Historical Climate Data for Portland, Oregon
Date of most recent update: 5 January 2024
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Download the entire Portland Climate Book (151 pages, pdf file)
| Portland Station Background Data and History |
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Portland (Airport and Downtown) Precipitation Data
Period of Record: Downtown Data 1871-Dec 2023, Airport Oct 1940-Dec 2023 |
- Overview of Monthly Rainfall Averages and Extremes
- Daily Normals and Records:
Jan to Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
- Monthly and Annual Total Rainfall Downtown or Airport
- Wettest/Driest 5 Months/Years/Seasons
- Water Year Totals & Normals
- Short Term Rainfall Records
- 24-Hour Rainfall Records
- Top 10 Wettest days
- Most, Least and Average Days per Month with 0.01, 0.10, 0.50, 1.00 inch of rain
- Rainy Day Streaks with Trace, 0.01, 0.10, and 0.25, 0.50, 1, and 2 inches of rain
- Consecutive Days each month with 0.01, 0.10, and 0.25 inch of rain
- Average Days per month with No Rain
- Consecutive Days each month with No Rain
- Days each month with No Rain, Trace, and Rain: Airport or Downtown
- Daily Frequency of Receiving Measurable Rainfall
- Monthly and Seasonal Snowfall for Airport or Downtown
- Short Term Snowfall Records and Snowiest Days
- First and Last Snow of the Season
- Days/Months with Measurable Snowfall
- Consecutive Days with Snow
- Snow on Christmas Day
- Daily Frequency of Measurable Snow
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