Portland weather in September

Check the Weather in Portland, Oregon in September before you book your next holiday. This gives the best indication of the weather in September and includes figures for temperature, sunshine and rainfall.

  • 23°C maximum daytime temperature in September in Portland23
    23°C max day temperature
  • 8 hours of sunshine per day (64% of daylight hours) in September in Portland8
    8 hours of sunshine per day
  • 8 days with some rainfall in September in Portland8
    8 days with some rainfall
  • 9°C minimum night-time temperature in September in Portland9
    9°C min night temperature
  • 12 hours of daylight per day in September in Portland12
    12 hours of daylight per day
  • No heat & humidity in September in Portland0
    No heat & humidity
  • 47 mm monthly rainfall in September in Portland47
    47 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Portland5
    5 (Moderate) UV index

Metric (°C / mm)  |  Imperial (°F / inches)

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