Portland, Oregon, United States climate

Average temperatures, precipitation and all-time records for Portland, Oregon, United States, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is August, averaging a high of 83°F, and its coldest is December, with an average low of 33°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

How today compares

Latest recorded day: 2026-07-21. Each reading placed on Portland, Oregon, United States's own ±7-day seasonal distribution.

High 100°F Very High · 99th pct

Low 65°F Near Record · 99th pct

Feels-like 100°F High · 84th pct

Humidity 15.4 g/m³ Very High · 97th pct

Wind 11 mph Very High · 98th pct

Precip 0.00 in Dry

Open Portland in the live weather grader →

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 1981–2026 records. The wettest month is January (0.30 in on an average day).

Month	Avg high	Avg low	Avg precip
January	44°F	33°F	0.30 in
February	47°F	34°F	0.30 in
March	52°F	37°F	0.20 in
April	56°F	39°F	0.20 in
May	63°F	44°F	0.10 in
June	68°F	48°F	0.10 in
July	79°F	53°F	0.00 in
August	83°F	55°F	0.00 in
September	76°F	51°F	0.10 in
October	63°F	44°F	0.20 in
November	50°F	38°F	0.30 in
December	43°F	33°F	0.30 in

Jan 25°–51°

Feb 27°–55°

Mar 31°–61°

Apr 33°–67°

May 38°–75°

Jun 44°–78°

Jul 48°–90°

Aug 50°–94°

Sep 45°–88°

Oct 38°–75°

Nov 29°–58°

Dec 26°–52°

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: 114°F on 2021-06-28
Coldest day on record: -2°F on 1989-02-03

All Portland weather records →

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 →