California Pollen by City

California's cities read the mild Mediterranean California pollen calendar: tree pollen peaks Jan–Apr, grass Mar–Jun, and ragweed Aug–Oct — an early start — mild winters pull tree pollen forward into late winter, ahead of a spring grass peak and a relatively contained ragweed fall. Every city below has its own page with today’s verdict and the full 12-month season calendar.

Cities in California

42 cities with a pollen page, largest first

CityTree pollen seasonPopulation
Los AngelesJan–Apr11,984,083
San FranciscoJan–Apr3,417,736
San DiegoJan–Apr3,064,435
RiversideJan–Apr2,333,040
SacramentoFeb–May1,975,489
San JoseJan–Apr1,827,643
FresnoJan–Apr732,197
Mission ViejoJan–Apr647,990
BakersfieldJan–Apr566,351
ConcordFeb–May531,305
Long BeachJan–Apr455,548
OaklandJan–Apr439,418
StocktonFeb–May410,053
OxnardJan–Apr369,935
IndioJan–Apr366,757
VictorvilleJan–Apr362,549
ModestoJan–Apr359,115
AnaheimJan–Apr344,521
AntiochFeb–May335,183
Santa AnaJan–Apr312,534
IrvineJan–Apr311,690
Santa RosaFeb–May292,251
Chula VistaJan–Apr276,375
Santa ClaritaJan–Apr270,147
FremontJan–Apr228,295
San BernardinoJan–Apr222,724
FontanaJan–Apr214,169
Moreno ValleyJan–Apr211,666
Thousand OaksJan–Apr207,637
Santa BarbaraJan–Apr202,039
SunnyvaleJan–Apr154,236
PasadenaJan–Apr136,969
RocklinFeb–May73,327
PetalumaFeb–May59,247
Morgan HillJan–Apr45,425
CoachellaJan–Apr43,307
Live OakJan–Apr16,911
Joshua TreeJan–Apr6,234
BonsallJan–Apr4,332
OccidentalFeb–May1,225
ManilaFeb–May985
North EdwardsJan–Apr903

Our dataset lists 1,598 places in California; the 42 above have a page. For a smaller town, the nearest city above is the closest match.