Average Weather in October in Snoqualmie Washington, United States
Daily high temperatures decrease by 11°F, from 66°F to 55°F, rarely falling below 48°F or exceeding 76°F.
Daily low temperatures decrease by 7°F, from 51°F to 44°F, rarely falling below 36°F or exceeding 57°F.
For reference, on August 3, the hottest day of the year, temperatures in Snoqualmie typically range from 59°F to 77°F, while on December 23, the coldest day of the year, they range from 35°F to 43°F.
Average High and Low Temperature in October
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, 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 October
The month of October in Snoqualmie experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 53% to 72%.
The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on November 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.
Cloud Cover Categories in October
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Snoqualmie, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 32% and ending it at 54%.
For reference, the year's highest daily chance of a wet day is 62% on November 18, and its lowest chance is 10% on August 6.
Probability of Precipitation in October
The average sliding 31-day rainfall during October in Snoqualmie is very rapidly increasing, starting the month at 3.7 inches, when it rarely exceeds 6.9 inches or falls below 1.0 inches, and ending the month at 8.2 inches, when it rarely exceeds 12.5 inches or falls below 3.7 inches.
Average Monthly Rainfall in October
Over the course of October in Snoqualmie, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 39 minutes, implying an average daily decrease of 3 minutes, 17 seconds, and weekly decrease of 22 minutes, 60 seconds.
The shortest day of the month is October 31, with 10 hours, 1 minute of daylight and the longest day is October 1, with 11 hours, 40 minutes of daylight.
Hours of Daylight and Twilight in October
The earliest sunrise of the month in Snoqualmie is 7:06 AM on October 1 and the latest sunrise is 43 minutes later at 7:49 AM on October 31.
The latest sunset is 6:46 PM on October 1 and the earliest sunset is 55 minutes earlier at 5:51 PM on October 31.
Daylight saving time is observed in Snoqualmie during 2018, but it neither starts nor ends during October, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:09 AM and sets 15 hours, 59 minutes later, at 9:08 PM, while on December 21, the shortest day of the year, it rises at 7:52 AM and sets 8 hours, 26 minutes later, at 4:18 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in October
The chance that a given day will be muggy in Snoqualmie is essentially constant during October, remaining around 0% throughout.
For reference, on July 29, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in October
The average hourly wind speed in Snoqualmie is gradually increasing during October, increasing from 3.6 miles per hour to 4.5 miles per hour over the course of the month.
For reference, on December 29, the windiest day of the year, the daily average wind speed is 5.6 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 2.9 miles per hour.
Average Wind Speed in October
Wind Direction in October
Snoqualmie 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 surface water temperature in Snoqualmie is gradually decreasing during October, falling by 3°F, from 54°F to 52°F, over the course of the month.
Average Water Temperature in October
The growing season in Snoqualmie typically lasts for 8.1 months (250 days), from around March 12 to around November 17, rarely starting before February 15 or after April 6, and rarely ending before October 28 or after December 16.
The month of October in Snoqualmie is more likely than not fully within the growing season, with the chance that a given day is in the growing season decreasing from 100% to 85% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in October
The average accumulated growing degree days in Snoqualmie are gradually increasing during October, increasing by 128°F, from 1,883°F to 2,011°F, over the course of the month.
Growing Degree Days in October
The average daily incident shortwave solar energy in Snoqualmie is rapidly decreasing during October, falling by 1.7 kWh, from 3.4 kWh to 1.7 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in October
For the purposes of this report, the geographical coordinates of Snoqualmie are 47.529 deg latitude, -121.825 deg longitude, and 627 ft elevation.
The topography within 2 miles of Snoqualmie contains very significant variations in elevation, with a maximum elevation change of 1,404 feet and an average elevation above sea level of 555 feet. Within 10 miles contains very significant variations in elevation (4,849 feet). Within 50 miles also contains extreme variations in elevation (14,383 feet).
The area within 2 miles of Snoqualmie is covered by trees (77%) and artificial surfaces (19%), within 10 miles by trees (74%) and shrubs (17%), and within 50 miles by trees (55%) and shrubs (16%).
This report illustrates the typical weather in Snoqualmie year round, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Snoqualmie.
For each station, the records are corrected for the elevation difference between that station and Snoqualmie 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 Snoqualmie is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Snoqualmie and a given station.
The stations contributing to this reconstruction are: Renton Municipal Airport (59%, 29 kilometers, west); Stampede Pass (10%, 46 kilometers, southeast); and Snohomish County Airport (Paine Field) (30%, 54 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .