
Dr. Adriano Salicru
Kaiser Permanente
Check today's pollen count by city in Maryland. 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.
Pollen levels in Maryland 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 Baltimore, Annapolis, Columbia, Frederick, Germantown, Waldorf.
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Local allergy care
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.

Kaiser Permanente

ENT Associates at GBMC

Allergy Asthma Specialists of Maryland

Calvert Internal Medicine Group

Johns Hopkins Bayview Allergy & Asthma Center

Asthma and Allergy Center LLC
Showing 6 of 15 published allergist profiles in this area.
Maryland 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.
Comparing nearby states can help you understand regional allergy shifts, seasonal pollen timing, and conditions that may affect travel or outdoor plans.
Maryland pollen conditions can vary between Baltimore, nearby suburbs, and more wooded or coastal areas because of elevation changes, humidity, and diverse plant life. Searchers looking for a Maryland pollen forecast often want a page that reflects how regional allergy pressure can shift over relatively short distances.
Tree pollen commonly drives spring symptoms in Maryland, followed by grasses and later seasonal weeds. Rainfall, humidity, and urban tree cover can all influence daily pollen exposure, which makes city-level forecasts more useful than a broad statewide average alone.
Pollen measured in a city does not come only from the nearest plants. Lightweight grains can travel long distances on regional winds, so a forecast may rise before the same tree species visibly flowers in your neighbourhood.
April brings overlapping pollen from oak, hickory, mulberry, willow, and other hardwood trees. Several warm, dry days can cause multiple species to release pollen within the same short period.
Ragweed pollen is highly allergenic, and Maryland health guidance notes that fewer ragweed grains may be needed to provoke a respiratory reaction than tree pollen. Individual sensitivity still determines how strongly someone responds.
Frederick sits farther inland near higher terrain, while Annapolis is moderated by the Chesapeake Bay. Differences in overnight temperature, wind direction, rainfall, and vegetation affect when pollen is released and where it travels.
Today's statewide signal
Maryland packs coastal water, dense metro development, wooded suburbs, and Appalachian foothills into a relatively small area. Compare pollen and weather across eight cities to see where the season is starting early, peaking, or easing.
Data updates regularly to reflect current conditions across Maryland cities.
Highest city index now
Baltimore
Oak · Very High
5
Live city comparison
Sort Maryland cities by pollen index, temperature, or trend. Select a city for its full local forecast.
| Main allergen | Weather context | ||||
|---|---|---|---|---|---|
| Baltimore | 5Very High | Oak | Falling Forecast eases toward high conditions tomorrow. | 77°F | Partly sunny 14 mph wind can disperse oak pollen quickly today. |
| Annapolis | 5Very High | Oak | Falling Forecast eases toward moderate conditions tomorrow. | 77°F | Breezy 15 mph wind can disperse oak pollen quickly today. |
| Frederick | 5Very High | Oak | Stable Tomorrow looks similar, near very high conditions. | 77°F | Chance of showers 18 mph wind can disperse oak pollen quickly today. |
| Waldorf | 5Very High | Oak | Stable Tomorrow looks similar, near very high conditions. | 77°F | Humid Humid air may keep oak and outdoor mold irritation active. |
| Silver Spring | 5Very High | Oak | Falling Forecast eases toward moderate conditions tomorrow. | 77°F | Partly sunny Watch oak levels and limit long outdoor exposure during peak hours. |
| Columbia | 4High | Grass | Rising Forecast moves toward very high conditions tomorrow. | 77°F | Breezy 16 mph wind can disperse grass pollen quickly today. |
| Germantown | 4High | Oak | Stable Tomorrow looks similar, near high conditions. | 77°F | Partly sunny Watch oak levels and limit long outdoor exposure during peak hours. |
| Ellicott City | 4High | Oak | Stable Tomorrow looks similar, near high conditions. | 77°F | Humid 13 mph wind can disperse oak pollen quickly today. |
Oak is the main allergen
Pollen index
5
Trend
Falling
14 mph wind can disperse oak pollen quickly today.
Oak is the main allergen
Pollen index
5
Trend
Falling
15 mph wind can disperse oak pollen quickly today.
Oak is the main allergen
Pollen index
5
Trend
Stable
18 mph wind can disperse oak pollen quickly today.
Oak is the main allergen
Pollen index
5
Trend
Stable
Humid air may keep oak and outdoor mold irritation active.
Oak is the main allergen
Pollen index
5
Trend
Falling
Watch oak levels and limit long outdoor exposure during peak hours.
Grass is the main allergen
Pollen index
4
Trend
Rising
16 mph wind can disperse grass pollen quickly today.
Oak is the main allergen
Pollen index
4
Trend
Stable
Watch oak levels and limit long outdoor exposure during peak hours.
Oak is the main allergen
Pollen index
4
Trend
Stable
13 mph wind can disperse oak pollen quickly today.
Regional allergy forecast
Baltimore’s urban trees and parks transition quickly into the mature suburban canopy around Columbia and Ellicott City. Maple and oak dominate spring before lawns, roadside grasses, and ragweed shape the later seasons.
Silver Spring’s inner-suburban landscape gives way to Germantown’s open development and Frederick’s wooded foothills. Elevation and spring temperature differences can shift tree flowering between these cities.
Annapolis is directly influenced by Chesapeake Bay winds, while Waldorf sits inland among suburban lawns and woodland. Wind direction can change whether pollen arrives from the water or vegetation-rich land.
State-specific pollen calendar
Late February to March
Alder and maple can begin the season before many trees have visible leaves. Warm late-winter weather may move the starting date forward.
April to May
Oak, hickory, mulberry, willow, sycamore, and other trees overlap during Maryland’s strongest period for tree pollen.
May to July
Grass pollen begins while late trees are still active and is commonly strongest in June across lawns, parks, pastures, and roadsides.
August to October
Ragweed, pigweed, nettle, and other weeds rise in late summer. September is often the most difficult month for weed-sensitive residents.
Weather-pollen correlation
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.