Pennsylvania Pollen Count Today

Check today's pollen count by city in Pennsylvania. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.

Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.

Today's pollen count in Pennsylvania

Pollen levels in Pennsylvania can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Philadelphia, Pittsburgh, Allentown, Reading, Erie, Upper Darby.

Today's statewide signal

Pennsylvania’s allergy outlook from Philadelphia to Erie

Pennsylvania’s wooded hills, river valleys, urban tree canopy, and Lake Erie shoreline do not warm at the same pace. Compare pollen and weather across eight cities to see whether trees, grasses, weeds, or damp-weather mold are shaping local conditions.

Data updates regularly to reflect current conditions across Pennsylvania cities.

Highest city index now

Erie

Ragweed · Low

View today's allergy index

Average pollen index: 1
Average humidity: 64%
Average wind: 11 mph

Live city comparison

Today's pollen and weather by city

Sort Pennsylvania cities by pollen index, temperature, or trend. Select a city for its full local forecast.

		Main allergen			Weather context
Erie	2Low	Ragweed	Rising Forecast moves toward moderate conditions tomorrow.	77°F	Breezy Breezy conditions may lift pollen from trees, grasses, weeds, and surfaces.
Philadelphia	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Humid Outdoor pollen exposure looks limited for most people today.
Pittsburgh	1Very Low	Elm	Rising Forecast moves toward low conditions tomorrow.	78°F	Chance of showers Breezy conditions may lift pollen from trees, grasses, weeds, and surfaces.
Allentown	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Partly sunny Outdoor pollen exposure looks limited for most people today.
Reading	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Partly sunny Outdoor pollen exposure looks limited for most people today.
Upper Darby	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Chance of showers Outdoor pollen exposure looks limited for most people today.
Bethlehem	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Partly sunny Outdoor pollen exposure looks limited for most people today.
Scranton	1Very Low	Elm	Stable Tomorrow looks similar, near very low conditions.	77°F	Partly sunny Outdoor pollen exposure looks limited for most people today.

Erie

Ragweed is the main allergen

Low

Pollen index

Trend

Rising

77°15 mph68%

Breezy conditions may lift pollen from trees, grasses, weeds, and surfaces.

Philadelphia

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°6 mph74%

Outdoor pollen exposure looks limited for most people today.

Pittsburgh

Elm is the main allergen

Very Low

Pollen index

Trend

Rising

78°18 mph79%

Breezy conditions may lift pollen from trees, grasses, weeds, and surfaces.

Allentown

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°4 mph56%

Outdoor pollen exposure looks limited for most people today.

Reading

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°14 mph65%

Outdoor pollen exposure looks limited for most people today.

Upper Darby

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°5 mph46%

Outdoor pollen exposure looks limited for most people today.

Bethlehem

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°11 mph55%

Outdoor pollen exposure looks limited for most people today.

Scranton

Elm is the main allergen

Very Low

Pollen index

Trend

Stable

77°11 mph69%

Outdoor pollen exposure looks limited for most people today.

Regional allergy forecast

How Pennsylvania regions compare today

Philadelphia and southeastern Pennsylvania

Philadelphia and Upper Darby combine street trees, large parks, and pollen transported from surrounding suburbs. Farther inland, Reading’s position among wooded ridges can produce different bloom timing despite its relative proximity to the metro area.

OakMapleSycamoreGrass pollen

Index: 1
Humidity: 62%
Wind: 8

Lehigh Valley and northeastern Pennsylvania

Allentown and Bethlehem sit within the Lehigh Valley, while Scranton lies farther north among higher ridges. Elevation, overnight temperatures, and surrounding hardwood forest can shift spring pollen timing between these eastern cities.

MapleOakBirchRagweed

Index: 1
Humidity: 60%
Wind: 9

Pittsburgh and western Pennsylvania

Pittsburgh’s wooded slopes, river valleys, parks, and mature neighbourhood trees provide abundant spring pollen sources. Grass pollen follows in early summer before ragweed becomes the leading late-season concern.

OakMapleGrass pollenRagweed

Index: 1
Humidity: 79%
Wind: 18

Lake Erie shoreline

Cold Lake Erie water can keep spring temperatures lower near the shoreline than farther inland, delaying some flowering. Changing wind direction can then produce sharp day-to-day differences as locally released or transported pollen moves through Erie.

MapleBirchGrass pollenRagweed

Index: 2
Humidity: 68%
Wind: 15

State-specific pollen calendar

When major allergens are active in Pennsylvania

Spring trees

March to May

MarAprMay

Maple appears early, followed by oak, birch, sycamore, and other hardwoods. A sudden warm spell can compress several tree pollination periods into the same weeks.

Lawn and meadow grasses

May to August

MayJunJulAug

Grass pollen generally rises in May and peaks around June. Timothy, Kentucky bluegrass, and other wind-pollinated grasses occur in lawns, pastures, and open areas.

Ragweed season

August to mid-September

AugSepOct

Ragweed is Pennsylvania’s principal fall pollen allergen. Its lightweight pollen can travel long distances and may remain present until frost.

Damp-weather mold

Rainy spring and fall periods

AprMaySepOct

Outdoor fungi release spores from soil, vegetation, and decaying leaves. Exposure can rise during damp spring weather and again as leaves accumulate in fall.

Weather-pollen correlation

What weather means for today's allergy risk

Wind can disperse pollen, rain can temporarily wash particles down, and humidity can increase mold irritation. The city table combines pollen and weather signals so users can compare outdoor risk without opening every city page.

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Preparing today's Pennsylvania pollen dashboard

Cranberry Twp, PA 16066

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(412) 648-6161

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About Pollen in Pennsylvania

Pennsylvania allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.

Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.

Nearby state pollen forecasts

Comparing nearby states can help you understand regional allergy shifts, seasonal pollen timing, and conditions that may affect travel or outdoor plans.

New York pollen forecast Ohio pollen forecast Maryland pollen forecast Virginia pollen forecast

Pennsylvania pollen conditions across east and west

Pennsylvania allergy seasons can vary across Philadelphia, Pittsburgh, and smaller inland communities because of differences in elevation, urban tree cover, rainfall, and seasonal timing. People searching for a Pennsylvania pollen forecast are often looking for local context that reflects both major metro areas and surrounding regions.

Spring tree pollen is commonly followed by grass pollen in late spring and summer, with weed pollen becoming more prominent later in the year. Monitoring Pennsylvania pollen counts by city helps capture local variation instead of treating the whole state as one allergy zone.

Frequently asked questions about Pennsylvania pollen forecasts

How can Philadelphia have high tree pollen in such a built-up area?

Philadelphia contains extensive street trees, private tree canopy, and large parks such as Fairmount Park. Wind can also carry oak, maple, and other pollen into the city from surrounding suburbs, so exposure is not limited to the trees on an individual block.

Does Lake Erie give Erie a later allergy season?

It can delay parts of the spring season. Cold lake water often keeps shoreline air cooler while inland Pennsylvania is warming, which may slow local flowering. The effect varies with wind direction and becomes weaker away from the lake.

Is goldenrod responsible for Pennsylvania’s fall allergies?

Goldenrod is frequently blamed because its yellow flowers are visible when symptoms increase, but its heavy pollen is mainly carried by insects. Ragweed releases much lighter windborne pollen and is the more important fall allergy trigger.

Why can nearby eastern Pennsylvania cities peak on different days?

The valleys and ridges around Reading, Allentown, Bethlehem, and Scranton differ in elevation, overnight temperature, vegetation, and rainfall. Those differences affect when plants flower, while local winds determine where released pollen travels.