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Average Weather at Yakima Air Terminal Airport Washington, United States

At Yakima Air Terminal Airport, the summers are hot, dry, and mostly clear and the winters are short, very cold, and partly cloudy. Over the course of the year, the temperature typically varies from 23°F to 90°F and is rarely below 10°F or above 99°F.

Climate Summary

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec82%82%35%35%clearovercastprecipitation: 2.6 inprecipitation: 2.6 in0.2 in0.2 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 7.1tourism score: 7.10.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Yakima Air Terminal Airport for warm-weather activities is from early July to mid August.

Temperature

The hot season lasts for 3.0 months, from June 12 to September 13, with an average daily high temperature above 79°F. The hottest day of the year is July 31, with an average high of 90°F and low of 57°F.

The cold season lasts for 2.8 months, from November 19 to February 14, with an average daily high temperature below 46°F. The coldest day of the year is December 23, with an average low of 23°F and high of 36°F.

Average High and Low Temperature

Average High and Low Temperature at Yakima Air Terminal AirporthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FDec 2336°FDec 2336°FJul 3190°FJul 3190°F23°F23°F57°F57°FJun 1279°FJun 1279°FSep 1379°FSep 1379°FFeb 1446°FFeb 1446°F51°F51°F47°F47°F29°F29°F28°F28°FLowHigh
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 Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldvery coldcoldcoldcoolwarmhotfreezingfreezingcomfortablecomfortable
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.

Ivankovci, Macedonia (5,912 miles away) and Kayseri, Turkey (6,367 miles) are the far-away foreign places with temperatures most similar to Yakima Air Terminal Airport (view comparison).

Clouds

At Yakima Air Terminal 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 Yakima Air Terminal Airport begins around June 8 and lasts for 4.0 months, ending around October 8. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 82% of the time, and overcast or mostly cloudy 18% of the time.

The cloudier part of the year begins around October 8 and lasts for 8.0 months, ending around June 8. On January 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 65% of the time, and clear, mostly clear, or partly cloudy 35% of the time.

Cloud Cover Categories

Cloud Cover Categories at Yakima Air Terminal AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 382%Aug 382%Jan 1635%Jan 1635%Jun 858%Jun 858%Oct 859%Oct 859%clearmostly clearmostly cloudyovercastpartly cloudy
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 Yakima Air Terminal Airport varies significantly throughout the year.

The wetter season lasts 5.4 months, from October 19 to March 31, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 36% on December 1.

The drier season lasts 6.6 months, from March 31 to October 19. The smallest chance of a wet day is 4% on August 5.

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 Yakima Air Terminal Airport changes throughout the year.

Rain alone is the most common for 11 months, from January 4 to December 19. The highest chance of a day with rain alone is 30% on November 9.

Snow alone is the most common for 2.3 weeks, from December 19 to January 4. The highest chance of a day with snow alone is 13% on December 28.

Daily Chance of Precipitation

Daily Chance of Precipitation at Yakima Air Terminal AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 136%Dec 136%Aug 54%Aug 54%Jan 432%Jan 432%Oct 1920%Oct 1920%Mar 3120%Mar 3120%rainsnowmixed
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. Yakima Air Terminal Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.0 months, from September 19 to June 17, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 20, with an average total accumulation of 2.2 inches.

The rainless period of the year lasts for 3.0 months, from June 17 to September 19. The least rain falls around August 5, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

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. Yakima Air Terminal Airport experiences significant seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.3 months, from November 1 to March 11, 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 1.0 inches.

The snowless period of the year lasts for 7.7 months, from March 11 to November 1. The least snow falls around July 5, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Yakima Air Terminal AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 inDec 301.0 inDec 301.0 inJul 50.0 inJul 50.0 inNov 10.1 inNov 10.1 inMar 110.1 inMar 110.1 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 Yakima Air Terminal Airport varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 34 minutes of daylight; the longest day is June 21, with 15 hours, 50 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 50 minJun 2115 hr, 50 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 228 hr, 34 minDec 218 hr, 34 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 5:08 AM on June 15, and the latest sunrise is 2 hours, 39 minutes later at 7:47 AM on November 3. The earliest sunset is at 4:14 PM on December 11, and the latest sunset is 4 hours, 45 minutes later at 8:59 PM on June 26.

