Bellingham weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Bellingham in September. Check more long-term weather averages for Bellingham in September before you book your next holiday to Washington State in 2025/2026.

  • 19°C maximum daytime temperature in September in Bellingham19
    19°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in September in Bellingham10
    10 days with some rainfall
  • 9°C minimum night-time temperature in September in Bellingham9
    9°C min night temperature
  • 13 hours of daylight per day in September in Bellingham13
    13 hours of daylight per day
  • No heat & humidity in September in Bellingham0
    No heat & humidity
  • 67 mm monthly rainfall in September in Bellingham67
    67 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Bellingham5
    5 (Moderate) UV index
  • 12°C sea temperature in September in Bellingham12
    12°C sea temperature

More about Bellingham

Bellingham by month

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

Recommended for Washington State

Argus Car Hire: Compare low prices on car hire

  • Compare car hire with popular rental companies
  • Book with no credit card fees & free cancellation policy
  • Find low prices based on destination & travel dates
Go to Argus Car Hire deal >>

View all Argus Car Hire offers

The September weather guide for Washington State (Bellingham) 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 Bellingham in September?

Daytime temperatures usually reach 19°C in Bellingham in September, falling to 9°C at night.

How sunny is it in Bellingham in September?

There are normally 6 hours of bright sunshine each day in Bellingham in September - that's 49% of daylight hours.

How warm is the sea around Bellingham in September?

The average sea temperature around Bellingham in September is 12°C.

Does it rain in Bellingham in September?

There are usually 10 days with some rain in Bellingham in September and the average monthly rainfall is 67mm.

Bellingham September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:27 18:51
Monday, 15th September 2025 05:47 18:22
Tuesday, 30th September 2025 06:09 17:50

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^