Colorado Pollen by City

Colorado's cities read the high-elevation Mountain West pollen calendar: tree pollen peaks Mar–May, grass May–Jul, and ragweed Aug–Oct — short, sharp seasons set late by elevation, with sagebrush adding to the late-summer weed load. Every city below has its own page with today’s verdict and the full 12-month season calendar.

Cities in Colorado

7 cities with a pollen page, largest first

CityTree pollen seasonPopulation
DenverMar–May2,714,768
Colorado SpringsMar–May643,336
AuroraMar–May394,432
Fort CollinsMar–May336,364
Ponderosa ParkMar–May3,453
TellurideFeb–May2,160
EldoraMar–May465

Our dataset lists 477 places in Colorado; the 7 above have a page. For a smaller town, the nearest city above is the closest match.