Port Townsend weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Port Townsend in September. Check more long-term weather averages for Port Townsend in September before you book your next holiday to Washington State in 2025/2026.

  • 20°C maximum daytime temperature in September in Port Townsend20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Port Townsend9
    9 days with some rainfall
  • 10°C minimum night-time temperature in September in Port Townsend10
    10°C 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
  • 34 mm monthly rainfall in September in Port Townsend34
    34 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Port Townsend5
    5 (Moderate) UV index
  • 12°C sea temperature in September in Port Townsend12
    12°C sea temperature

More about Port Townsend

Port Townsend by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Washington State

Virgin Holidays: Book early for 2025 holidays

  • Book early & save on Virgin Holidays in 2025
  • Destinations include the USA, Caribbean & beyond
  • Ideal for family beach holidays, city breaks & more
Go to Virgin Holidays deal >>

View all Virgin Holidays offers

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 / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

How hot is it in Port Townsend in September?

Daytime temperatures usually reach 20°C in Port Townsend in September, falling to 10°C 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 12°C.

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 34mm.

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^