Oregon Annual Rainfall and Climate Data, see below for individual cities 

 

Oregon city precipitation totals

City

Avg Annual Precip

Avg Annual Snow 

 Avg. days of Precip

Avg # thunderstorm days

 Avg # hail days Avg # severe thunderstorm watches per year Avg # tornado watches per year # of tornadoes reported in county, 1960-2010
Astoria 67.13 4.3 190 7 0 0 0 5
Burns 10.57 41.3 96 14 0 0 1 5
Eugene 50.90 6.4 137 5 0 0 0 5
Medford  18.37 7.3 101 9 1 0 0 0
Pendleton 12.76 17.0 98 10 0 0 2 5
Portland 37.07 6.5 151 7 1 0 0 3
Salem 40.00 6.6 146 5 0 0 0 8
Sexton Summit 33.18 97.8 126 6 0 0 0 0
  • Oregon Annual Precipitation Average - 27.55", 36th wettest in the U.S.
  • Oregon Tornado Average - 1.0 per year - 44th most in the U.S.
  • Largest reported Tornado in Oregon from 1950-2011, 6/11/1968 - 880 yards / .50 miles wide
  • Date with highest number of reported Tornadoes in Oregon from 1950-2011, September 15th - 5 tornadoes
  • Average time of occurrence of reported Tornadoes in Oregon from 1950-2011 - 2:38 pm
  • Oregon Annual Lightning Density - 0.6 flashes per square mile - 46th highest in U.S.
  • Record Driest year in Oregon from 1895-2012 - 1985, avg precipitation 18.81 inches 
  • Record Wettest year in Oregon from 1895-2012 - 1996, avg precipitation 39.68 inches 

Oregon Precipitation Records 

  • Driest location ranked by lowest annual average precipitation: Fields, southeastern Oregon, 6.55"
  • Wettest location ranked by highest annual average precipitation: Valsetz, northwestern Oregon, 127.71"
  • Snowiest location ranked by highest annual average snowfall: Crater Lake, southwestern Oregon, 529.9"
  • State precipitation record for 24 hours - Port Orford, southwestern Oregon, 11/19/1996, 11.65"
  • State precipitation record for 1 year - Laurel Mountain, northwestern Oregon, 1996, 204.12"
  • State snowfall record for 24 hours - Bonneville Dam, northwestern Oregon, 1/9/1980, 39.0"
  • State snow record for 1 season - Crater Lake, southwestern Oregon, 1949-1950, 903.0"
  • Astoria, Oregon is the third wettest city in the United States with an annual average of 69.60" inches while
    Burns, Oregon is one of the driest cities with only 10.57" average annual precipitation. 
  • The average annual rainfall in Oregon varies from as much as 200 inches at points along the upper west 
    slopes of the Coast Range to less than eight inches in Plateau regions

Oregon temperature averages and extremes, precipitation and temperature data for all U.S. states and Top 10 U.S. climate extremes
 Data sources: National Climatic Data Center, Severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center, Tornado climate data - NOAA Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala