Historical weather data, all-time temperature records, and monthly climate averages for Bellingham, WA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Bellingham sits squarely in that classic Pacific Northwest limbo — mild but unsettled, with a 62% chance of rain and average temps in the mid-50s to low 40s. The date has swung from a balmy 66° in 2016 to a sharp 28° back in 1997, so don't put the layers away just yet.
Bellingham's weather has genuine range for a coastal Pacific Northwest city — from a scorching 92° in July 2009 to a brutal 3° in December 2021, just days after a storm dropped 14 inches of snow in a single day. The wettest punch on record was 3.26 inches in a single November day in 2021, a year that clearly had something to prove.
Summer is Bellingham's sweet spot, with highs peaking around 74–75° in mid-to-late July — pleasant and rarely oppressive. If you're trying to avoid the rain, steer clear of mid-November, the wettest stretch of the year averaging over an inch of precipitation in a single week. Winters are cool and gray, with highs bottoming out in the mid-40s through December and January.