Low
Pollen is low — most people won't notice
Grass pollen is the main trigger · Updated 23 hours ago
Today in Evanston: grass pollen is very low, tree pollen is none, weed pollen is none. Overall score: 6/100. Allergies are unlikely for most people right now. Updated at 1:01 AM.
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Pollen levels in Evanston are currently low. Most people should not experience allergy symptoms from pollen.
Tree pollen: None. Grass pollen: Very Low. Weed pollen: None.
Tomorrow's pollen forecast for Evanston is not yet available.
Grass pollen is the highest supported pollen type in Evanston today. Grass pollen is very low.
Tree pollen in Evanston is none today.
Grass pollen in Evanston is very low today.
Weed pollen in Evanston is none today.
Tomorrow's pollen forecast for Evanston is not yet available.
Evanston, Illinois, situated along Lake Michigan just north of Chicago, experiences a humid continental climate that produces a distinct, multi-phase allergy season stretching from early spring through the first hard frost.
Tree pollen kicks off the year, typically emerging in late March and peaking in April and May, with oak, maple, birch, ash, cottonwood, elm, and walnut being the dominant culprits along Evanston's tree-lined streets and lakefront parks.
As tree counts taper, grass pollen takes over from mid-May through July, driven largely by Kentucky bluegrass, timothy, orchard grass, and perennial ryegrass—species widespread in area lawns, parkways, and prairie remnants.
The transition period in late May and June often sees tree and grass pollens overlap, intensifying symptoms for many sufferers.
Weed season then dominates from August through October, with ragweed being the primary offender, joined by lamb's quarters, pigweed, and plantain.
Beyond pollen, Evanston's lake-influenced humidity fosters significant outdoor mold growth, particularly in leaf litter during damp fall weeks, while indoor dust mites thrive year-round in heated winter interiors.
Proximity to Chicago also means urban air pollution can compound respiratory irritation.
Overall, Evanston's allergy profile is characterized by a long, layered pollen calendar amplified by lakefront humidity and persistent mold pressure.