The temperatures in Bellingham in September are usually low and can range between 11°C and 19°C.
You can expect rain for roughly half of the month of September in Bellingham. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Bellingham in September 2025.
If you’re planning to visit Bellingham in the near future, we highly recommend that you review the 14 day weather forecast for Bellingham before you arrive.
Temperatures
19° / 11°
Rainy Days
8
Snowy Days
0
Dry Days
22
Rainfall
118
mm
Sun Hours
6.9
Hrs
