Low
Pollen is low — most people won't notice
Grass pollen is the main trigger · Updated 23 hours ago
Today in Hartford: 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 2:01 AM.
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Pollen levels in Hartford 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 Hartford is not yet available.
Grass pollen is the highest supported pollen type in Hartford today. Grass pollen is very low.
Tree pollen in Hartford is none today.
Grass pollen in Hartford is very low today.
Weed pollen in Hartford is none today.
Tomorrow's pollen forecast for Hartford is not yet available.
Hartford, Connecticut sits in the Connecticut River Valley, where a humid continental climate, mixed hardwood forests, and ample rainfall create a long and intense allergy season spanning roughly March through October.
Tree pollen kicks things off in early spring, with oak, birch, maple, ash, hickory, and Eastern red cedar driving symptoms from late March through May; oak and birch typically produce the most severe peaks in April.
As tree pollen wanes, grass pollen takes over from mid-May through July, dominated by timothy, Kentucky bluegrass, orchard grass, and rye, with counts often highest in June.
Late summer and fall bring weed pollen, led by common and giant ragweed beginning in mid-August and persisting until the first hard frost in October; pigweed, lamb's quarters, and plantain add to the load.
Transitional periods—late May (trees and grasses) and late August (grasses and ragweed)—can amplify symptoms as allergens overlap.
Beyond pollen, the region's humidity fuels outdoor mold spores, especially from decaying leaves in fall, while indoor dust mites thrive in sealed winter homes. Urban traffic corridors along I-84 and I-91 can worsen reactions through particulate pollution.
Overall, Hartford's profile is defined by a prolonged, multi-phase season with significant tree and ragweed burdens intensified by valley humidity.