Oregon Annual Temperatures and Extremes

City

Avg High Temp

Avg Low Temp 

Avg Annual Temp

 Avg # days > 90F Avg # days < 32F  Record High Temp Record Low Temp
Astoria 58.4 43.7 51.0 0 34 100 / 1961 6 / 1972
Burns 59.7 32.8 46.3 21 185 103 / 1946 -26 / 1962
Eugene 63.3 41.8 52.6 15 53 108 / 1981 -12 / 1972
Medford 67.2 41.2 54.2 53 80 115 / 1946 -6 / 1972
Pendleton 63.2 41.3 52.3 36 88 114 / 1928 -26 / 1930
Portland 62.4 44.7 53.6 11 40 107 / 1965 -3 / 1950
Salem 63.5 41.6 52.5 16 60 108 / 1941 -12 / 1972
Sexton Summit 56.1  40.0 48.1 3 103 97 / 1955 -4 / 1990
  • Oregon annual average temperature - 48.41 degrees, 33rd warmest state in the U.S.
  • Record Hottest year in Oregon - 1934 / Avg temperature 51.26 degrees
  • Record Coldest year in Oregon - 1916 / Avg temperature 45.58 degrees
  • Oregon average Summer temperature (June, July, August) 63.7 F degrees, 46th warmest U.S. summer state
  • Oregon average Winter temperature (December, January, February) 34.0 F degrees, 31st coldest U.S. winter state

Oregon's Temperature Records 

  • Hottest temperature ever recorded: 119 F, Pendleton, northeastern Oregon, 8/10/1898
  • Coldest temperature ever recorded: -54 F, Seneca, northeastern Oregon, 2/10/1933
  • Hottest location ranked by highest average annual temperature: Illahe, southwestern Oregon, 55.4 F
  • Coldest location ranked by lowest average annual temperature: Seneca, northeastern Oregon, 40.3 F
  • During February 1933, a major cold outbreak brought a surge of Arctic air into Oregon. The city of Seneca
    in northeast Oregon recorded the state's all-time record low temperature of -54 degrees F. The next day it 
    was nearly 100 degrees warmer when the high reached 45 degrees.
  • On July 16, 1946, the temperature at Medford, OR, reached a record high of 115 degrees to begin a two 
    week heat wave. During that Oregon heat wave, the temperature hit 100 degrees at Sexton Summit for the 
    only time in forty years of records.

Few states have greater temperature extremes than Oregon where they have ranged from a low of -54 degrees Fahrenheit (° F) to a high of 119° F. Seldom, however, do daily extremes occur even closely approaching these absolute records. Specifically for Portland, January averages 40 while the July average is 68° F. Temperatures of 90° F or greater occur about 13 days annually. In the inland valleys of the southwest the average summer temperatures are about five degrees higher than in the northwest and maximums of 90° F or higher occur 40 to 50 days a year. In south-central Oregon the median annual maximum temperatures are between 95 and 100; in most other areas east of the Cascades this variance is between 100 and 105° F. Median annual minimum temperatures for eastern Oregon vary from near zero Fahrenheit in the more protected areas of the Columbia Basin to nearly -30° F in the high mountain and plateau regions. The minima for majority of these stations, however, lie in -1 to -10° F range. The normal mean January temperature in southeast Oregon is 25 to 28 while in the northeast it is 29 to 33° F; July normal means range from 65 to 70 in the central valleys and plateau regions and 70 to 78° F along the eastern border.

 

Oregon precipitation averages and extremes, US Top 10 climate extremes, precipitation data for all U.S. states
Data source: National Climatic Data Center