Portland, Oregon, United States climate
Average temperatures, precipitation and all-time records for Portland, Oregon, United States, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 84°F, and its coldest is December, with an average low of 36°F.
Portland is the most populous city in the U.S. state of Oregon. Located in the Pacific Northwest at the confluence of the Willamette and Columbia rivers, it is the 28th-most populous city in the United States, sixth-most populous on the West Coast, and fourth-most populous in the Pacific Northwest,… via Wikipedia
Notable weather in Portland
In the June 2021 heat dome, Portland reached an all-time record 116°F across three consecutive record-shattering days. Read more →
Portland average temperatures by month
Typical daily high and low, and average precipitation, for each month in Portland, Oregon, United States, based on 1980–2026 records. The wettest month is January (0.20 in on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 47°F | 36°F | 0.20 in |
| February | 51°F | 37°F | 0.20 in |
| March | 57°F | 40°F | 0.20 in |
| April | 62°F | 43°F | 0.20 in |
| May | 69°F | 47°F | 0.10 in |
| June | 73°F | 51°F | 0.10 in |
| July | 83°F | 56°F | 0.00 in |
| August | 84°F | 57°F | 0.00 in |
| September | 77°F | 53°F | 0.10 in |
| October | 65°F | 46°F | 0.10 in |
| November | 52°F | 41°F | 0.20 in |
| December | 46°F | 36°F | 0.20 in |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.
Thinking of visiting Portland?
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Record extremes
- Hottest day on record: 117°F on 2021-06-29
- Coldest day on record: -1°F on 1989-02-05
Percentiles compare each day to Portland, Oregon, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →