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Portland, Oregon
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Local Climate Data from Portland Airport

Local Climate Data from Portland Airport


......Created and updated by Clinton Rockey, NWS Portland
Data is current through 2012.

Updated files denoted by a new icon
Portland Station Background Data and History
  • Table of Contents (for those printing all pages)
  • Climatic Summary and Station History (text)
  • Rose Festival Grand Floral Parade Weather History
  • Condensed Climate Normals

  • Portland (Airport and Downtown) Temperature Data
    Downtown Data is 1871-December 2012, while Airport is 1941-December 2012)
    1. Monthly Extremes or Monthly Normals
    2. Daily Normals and Records, by Month:
      Jan-Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
    3. Days Per Month/Year of Highs/Lows of 90, 80, and 32 degrees
    4. Temperature Frequency Tables
    5. Heat Waves and Cold Snaps
    6. Monthly MAXIMUM Temperatures: Downtown or Airport
    7. Monthly MINIMUM Temperatures: Downtown or Airport
    8. Monthly MEAN Temperatures: Downtown or Airport
    9. Warmest/Coldest Months/Years
    10. Largest and Smallest Daily Temperature Swings
    11. Extreme MAX/MIN Temperatures: Downtown or Airport
    12. First/Last Days to reach 70, 80, 90 and 100 deg :Downtown or Airport
    13. Heating Degree Days by season/month
    14. Cooling Degree Days by season/month
    15. Freeze Data, with First/Last Freeze Dates Downtown or Airport
    16. Julian Day Converter with Leap Years

    Portland (Airport and Downtown) Precipitation Data
    Downtown Data is 1871-December 2012, while Airport is Oct 1940-December 2012)
    1. Graph of Monthly Rainfall or Monthly Extreme/Normals
    2. Daily Normals and Records, by Month:
      Jan & Feb | Mar & Apr | May & Jun | Jul & Aug | Sep & Oct | Nov & Dec
    3. Monthly/Annual Rainfall Totals: Downtown or Airport
    4. Wettest/Driest 5 Months/Years/Seasons
    5. Water Year Totals & Normals (Airport and Downtown)
    6. Short Term Rainfall Records (Airport only, 1953-2011)
    7. 24-Hour Rainfall Records (Airport and Downtown)
    8. Top 10 Wettest days (Downtown and Airport)
    9. Most, Least and Average Days in a Month with
      0.01, 0.10, 0.50, 1.00 inch of rain
      (Airport and Downtown)
    10. new iconRainy Day Streaks with Trace, 0.01, 0.10, and 0.25, 0.50, 1.00
      and 2.00 inches rain in a day: Downtown or Airport
    11. Consecutive Days each month with 0.01, 0.10, and 0.25 inch of
      rain: Downtown or Airport
    12. Average Days per month with No Rainfall: Downtown or Airport
    13. Consecutive Days each month with No Rainfall: Downtown or Airport
    14. Days each month with No Rain, Trace, and Rain: Downtown or Airport
    15. Daily Frequency and Probability or Receiving Measureable Rainfall,
      (at least 0.01 inch), and a graphical format: Downtown/Airport
    16. Monthly & Seasonal Snowfall: Downtown or Airport/NWS Office
    17. >Short Term Snowfall Records: Airport
    18. Days/Months with Measurable Snowfall (Airport)
    19. First and Last Snow of the Season (Airport & Downtown)
    20. Consecutive Days in Row with Snow (Airport & Downtown)
    21. >Snow on Christmas History (Airport & Downtown)
    22. Daily Frequency and Probability of Measurable Snow (Downtown)

    Portland Fog, Pressure, Wind and other Tidbits
    1. Atmospheric Pressure: Normal and Extremes
    2. By Month, Hourly Relative Humidity, by time of day
    3. Days in Month with Dense Fog and Foggy Streaks
    4. Wind: Normal and Extremes
    5. Wind: Frequency of Direction, based on time of day
    6. Wind: Frequency of Speed, based on direction and time of day
    7. Days per Month: Clear, Partly Cloudy, Cloudy
    8. Sky Cover Frequency: January through December
    9. Rose Festival Grand Floral Parade Weather History
    10. Condensed Climate Normals


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          Portland, OR 97230
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    Weather Line: 503.261-9246, -9247

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