Weather In Seattle Washington: Climate And Average Temperature
Weather in Seattle is very changeable and mostly determined by its location in Washington state. The average yearly temperature ranges from 36 to 55 degrees Fahrenheit, with the warmest months being July and August and the coldest months being December and January.
What’s The Weather Like In Seattle All Year Round?
Summers in Seattle, Washington, United States are short, warm, dry, and partially overcast, whereas winters are extremely cold, rainy, and generally cloudy. Throughout the year, the temperature normally ranges from 37°F to 79°F, with temperatures seldom falling below 28°F or rising over 88°F. The greatest time of year to visit Seattle for warm-weather activities, according to the tourist score, is from early July to late August.
Seattle’s Average Temperature
From June 21 to September 13, the warm season lasts 2.8 months, with an average daily high temperature exceeding 72°F. August is the warmest month in Seattle, with average highs of 77°F and lows of 58°F.
From November 12 to March 1, the chilly season lasts 3.6 months, with an average daily high temperature of less than 53°F. December is the coldest month in Seattle, with an average low of 38°F and high of 47°F.
Clouds
The average proportion of the sky covered by clouds in Seattle varies significantly seasonally throughout the year. In Seattle, the clearer season starts about June 13 and lasts for 3.8 months, finishing around October 8.
August is the clearest month in Seattle, with the sky being clear, mostly clear, or partly overcast 70% of the time. The cloudier season starts about October 8 and lasts 8.2 months, ending around June 13.
In Seattle, January is the cloudiest month of the year, with the sky overcast or mostly cloudy 71% of the time.
Rainfall
We display the rainfall gathered over a sliding 31-day period centered on each day of the year to highlight variance between the months rather than simply the monthly totals. Monthly rainfall in Seattle varies greatly seasonally.
Seattle receives rain throughout the year. November is the wettest month in Seattle, with an average rainfall of 7.5 inches. July has the least rain in Seattle, with an average rainfall of 0.7 inches.
Snowfall
We evaluate snowfall collected over a sliding 31-day period centered on each day of the year, same as we do rainfall. The amount of snowfall in Seattle varies seasonally.
From December 12 to January 20, the snowy season lasts 1.3 months, with a typical 31-day snowfall of at least 1.0 inch. January has the most snow in Seattle, with an average snowfall of 1.2 inches.
The snowless season lasts 11 months, from January 20 to December 12. The least amount of snow occurs around July 1, with a total accumulation of 0.0 inches.
Sun
The duration of the day in Seattle varies greatly throughout the year. The shortest day in 2023 is December 21, when there are 8 hours, 26 minutes of daylight; the longest day is June 21, when there are 15 hours, 59 minutes of daylight.
The earliest dawn is at 5:10 a.m. on June 16, while the latest sunrise is at 7:57 a.m. on November 4. The earliest sunset occurs at 4:17 PM on December 11, while the latest sunset occurs at 9:11 PM on June 26. Daylight saving time (DST) is observed in Seattle in 2023, beginning on March 12, lasting 7.8 months, and ending on November 5.
Moon
The graph below provides a concise overview of crucial lunar data for 2023. The horizontal axis represents the day, the vertical axis represents the hour, and the colorful sections represent when the moon is over the horizon. The vertical gray bars (for new Moons) and blue bars (for full Moons) represent important Moon phases.
Humidity
The humidity comfort level is determined by the dew point, which influences whether sweat evaporates from the skin, cooling the body. Higher dew points seem dryer, whereas lower dew points feel drier. Unlike temperature, which fluctuates dramatically between night and day, dew point changes more slowly, thus although the temperature may decrease at night, a humid day is usually followed by a muggy night.
The perceived humidity level in Seattle, as defined by the proportion of time when the humidity comfort level is muggy, oppressive, or terrible, does not change greatly throughout the year, maintaining almost constant at 0%.
Wind
This section describes the hourly average wind vector (speed and direction) at 10 meters above ground for a vast region. The wind at any one site is heavily influenced by local terrain and other variables, and immediate wind speed and direction change more than hourly averages. The average hourly wind speed in Seattle varies somewhat seasonally throughout the year.
From October 15 to April 24, the windier season lasts 6.3 months, with average wind speeds of greater than 4.1 miles per hour. December is the windiest month in Seattle, with an average hourly wind speed of 5.1 miles per hour.
The calmer season lasts 5.7 months, from April 24 to October 15. July is the calmest month in Seattle, with an average hourly wind speed of 2.9 miles per hour.
For 2.6 months, from July 3 to September 20, the wind is mostly from the north, with a high proportion of 46% on July 30. For 9.5 months, from September 20 to July 3, the wind is mostly from the south, with a high proportion of 57% on January 1.
Temperature of the Water
Seattle is next to a vast body of water (e.g., ocean, sea, or large lake). This section provides information about the water’s wide-area average surface temperature. Over the course of the year, the average water temperature varies seasonally.
Warmer water is available for 3.1 months of the year, from June 24 to September 28, with an average temperature over 54°F. The hottest month of the year in Seattle is August, with an average temperature of 56°F.
The colder water season lasts 4.0 months, from December 10 to April 11, with an average temperature of less than 48°F. The month with the coldest water in Seattle is February, with an average temperature of 46°F.
Why You Should go to Seattle
The greatest time to visit or study in Seattle, WA is between June and September, when the weather is hottest and driest. More precisely, the months of July and August are the driest and sunniest in Seattle. In July, the average rainfall is 0.93 inches, while in August, it is 1.16 inches. However, since these are peak tourist months, hotel and airfare rates will be at their maximum.
The cheapest months to travel to Seattle are typically the winter months of December through February. However, lodging expenses might stay high during the off-season since hotels anticipate family and friends to visit. ceremony.
As a result, if you want to save money on flights and accommodations, consider visiting Seattle during the shoulder seasons of March, April, and October.
The winter months of December through February are often the least crowded in Seattle. Of course, this is also the season when flights and lodging are reasonably inexpensive.
If you’re visiting Seattle for the nightlife, parties, and festivals, you’ll probably appreciate the lively metropolitan atmosphere and should travel in the summer.
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