Average Weather in Deer Park Washington, United States
In Deer Park, the summers are short, warm, dry, and mostly clear and the winters are freezing and mostly cloudy. Over the course of the year, the temperature typically varies from 22°F to 87°F and is rarely below 7°F or above 96°F.
Based on the tourism score, the best time of year to visit Deer Park for warm-weather activities is from early July to mid August.
The hot season lasts for 2.8 months, from June 19 to September 13, with an average daily high temperature above 76°F. The hottest day of the year is August 3, with an average high of 87°F and low of 52°F.
The cold season lasts for 3.4 months, from November 14 to February 25, with an average daily high temperature below 43°F. The coldest day of the year is December 23, with an average low of 22°F and high of 32°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
In Deer Park, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Deer Park begins around June 5 and lasts for 4.2 months, ending around October 11. On August 1, 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 11 and lasts for 7.8 months, ending around June 5. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% 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 in Deer Park varies significantly throughout the year.
The wetter season lasts 7.7 months, from October 20 to June 12, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 38% on November 21.
The drier season lasts 4.3 months, from June 12 to October 20. The smallest chance of a wet day is 7% on August 3.
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 30% on November 10.
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. Deer Park experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from August 19 to July 31, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 19, with an average total accumulation of 2.3 inches.
The rainless period of the year lasts for 2.7 weeks, from July 31 to August 19. The least rain falls around August 9, with an average total accumulation of 0.5 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. Deer Park experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.7 months, from October 29 to March 19, 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 0.9 inches.
The snowless period of the year lasts for 7.3 months, from March 19 to October 29. The least snow falls around July 24, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Deer Park varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 23 minutes of daylight; the longest day is June 20, with 16 hours, 2 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:49 AM on June 16, and the latest sunrise is 2 hours, 50 minutes later at 7:39 AM on November 4. The earliest sunset is at 3:56 PM on December 11, and the latest sunset is 4 hours, 57 minutes later at 8:53 PM on June 25.
Daylight saving time (DST) is observed in Deer Park 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
The perceived humidity level in Deer Park, 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
Average Wind Speed
The predominant average hourly wind direction in Deer Park varies throughout the year.
The wind is most often from the south for 1.7 weeks, from January 11 to January 23; for 6.0 months, from February 22 to August 21; and for 3.2 months, from September 22 to December 28, with a peak percentage of 45% on November 10. The wind is most often from the east for 4.3 weeks, from January 23 to February 22 and for 2.0 weeks, from December 28 to January 11, with a peak percentage of 37% on January 31. The wind is most often from the west for 1.0 months, from August 21 to September 22, with a peak percentage of 37% on August 29.
Best Time of Year to Visit
To characterize how pleasant the weather is in Deer Park 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 Deer Park for general outdoor tourist activities is from early July to mid August, with a peak score in the first 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 Deer Park for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.
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 in Deer Park typically lasts for 4.5 months (139 days), from around May 10 to around September 25, rarely starting before April 21 or after May 27, and rarely ending before September 5 or after October 15.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Deer Park should appear around April 29, only rarely appearing before April 17 or after May 14.
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 3.2 months, from May 15 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 15, with an average of 7.5 kWh.
The darker period of the year lasts for 3.8 months, from October 26 to February 19, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest day of the year is December 26, with an average of 1.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Deer Park are 47.954 deg latitude, -117.477 deg longitude, and 2,152 ft elevation.
The topography within 2 miles of Deer Park contains only modest variations in elevation, with a maximum elevation change of 174 feet and an average elevation above sea level of 2,144 feet. Within 10 miles contains only modest variations in elevation (2,493 feet). Within 50 miles contains large variations in elevation (5,538 feet).
The area within 2 miles of Deer Park is covered by grassland (39%), shrubs (33%), and cropland (18%), within 10 miles by shrubs (45%) and sparse vegetation (17%), and within 50 miles by trees (35%) and shrubs (32%).
This report illustrates the typical weather in Deer Park, 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
There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Deer Park.
For each station, the records are corrected for the elevation difference between that station and Deer Park according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Deer Park is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Deer Park and a given station.
The stations contributing to this reconstruction are: Deer Park Airport (91%, 4.3 kilometers, northeast); Felts Field (4.7%, 32 kilometers, south); Fairchild Air Force Base (3.6%, 38 kilometers, south); and Omak Airport (0.4%, 162 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .