 2 to May 21, with an average temperature below 38°F. The day of the year with the coolest water is March 24, with an average temperature of 36°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at St. George 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 St. George Airport for general outdoor tourist activities is for the entire month of August, with a peak score in the second week of August.
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 St. George Airport for hot-weather activities is from mid July to mid August, with a peak score in the third 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 St. George Airport typically lasts for 4.0 months (121 days), from around June 1 to around October 1, rarely starting before May 13 or after June 25, and rarely ending before September 8 or after October 27.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
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 2.8 months, from April 25 to July 17, with an average daily incident shortwave energy per square meter above 3.7 kWh. The brightest day of the year is May 30, with an average of 4.6 kWh.
The darker period of the year lasts for 3.9 months, from October 23 to February 20, with an average daily incident shortwave energy per square meter below 1.1 kWh. The darkest day of the year is December 17, with an average of 0.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of St. George Airport are 56.578 deg latitude, -169.663 deg longitude, and 138 ft elevation.
The topography within 2 miles of St. George Airport contains very significant variations in elevation, with a maximum elevation change of 961 feet and an average elevation above sea level of 210 feet. Within 10 miles also contains very significant variations in elevation (974 feet). Within 50 miles also contains very significant variations in elevation (991 feet).
The area within 2 miles of St. George Airport is covered by water (32%), grassland (25%), sparse vegetation (24%), and shrubs (19%), within 10 miles by water (91%), and within 50 miles by water (99%).
This report illustrates the typical weather at St. George 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
St. George 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.
In this case, the only station close and reliable enough to use as a fallback is Saint Paul Island Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .