All-time Record Hottest and Coldest Temperatures Ever Recorded in Seattle, Washington

Official weather records have been kept in Seattle, Washington since 1948. These are the all-time record hottest and coldest temperatures ever recorded in Seattle since 1948.

Due to its location near the Puget Sound, and its location to the Pacific Ocean, the city of Seattle has a much more milder climate than does most of the rest of the state of Washington. This is born out in spades by the differences between the all-time hottest and coldest temperatures in Seattle, compared to the all-time hottest and coldest temperatures in Washington.

The difference between the record hottest and coldest temperatures in Seattle is 103 degrees. The difference between the record hottest and coldest temperatures in the state of Washington is 166 degrees; a huge difference of 63 degrees.

All-time Record Hottest and Coldest Temperatures Ever Recorded in Seattle, Washington

The All-time Hottest Temperature Ever Recorded in Seattle is 103 Degrees

The hottest temperature ever recorded in Seattle is 103 degrees, which occurred on July 29, 2009. Days when the temperature reaches 100 degrees are extremely rare in Seattle, as the city has only had two dates since 1948 when the temperature reached or exceeded 100. In addition to the record 103 degree day, it was also 100 degrees in Seattle on July 20, 1994.

I've been to Seattle a number of times, one of my uncles lives there, and another reason I think it does not get too hot in the city is because of the lack of sunshine. On a yearly basis, the sun only shines 43% of the time that it could possibly shine in Seattle.

• All-time Hottest Temperature Ever Recorded in Washington is 118 degrees 

The hottest temperature ever recorded in the state of Washington is 118 degrees, which occurred on August 5, 1961, at the Ice Harbor Dam. The Ice Harbor Dam is located along the Snake River shortly before it enters the Columbia River in southeastern Washington.

If you are ever in that area and want to see a great natural wonder, head north for about 60 miles and see magnificent Palouse Falls, which drops 198 feet along the Palouse River shortly before it flows into the Snake River. For best water flow, visit Palouse Falls in the spring or early summer.

The difference between the all-time hottest temperature in Seattle (103) and the all-time hottest temperature in Washington (118) is 15 degrees. That is a big statistical difference.

The All-time Coldest Temperature Ever Recorded in Seattle is 0 Degrees

The coldest temperature ever recorded in Seattle is zero degrees, which occurred on January 31, 1950. 

While it has never been below zero degrees in Seattle, below freezing temperatures have occurred in the city in eight out of the 12 months of the year (October through May). Seattle averages 19 days a year when the minimum daily temperature is below freezing.

• All-time Coldest Temperature Ever Recorded in Washington is -48 Degrees

The coldest temperature ever recorded in the state of Washington is -48 degrees, which occurred on December 30, 1968, in both Winthrop and Mazama. The small towns of Winthrop and Mazama are located some 15 miles apart in the North Cascades Mountains in north-central Washington, about 100 miles as the crow flies northeast of Seattle.

The difference between the record coldest temperature in Seattle (0) and the record coldest temperature in Nevada (-48) is a whopping 48 degrees. A huge difference, which shows that the climate in Seattle is much milder than most of the rest of the state of Washington, especially inland areas away from the Pacific Ocean.