Washington Pollen by City

Most of Washington's cities read the mild, wet Pacific Northwest pollen calendar: tree pollen peaks Feb–May, grass Apr–Jul, and ragweed Aug–Oct — a mild, wet pattern in which a long grass season is usually the bigger problem than the early tree burst, and ragweed stays light. Every city below has its own page with today’s verdict and the full 12-month season calendar.

Cities in Washington

14 cities with a pollen page, largest first

CityTree pollen seasonPopulation
SeattleFeb–May3,642,006
SpokaneApr–Jun462,286
KennewickApr–Jun259,487
BremertonFeb–May224,760
TacomaFeb–May222,758
OlympiaFeb–May217,647
RedmondFeb–May77,353
SpanawayFeb–May34,019
CamasFeb–May27,007
AnacortesFeb–May17,966
AlgonaFeb–May3,247
Whidbey Island StationFeb–May2,027
RoslynFeb–May1,076
IoneApr–Jun409

Our dataset lists 633 places in Washington; the 14 above have a page. For a smaller town, the nearest city above is the closest match.