Average Weather at Omak Airport Washington, United States
At Omak Airport, the summers are hot and partly cloudy, the winters are freezing and mostly cloudy, and it is dry year round. Over the course of the year, the temperature typically varies from 22°F to 91°F and is rarely below 7°F or above 100°F.
The hot season lasts for 3.0 months, from June 13 to September 14, with an average daily high temperature above 79°F. The hottest day of the year is August 1, with an average high of 91°F and low of 60°F.
The cold season lasts for 3.2 months, from November 16 to February 22, with an average daily high temperature below 44°F. The coldest day of the year is December 30, with an average low of 22°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 Omak 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 Omak Airport begins around June 9 and lasts for 3.9 months, ending around October 6. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 78% of the time, and overcast or mostly cloudy 22% of the time.
The cloudier part of the year begins around October 6 and lasts for 8.1 months, ending around June 9. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 67% of the time, and clear, mostly clear, or partly cloudy 33% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Omak Airport varies throughout the year.
The wetter season lasts 7.3 months, from October 23 to June 2, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 31% on November 28.
The drier season lasts 4.7 months, from June 2 to October 23. The smallest chance of a wet day is 7% on August 17.
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 Omak Airport changes throughout the year.
Rain alone is the most common for 10 months, from January 27 to December 8. The highest chance of a day with rain alone is 24% on November 10.
Snow alone is the most common for 1.6 months, from December 8 to January 27. The highest chance of a day with snow alone is 15% on December 28.
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. Omak Airport experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 10.0 months, from September 20 to July 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 17, with an average total accumulation of 1.6 inches.
The rainless period of the year lasts for 2.0 months, from July 19 to September 20. The least rain falls around August 19, with an average total accumulation of 0.4 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. Omak Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.4 months, from October 30 to March 12, 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 28, with an average total liquid-equivalent accumulation of 0.9 inches.
The snowless period of the year lasts for 7.6 months, from March 12 to October 30. The least snow falls around July 10, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at Omak Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 18 minutes of daylight; the longest day is June 20, with 16 hours, 7 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:55 AM on June 16, and the latest sunrise is 2 hours, 54 minutes later at 7:49 AM on January 1. The earliest sunset is at 4:02 PM on December 11, and the latest sunset is 5 hours, 1 minute later at 9:03 PM on June 25.
Daylight saving time (DST) is observed at Omak 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
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 Omak 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
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 Omak Airport does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 2.5 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction at Omak Airport varies throughout the year.
The wind is most often from the south for 1.3 weeks, from January 13 to January 22; for 3.6 weeks, from February 22 to March 19; and for 2.6 months, from October 9 to December 27, with a peak percentage of 44% on November 10. The wind is most often from the north for 1.0 months, from January 22 to February 22; for 2.8 months, from July 15 to October 9; and for 2.4 weeks, from December 27 to January 13, with a peak percentage of 42% on August 7. The wind is most often from the west for 3.9 months, from March 19 to July 15, with a peak percentage of 40% on June 23.
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 extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.3 months, from May 12 to August 21, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is July 14, with an average of 7.5 kWh.
The darker period of the year lasts for 3.7 months, from October 24 to February 16, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest day of the year is December 24, with an average of 1.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Omak Airport are 48.464 deg latitude, -119.518 deg longitude, and 1,280 ft elevation.
The topography within 2 miles of Omak Airport contains very significant variations in elevation, with a maximum elevation change of 823 feet and an average elevation above sea level of 1,254 feet. Within 10 miles contains very significant variations in elevation (4,915 feet). Within 50 miles also contains extreme variations in elevation (8,159 feet).
The area within 2 miles of Omak Airport is covered by shrubs (40%), grassland (31%), and cropland (29%), within 10 miles by shrubs (67%) and grassland (21%), and within 50 miles by shrubs (40%) and trees (28%).
This report illustrates the typical weather at Omak 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
Omak 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 Osoyoos Automatic Weather Reporting System, Penticton Regional Airport, Summerland Automatic Weather Reporting System, Ephrata Municipal Airport, Pangborn Field, Grant County International Airport, Princeton Automatic Weather Reporting System, and Kelowna International Airport.
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.