Port Townsend weather in September 2025

Expect daytime maximum temperatures of 68°F in Port Townsend, Washington State in September based on long-term weather averages. There are 7 hours of sunshine per day on average.

  • 68°F maximum daytime temperature in September in Port Townsend68
    68°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Port Townsend9
    9 days with some rainfall
  • 50°F minimum night-time temperature in September in Port Townsend50
    50°F min night temperature
  • 13 hours of daylight per day in September in Port Townsend13
    13 hours of daylight per day
  • No heat & humidity in September in Port Townsend0
    No heat & humidity
  • 1.3 inches monthly rainfall in September in Port Townsend1.3
    1.3 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Port Townsend5
    5 (Moderate) UV index
  • 54°F sea temperature in September in Port Townsend54
    54°F sea temperature

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The September weather guide for Washington State (Port Townsend) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Port Townsend in September?

Daytime temperatures usually reach 68°F in Port Townsend in September, falling to 50°F at night.

How sunny is it in Port Townsend in September?

There are normally 7 hours of bright sunshine each day in Port Townsend in September - that's 55% of daylight hours.

How warm is the sea around Port Townsend in September?

The average sea temperature around Port Townsend in September is 54°F.

Does it rain in Port Townsend in September?

There are usually 9 days with some rain in Port Townsend in September and the average monthly rainfall is 1.3 inches.

Port Townsend September sunrise & sunset times

Browse the sunrise and sunset times for Port Townsend in September 2025. Select a month to view Port Townsend sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 18:51
Monday, 15th September 2025 05:49 18:22
Tuesday, 30th September 2025 06:09 17:51

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