Daylight saving time (DST) is observed at Yakima Air Terminal 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

Sunrise & Sunset with Twilight and Daylight Saving Time at Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:08 AMJun 155:08 AM8:59 PMJun 268:59 PMJun 26Dec 114:14 PMDec 114:14 PM7:47 AMNov 37:47 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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 Yakima Air Terminal 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 Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 80%Jan 80%Aug 20%Aug 20%drydry
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 Yakima Air Terminal Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from February 18 to August 12, with average wind speeds of more than 6.5 miles per hour. The windiest day of the year is March 29, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 6.2 months, from August 12 to February 18. The calmest day of the year is December 20, with an average hourly wind speed of 5.8 miles per hour.

Average Wind Speed

Average Wind Speed at Yakima Air Terminal AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mph12 mphMar 297.2 mphMar 297.2 mphDec 205.8 mphDec 205.8 mphFeb 186.5 mphFeb 186.5 mphAug 126.5 mphAug 126.5 mph
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 Yakima Air Terminal Airport is from the west throughout the year.

Wind Direction

Wind Direction at Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnorthsoutheast
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).

Best Time of Year to Visit

To characterize how pleasant the weather is at Yakima Air Terminal 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 Yakima Air Terminal Airport for general outdoor tourist activities is from early July to mid August, with a peak score in the last week of July.

Tourism Score

Tourism Score at Yakima Air Terminal Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.17.10.00.0precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Yakima Air Terminal Airport for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score at Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec02468104.44.40.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
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 Yakima Air Terminal Airport typically lasts for 5.0 months (154 days), from around May 5 to around October 5, rarely starting before April 13 or after May 24, and rarely ending before September 18 or after October 26.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Yakima Air Terminal Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 550%May 550%Oct 550%Oct 550%May 2490%May 2490%Sep 1890%Sep 1890%Apr 1310%Apr 1310%Oct 2610%Oct 2610%0%Feb 90%Feb 9Jul 27100%Jul 27100%freezingvery coldcoldcoolcomfortablewarmhotfrigid
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 Yakima Air Terminal Airport should appear around April 8, only rarely appearing before March 27 or after April 21.

Growing Degree Days

Growing Degree Days at Yakima Air Terminal AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°FApr 890°FApr 890°FJun 25900°FJun 25900°FAug 61,800°FAug 61,800°FDec 312,842°FDec 312,842°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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.2 months, from May 13 to August 21, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is July 13, with an average of 7.8 kWh.

The darker period of the year lasts for 3.7 months, from October 27 to February 17, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest day of the year is December 26, with an average of 1.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Yakima Air Terminal AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 137.8 kWhJul 137.8 kWhDec 261.2 kWhDec 261.2 kWhMay 136.5 kWhMay 136.5 kWhAug 216.5 kWhAug 216.5 kWhOct 272.5 kWhOct 272.5 kWhFeb 172.5 kWhFeb 172.5 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 Yakima Air Terminal Airport are 46.568 deg latitude, -120.544 deg longitude, and 1,119 ft elevation.

The topography within 2 miles of Yakima Air Terminal Airport contains only modest variations in elevation, with a maximum elevation change of 377 feet and an average elevation above sea level of 1,091 feet. Within 10 miles contains only modest variations in elevation (2,149 feet). Within 50 miles contains large variations in elevation (7,753 feet).

The area within 2 miles of Yakima Air Terminal Airport is covered by artificial surfaces (52%) and cropland (41%), within 10 miles by cropland (47%) and shrubs (35%), and within 50 miles by shrubs (57%) and trees (23%).

Data Sources

This report illustrates the typical weather at Yakima Air Terminal 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

Yakima Air Terminal 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 Bowers Field, Pangborn Field, Hanford, Stampede Pass, The Dalles Municipal Airport, Ephrata Municipal Airport, Grant County International Airport, and Tri-Cities 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.