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Want to revist 2024? Here's our year-end climate summary!

Our annual climate summary for Portland has been posted. Additional summaries for Astoria, Eugene, and Salem are available. For other climate summaries, visit our Observed Weather tab on our climate page. Read More >

Portland, OR

Weather Forecast Office

ClimateBookPortland

Weather.gov > Portland, OR > ClimateBookPortland

Historical Climate Data for Portland, Oregon

Date of most recent update:   5 January 2024

Want your own copy? 
Download the entire Portland Climate Book (151 pages, pdf file)

Portland Station Background Data and History

 

Portland (Airport and Downtown) Temperature Data
Period of Record: Downtown Data 1871-Dec 2023, Airport Oct 1940-Dec 2023
  1. Monthly Extremes and Normals
  2. Daily Normals and Records:
    Jan-Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
     
  3. Temperature Frequency Tables
  4. Days Per Month/Year of Highs/Lows of 90, 80, and 32 degrees
  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/Year/Seasons: Airport or Downtown
  10. Top 10 Warmest/Coldest Days and Nights
  11. Largest/Smallest Daily Temperature Climbs (from morning low to afternoon high)
  12. Largest/Smallest Daily Day to Day MAX Temperature Change
  13. MAX/MIN Temperature departures from Normal: Extremes and streaks
  14. Extreme MAX/MIN Temperatures: Downtown or Airport
  15. First/Last Days to reach 70, 80, 90 and 100 deg :Downtown or Airport
  16. Heating Degree Days by season/month
  17. Cooling Degree Days by season/month
  18. Freeze Data, with First/Last Freeze Dates Downtown or Airport
  19. Julian Day Converter with Leap Years

 

Portland (Airport and Downtown) Precipitation Data
Period of Record: Downtown Data 1871-Dec 2023, Airport Oct 1940-Dec 2023
  1. Overview of Monthly Rainfall Averages and Extremes 
  2. Daily Normals and Records:
    Jan to Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

  3. Monthly and Annual Total Rainfall Downtown or Airport
  4. Wettest/Driest 5 Months/Years/Seasons
  5. Water Year Totals & Normals 
  6. Short Term Rainfall Records 
  7. 24-Hour Rainfall Records 
  8. Top 10 Wettest days
  9. Most, Least and Average Days per Month with 0.01, 0.10, 0.50, 1.00 inch of rain
  10. Rainy Day Streaks with Trace, 0.01, 0.10, and 0.25, 0.50, 1, and 2 inches of rain
  11. Consecutive Days each month with 0.01, 0.10, and 0.25 inch of rain 
  12. Average Days per month with No Rain
  13. Consecutive Days each month with No Rain
  14. Days each month with No Rain, Trace, and Rain: Airport or Downtown
  15. Daily Frequency of Receiving Measurable Rainfall
  16. Monthly and Seasonal Snowfall for Airport or Downtown
  17. Short Term Snowfall Records and Snowiest Days
  18. First and Last Snow of the Season
  19. Days/Months with Measurable Snowfall
  20. Consecutive Days with Snow
  21. Snow on Christmas Day
  22. Daily Frequency of Measurable Snow

 

Portland Fog, Pressure, Wind and Weather
  1. Overview of Extreme Pressure and Wind
  2. Barometric Pressure: Normal and Extremes
  3. Wind: Normal and Extremes
  4. Wind: Strongest Sustained and Gusts
  5. Wind: Frequency of Direction, based on time of day
  6. Wind: Frequency of Speed, based on direction/time of day
  7. Wind: Monthly Wind Roses
  8. Wind: Direction as compared to Weather Conditions
  9. Frequency of Weather Conditions
  10. Days with Fog, Thunderstorms and Smoke
  11. Hourly Relative Humidity Curves, by month
  12. Hourly Dew Point Temperature Curves, by month
  13. Days per Month: Clear, Partly Cloudy, Cloudy
  14. Sky Cover Frequency
  15. Rose Festival Grand Floral Parade Weather History
  16. Holiday Weather Averages/Extremes: AIRPORT or DOWNTOWN
  17. Condensed Climate Normals and Extremes

 

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