Average Weather in Tanner Washington, United States
In Tanner, the summers are short, comfortable, and partly cloudy and the winters are long, very cold, wet, and overcast. Over the course of the year, the temperature typically varies from 34°F to 78°F and is rarely below 23°F or above 89°F.
Based on the tourism score, the best time of year to visit Tanner for warm-weather activities is from mid July to late August.
The warm season lasts for 2.8 months, from June 22 to September 16, with an average daily high temperature above 70°F. The hottest day of the year is August 3, with an average high of 78°F and low of 59°F.
The cool season lasts for 3.7 months, from November 12 to March 3, with an average daily high temperature below 49°F. The coldest day of the year is January 1, with an average low of 34°F and high of 42°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 Tanner, 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 in Tanner begins around June 22 and lasts for 3.4 months, ending around October 3. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
The cloudier part of the year begins around October 3 and lasts for 8.6 months, ending around June 22. On November 29, the cloudiest day of the year, the sky is overcast or mostly cloudy 79% of the time, and clear, mostly clear, or partly cloudy 21% 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 in Tanner varies very significantly throughout the year.
The wetter season lasts 7.9 months, from October 6 to June 4, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 61% on November 18.
The drier season lasts 4.1 months, from June 4 to October 6. The smallest chance of a wet day is 9% 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 throughout the year is rain alone, with a peak probability of 59% on November 18.
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. Tanner experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Tanner. The most rain falls during the 31 days centered around November 21, with an average total accumulation of 9.8 inches.
The least rain falls around July 30, with an average total accumulation of 0.8 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. Tanner experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.5 months, from November 18 to March 1, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 5, with an average total liquid-equivalent accumulation of 0.5 inches.
The snowless period of the year lasts for 8.6 months, from March 1 to November 18. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Tanner varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 27 minutes of daylight; the longest day is June 21, with 15 hours, 58 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:09 AM on June 16, and the latest sunrise is 2 hours, 46 minutes later at 7:54 AM on December 31. The earliest sunset is at 4:15 PM on December 11, and the latest sunset is 4 hours, 52 minutes later at 9:08 PM on June 25.
Daylight saving time (DST) is observed in Tanner 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 in Tanner, 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 in Tanner experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.1 months, from October 25 to March 30, with average wind speeds of more than 4.2 miles per hour. The windiest day of the year is December 29, with an average hourly wind speed of 5.5 miles per hour.
The calmer time of year lasts for 6.9 months, from March 30 to October 25. The calmest day of the year is August 9, with an average hourly wind speed of 2.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Tanner varies throughout the year.
The wind is most often from the south for 3.9 weeks, from March 2 to March 29 and for 1.4 months, from October 19 to December 1, with a peak percentage of 41% on November 10. The wind is most often from the west for 5.9 months, from March 29 to September 25, with a peak percentage of 60% on June 20. The wind is most often from the east for 3.4 weeks, from September 25 to October 19 and for 3.0 months, from December 1 to March 2, with a peak percentage of 34% on October 18.
Tanner 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 3.1 months, from June 26 to September 29, with an average temperature above 54°F. The day of the year with the warmest water is August 20, with an average temperature of 56°F.
The time of year with cooler water lasts for 4.0 months, from December 11 to April 11, with an average temperature below 48°F. The day of the year with the coolest water is February 11, with an average temperature of 46°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Tanner 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 Tanner for general outdoor tourist activities is from mid July to late 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 Tanner 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 Tanner typically lasts for 7.6 months (233 days), from around March 26 to around November 14, rarely starting before February 23 or after April 18, and rarely ending before October 25 or after December 9.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Tanner should appear around April 29, only rarely appearing before April 14 or after May 16.
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 3.0 months, from May 24 to August 22, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is July 21, with an average of 6.8 kWh.
The darker period of the year lasts for 3.8 months, from October 24 to February 19, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest day of the year is December 24, with an average of 0.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Tanner are 47.475 deg latitude, -121.746 deg longitude, and 840 ft elevation.
The topography within 2 miles of Tanner contains large variations in elevation, with a maximum elevation change of 3,087 feet and an average elevation above sea level of 778 feet. Within 10 miles contains large variations in elevation (5,374 feet). Within 50 miles also contains extreme variations in elevation (14,360 feet).
The area within 2 miles of Tanner is covered by trees (77%) and shrubs (14%), within 10 miles by trees (73%) and shrubs (23%), and within 50 miles by trees (55%) and shrubs (17%).
This report illustrates the typical weather in Tanner, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Tanner.
For each station, the records are corrected for the elevation difference between that station and Tanner 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 Tanner is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tanner and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .