When is pollen worst in Kennett Square?

Kennett Square runs the classic three-wave calendar: tree pollen Mar–May, grass May–Jul, then ragweed Aug–Oct. The two worst stretches are the spring tree peak and the late-summer ragweed peak. Currently, grass pollen is what's driving counts this month.

What's in the air in Kennett Square right now?

Right now grass pollen leads in Kennett Square at a Moderate (3/5) level. The species actually in the air today: Pine, Oak, and Grasses. On a quiet live day, Kennett Square's seasonal calendar fills in what's typically airborne this time of year.

Is tree or grass pollen higher in Kennett Square in spring?

In spring, tree pollen leads in Kennett Square — trees pollinate Mar–May, ahead of grass (May–Jul). The handoff is the tail of the tree window: tree counts taper as grass climbs, so an early-spring flare is more likely tree pollen and a late-spring one more likely grass.

What makes Kennett Square's pollen season distinctive?

Kennett Square sits in the cold-temperate Northeast zone, which means a sharply defined calendar — a hard winter lull, then a compact spring tree burst before grass and a long ragweed fall. That shapes when symptoms hit and which allergen to watch.

How do I reduce pollen exposure in Kennett Square?

Through Kennett Square's peak windows (tree Mar–May, grass May–Jul, ragweed Aug–Oct), keep windows shut and run AC on recirculate; counts run highest on dry, warm, windy mornings, so push outdoor activity to late afternoon or just after rain, which clears pollen from the air. A HEPA purifier indoors, a saline rinse after being outside, showering before bed, and starting antihistamines a week or two before your worst local window all measurably cut symptoms.

What pollen index counts as high?

Pollen is reported on a categorical scale — None, Low, Moderate, High, and Very High. "High" and above means most allergy sufferers notice symptoms even with brief outdoor exposure, and sensitized people should limit time outside and pre-medicate. "Low" to "Moderate" usually only affects highly sensitive individuals.

Kennett Square, Pennsylvania Pollen Count

Kennett Square pollen count and allergy forecast — tree, grass, and ragweed seasons and what’s pollinating now

Kennett Square, PA · Pollen count right now

Grass pollen is Moderate in Kennett Square today

Grass: Moderate 3/5Tomorrow: Moderate

Today’s pollen by type

TreeVery Low1/5
GrassModerate3/5
Weed / RagweedOut of season

Active now: Pine, Oak, Grasses.

Kennett Square pollen calendar

Typical peak months for each pollen type in this climate region. The highlighted column is the current month.

JFMAMJJASOND

TreeMar–May

GrassMay–Jul

WeedAug–Oct

Allergy relief

Zyrtec 24-Hour Allergy Relief (Cetirizine 10 mg)
A once-daily, non-drowsy oral antihistamine. Start it a couple of weeks before your worst pollen season for the best symptom control.
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NeilMed Sinus Rinse Kit (Saline Nasal Irrigation)
A saline rinse physically flushes pollen out of the nasal passages. Use it after time outdoors during peak season to cut the allergen load before symptoms build.
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How Kennett Square’s pollen count works

The calendar above is tuned to Kennett Square’s cold-temperate Northeast climate, not a national average: tree pollen peaks Mar–May, grass May–Jul, and ragweed Aug–Oct here. Those windows are why grass pollen is the one in season in Kennett Square right now.

Right now grass pollen leads in Kennett Square at a Moderate (3/5) level. The species actually in the air today: Pine, Oak, and Grasses. Counts run highest on warm, dry, windy mornings and drop after rain, which washes pollen out of the air — reported on the None / Low / Moderate / High / Very High scale.

Frequently asked

When is pollen worst in Kennett Square?: Kennett Square runs the classic three-wave calendar: tree pollen Mar–May, grass May–Jul, then ragweed Aug–Oct. The two worst stretches are the spring tree peak and the late-summer ragweed peak. Currently, grass pollen is what's driving counts this month.
What's in the air in Kennett Square right now?: Right now grass pollen leads in Kennett Square at a Moderate (3/5) level. The species actually in the air today: Pine, Oak, and Grasses. On a quiet live day, Kennett Square's seasonal calendar fills in what's typically airborne this time of year.
Is tree or grass pollen higher in Kennett Square in spring?: In spring, tree pollen leads in Kennett Square — trees pollinate Mar–May, ahead of grass (May–Jul). The handoff is the tail of the tree window: tree counts taper as grass climbs, so an early-spring flare is more likely tree pollen and a late-spring one more likely grass.
What makes Kennett Square's pollen season distinctive?: Kennett Square sits in the cold-temperate Northeast zone, which means a sharply defined calendar — a hard winter lull, then a compact spring tree burst before grass and a long ragweed fall. That shapes when symptoms hit and which allergen to watch.
How do I reduce pollen exposure in Kennett Square?: Through Kennett Square's peak windows (tree Mar–May, grass May–Jul, ragweed Aug–Oct), keep windows shut and run AC on recirculate; counts run highest on dry, warm, windy mornings, so push outdoor activity to late afternoon or just after rain, which clears pollen from the air. A HEPA purifier indoors, a saline rinse after being outside, showering before bed, and starting antihistamines a week or two before your worst local window all measurably cut symptoms.
What pollen index counts as high?: Pollen is reported on a categorical scale — None, Low, Moderate, High, and Very High. "High" and above means most allergy sufferers notice symptoms even with brief outdoor exposure, and sensitized people should limit time outside and pre-medicate. "Low" to "Moderate" usually only affects highly sensitive individuals.

More for Kennett Square

See the full Kennett Square, PA weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality.