Ohio Pollen by City

Most of Ohio's cities read the warm, humid subtropical Southeast pollen calendar: tree pollen peaks Feb–Apr, grass Apr–Sep, and ragweed Aug–Nov — an unusually long, overlapping season — the warm climate stretches grass across much of the year and pushes ragweed deep into autumn. Every city below has its own page with today’s verdict and the full 12-month season calendar.

Cities in Ohio

17 cities with a pollen page, largest first

CityTree pollen seasonPopulation
CincinnatiMar–May1,726,642
ClevelandMar–May1,695,555
ColumbusMar–May1,635,039
DaytonMar–May672,634
AkronMar–May537,241
ToledoMar–May494,010
YoungstownMar–May313,898
CantonMar–May287,351
LorainMar–May201,994
LakewoodMar–May50,007
StrongsvilleMar–May45,983
AvonMar–May25,317
PerrysburgMar–May25,181
VandaliaMar–May15,053
MinervaMar–May3,196
FairfaxMar–May1,566
RussellvilleMar–May717

Our dataset lists 1,253 places in Ohio; the 17 above have a page. For a smaller town, the nearest city above is the closest match.