These are the ten all-time hottest weather temperature days recorded in the city of Portland, Oregon. The temperature data for Portland dates back to 1874. Most people do not associate the city of Portland with hot weather, but it can get hot here.
The hottest temperature ever recorded in Portland, Oregon is 107 degrees, which first occurred on July 30, 1965. The hottest temperature ever recorded in the state of Oregon is 119 degrees, which occurred on August 10, 1898 in Pendleton.
One hundred degree weather days are not that uncommon in Portland. There have been 100 degree weather days in May, June, July, August and September. In addition, the months of April and October have had 90 degree weather temperature days.
The earliest date in any year since 1874 when Portland had a 100 degree weather temperature day was on May 28, 1983, and the latest 100 degree day in any year since 1874 was on September 7, 1981 when it was 100 degrees exactly.
10 All-Time Hottest Weather Temperature Days in Portland, Oregon
T-1. August 10, 1981 - 107 degrees
T-1. August 8, 1981 - 107 degrees
T-1. July 30, 1965 - 107 degrees
T-1. July 2, 1942 - 107 degrees
T-5. July 29, 2009 - 106 degrees
T-5. July 28, 2009 - 106 degrees
T-5. July 19, 1956 - 106 degrees
T-8. August 3, 2017 - 105 degrees
T-8. August 3, 2017 - 105 degrees
T-8. September 2, 1998 - 105 degrees
T-8. August 9, 1981 - 105 degrees
T-8. August 17, 1977 - 105 degrees
T-8. August 12, 1977 - 105 degrees
T-8. August 28, 1967 - 105 degrees
T-8. July 1, 1942 - 105 degrees
The data above is from both the Portland Airport station and the downtown weather station.
The hottest month of the year in Portland is August, which has an average daily mean temperature of 68.5 degrees, followed closely by July with an average daily mean temperature of 68.1 degrees. The next hottest month is September 63.6 degrees, followed by June at 62.7 degrees.
The annual average mean temperature in Portland is 53.5 degrees. The maximum annual mean temperature is 62.1 degrees, while the annual average minimum mean is 44.8 degrees.
Note: this article was originally published on Knoji but that site has not paid the author in over three years so he's republishing the updated article here on his own weather blog on May 24, 2017
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