U.S. record high temperatures heatwave 2021

Highest daily record temperatures in the Pacific Northwest region of the United States between June 24 and July 8, 2021, by weather station (in degrees Fahrenheit)

Characteristic	2021 daily record high	Previous daily record high	Year of previous daily record high
Dallesport Airport, June 28 (Washington)	118	103	2,008
Pendleton E Or Regional Airport (Oregon)	117	102	2,008
Arlington (Oregon)	117	105	1,987
Estacada 2 Se (Oregon)	117	102	2,008
Salem Airport Mcnary Field (Oregon)	117	101	2,008
Walla Walla Regional Airport (Washington)	116	105	2,008
Portland International Airport (Oregon)	116	100	2,008
Somes Bar California (California)	116	107	2,015
Pelton Dam (Oregon)	116	108	2,015
Troutdale (Oregon)	116	99	2,000
Ephrata Airport (Washington)	116	103	2,008
Red Bluff Municipal Airport (California)	115	113	2,020
Dallesport Airport, June 27 (Washington)	115	107	2,015
Medford International Airport (Oregon)	115	103	2,008
Odessa (Washington)	115	105	1,924
Pendleton Branch Experimental Station (Oregon)	115	101	2,003
China Lake Naf (California)	115	114	2,017

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Release date

December 2021

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Region

United States

Survey time period

June 24, 2021 to July 8, 2021

Supplementary notes

Figures are from daily measurements from June 24, 2021 to July 8, 2021.

Includes weather stations with a minimum of 30 years of data with more than 182 days complete each year.

Citation formats

The Dallesport Airport weather station in Washington state recorded the highest daily temperature in the U.S. Pacific Northwest region during the 2021 heatwave. This weather station reached record highs two days straight, on June 27 and June 28, at 115 and 118 degrees Fahrenheit, or some 46.1 and 47.8 degrees Celsius, respectively. Oregon topped off the ranking of leading five record highs by weather station, at 117 degrees Fahrenheit (some 47.2 degrees Celsius). These records were between two degrees and 17 degrees higher than previous records, with the Arlington, Oregon weather station having had the longest-standing previous daily record high.