The wetter season lasts 6.6 months, from October 9 to April 29, with a greater than 33% chance of a given day being a wet day. MERRA-2 Modern-Era Retrospective Analysis. To characterize how pleasant the weather is in Seattle throughout the year, we compute two travel scores. Copyright © 2020 Current Results Publishing Ltd. Based on the tourism score, the best time of year to visit Seattle for warm-weather activities is from early July to late August. Winters in Seattle have an average temperature of aounrd 5 to 8 degrees Celsius (41-46° Fahrenheit), so snowfall is rare. The graph below shows the daily range of temperatures for each month. Months with the highest UV index are June and July (UV index 7). The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. 2016. The time of year with cooler water lasts for 4.0 months, from December 9 to April 10, with an average temperature below 48°F. The temperatures are mildly warmer and more pleasant in the range of 41°F (5°C) and 57.2°F (14°C), and there is a further drop in relative humidity to 70.8%. The hottest day of the year is July 31, with an average high of 79°F and low of 59°F. 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. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. Seattle Weather Forecasts. A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy. Temperatures are the most pleasant in the range of 55.4°F (13°C), and 73.4°F (23°C) and touring. The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. To fill in the rest, there's information on how many days a month get above or below a given temperature. Seattle experienes warm summers and mild winters. The windier part of the year lasts for 6.3 months, from October 14 to April 23, with average wind speeds of more than 4.1 miles per hour. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. The sliding 31-day liquid-equivalent quantity of snowfall in Seattle does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout. 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). The percentage of time spent at various humidity comfort levels, categorized by dew point. The mean monthly relative humidity over the year, The mean monthly wind speed over the year (in meters per second). The month with the lowest relative humidity is July (65.4%). Average monthly temperatures in Seattle (degrees centigrade and fahrenheit) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec °C: 7.2: 9.9: 11.7: 14.1: 17.8: 20.9: 23.5 Weather Atlas: Seattle, WA - Detailed climate information and monthly weather forecast. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Seattle area. The average annual percentage of humidity is: 76.0%. Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. support@__remove_this_part__weatherspark.com. Seattle, the largest city in the Washington State, has a warm, temperate oceanic climate (Köppen climatic classification Cfb) characterized by cool, wet winters and mild, relatively dry summers. Daylight saving time (DST) is observed in Seattle during 2020, starting in the spring on March 8, lasting 7.8 months, and ending in the fall on November 1. Owing to its geographical location in the Puget Sound area. Mesa Verde is not for summer visitors only. In 2020, the shortest day is December 21, with 8 hours, 26 minutes of daylight; the longest day is June 20, with 15 hours, 59 minutes of daylight. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. December is the most wet month. The calmer time of year lasts for 5.7 months, from April 23 to October 14. Months with the highest snowfall are February and December (43.2mm). The figure below presents a compact representation of key lunar data for 2020. Throughout the year, in Seattle, Washington, there are. The predominant average hourly wind direction in Seattle varies throughout the year. This is a highlight of your trip and something you must add to the bucket list. Most rain in Seattle is seen in winter and on an annual base the city experiences a large amount of rainfall making it one of the wettest cities in the country. The darker period of the year lasts for 3.8 months, from October 25 to February 18, with an average daily incident shortwave energy per square meter below 2.1 kWh.
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