National Weather Service issues heat advisory for northwest Washington

WHATCOM COUNTY, Wash. — The National Weather Service (NWS) issued a heat advisory on June 20, 2026, at about 11:40am. According to the NWS, the advisory remains in effect until June 23, 2026, at about 11:00pm for portions of northwest and west central Washington. The NWS statement notes that high temperatures between 85° and 95° and low temperatures between 55° and 60° are expected from about 11:00am on Monday to about 11:00pm on Tuesday.

According to weather forecasts from meteoblue, daily high temperatures across 16 locations in Whatcom County are forecast to peak on Tuesday before decreasing on Wednesday.

Location	Monday high temperature	Tuesday high temperature	Wednesday high temperature
Bellingham	81°	83°	79°
Lummi Island	74°	77°	73°
Sandy Point	78°	81°	79°
Birch Bay	81°	82°	77°
Blaine	82°	83°	78°
Point Roberts	71°	71°	69°
Ferndale	83°	85°	80°
Laurel	85°	86°	81°
Lynden	87°	89°	82°
Sumas	88°	90°	83°
Everson	88°	90°	84°
Maple Falls	89°	90°	85°
Glacier	81°	83°	79°
Deming	88°	90°	84°
Acme	82°	84°	80°
Sudden Valley	84°	87°	82°

Whatcom News readers are encouraged to stay up to date with current weather alerts and forecasts and air quality readings for their specific Whatcom County locations along with tide tables via the Whatcom News Weather page.