Typical Weather in Portland, OR in September
75° F Avg High
55° F Avg Low
4 Rainy Days
☀️ Temperature Summary
September is a popular time of year to visit, with an inviting climate characterized by warm temperatures. Compared to other months, Portland experiences cooler conditions in September, with daytime highs averaging 75°F. You can expect overnight lows near 55°F most days. Temperatures will usually fall as the month goes on, with daily high temperatures ranging between 77°F and 68°F.
The warm, dry temperatures in September make Portland a great destination to relax and soak up the sun.
High Temps Throughout the Year
☔ Rain Summary
In September you can expect close to a 14% chance of rain for any given day. It rains less than usual in September, with total rainfall for the month typically near 2 inches.
Rainfall Throughout the Year
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