What is the pollen count in Rockville today?

Today's pollen levels in Rockville: Tree pollen is None, Grass pollen is Low, Weed pollen is Very High. Weed pollen is the dominant type right now, driven by Ragweed and Mugwort.

What will the pollen count be tomorrow in Rockville?

Pollen in Rockville is forecast to reach Moderate tomorrow. Weed pollen is the main driver. That's a full-day figure, so early morning usually runs higher than late afternoon. Check again in the morning, because wind and rain can shift it overnight.

What does a Very High pollen count mean in Rockville?

A Very High pollen count means concentrations are at their peak. Nearly all allergy sufferers will experience noticeable symptoms, and limiting outdoor exposure is recommended.

What are the main allergy triggers in Rockville right now?

The primary allergy triggers in Rockville today are Weed (Ragweed and Mugwort). These pollen types are at elevated levels and are most likely to cause symptoms for sensitive people.

What should allergy sufferers do when pollen is Very High in Rockville?

When pollen is Very High in Rockville, limit outdoor time during midday when concentrations peak. Keep windows closed, shower after being outside, and consider taking antihistamines before symptoms start.

Does weather affect pollen levels in Rockville?

Yes, weather directly affects pollen levels in Rockville. Wind spreads pollen farther, rain washes it from the air, and humidity can either trap or disperse particles.

Rockville, MD Pollen Count Today

Name: Pollen Data for Rockville
Creator: MyPollenPal
Keywords: pollen, air quality, allergies, forecast

Live pollen forecast and air quality for Rockville, Maryland

📍 Rockville, MDToday · Sep 19

4/10

Breathability™ Score

Mixed conditions - sensitive groups may want extra precautions.

🌳Tree Pollen

None

🌱Grass Pollen

Low

🌿Weed Pollen

Very High

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Today's Pollen Levels in Rockville

Weed pollen is the dominant contributor today in Rockville, with levels reaching Very High. Other pollen types are not a significant factor right now. With a Breathability™ Score of 4, conditions are mixed and may vary through the day.

Breathability™ Score is 4/10
Tree pollen is None, led by Alder and Birch
Grass pollen is Low, led by Grass
Weed pollen is Very High, led by Ragweed and Mugwort
Air quality is Good today

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How Today's Pollen May Affect You

Mild allergy sufferers

You may notice mild irritation at peak times. Weed pollen is elevated; consider shorter midday exposure and keep water handy.

Moderate allergy sufferers

Plan around peak pollen windows. Try errands early or later, and consider a mask in high-traffic outdoor areas.

Severe allergy sufferers

Use high-protection habits today: shorter trips, cleaner indoor air, and reduced exposure during peak pollen hours.

5-Day Pollen Forecast

Pollen in Rockville eases to Low by Monday.

Today

Sep 19

Overall: High

Tree: None

Grass: Low

Weed: High

Wind: 11 mph

Rain: 6%

Humidity: 60%

Sun

Sep 20

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 9 mph

Rain: 78% (may wash pollen out)

Humidity: 81%

Mon

Sep 21

Overall: Low

Tree: None

Grass: Low

Weed: Low

Wind: 9 mph

Rain: 89% (may wash pollen out)

Humidity: 95%

Tue

Sep 22

Overall: Low

Tree: None

Grass: Low

Weed: Low

Wind: 11 mph

Rain: 94% (may wash pollen out)

Humidity: 97%

Wed

Sep 23

Overall: Low

Tree: None

Grass: Low

Weed: Low

Wind: 11 mph

Rain: 94% (may wash pollen out)

Humidity: 97%

Rain is likely Sunday (78% chance). The hour or two right after it stops is usually the cleanest air of the day. Plan around Monday though. Pollen often climbs the day after rain, when plants use the moisture to release a fresh burst.

Tree Pollen in Rockville Today

Tree pollen in Rockville is None today. Tree pollen season typically runs from early spring through late May, peaking when deciduous trees release their pollen. On low days like today, outdoor activities are generally comfortable for most allergy sufferers.

Species Breakdown

Alder0 grains/m³

Birch0 grains/m³

Hazel0 grains/m³

Oak0 grains/m³

Grass Pollen in Rockville Today

Grass pollen in Rockville is Low today, reaching 5.43 grains/m³. Grass is currently elevated. People with grass pollen sensitivity may notice nasal congestion and itchy eyes, especially during outdoor activities.

Common Symptoms

Itchy nose and eyes
Sneezing fits
Nasal congestion
Watery eyes
Coughing or wheezing for sensitive people

Species Breakdown

Grass5.43 grains/m³

Weed Pollen in Rockville Today

Weed pollen in Rockville is Very High today, reaching 237.72 grains/m³. Ragweed and Mugwort are the primary driver. Ragweed is the most common allergen in this category, and elevated levels can trigger persistent symptoms even in people who are only mildly sensitive.

Common Symptoms

Persistent sneezing
Runny nose
Itchy eyes and throat
Nasal congestion
Fatigue from prolonged exposure

Species Breakdown

Ragweed237.72 grains/m³

Mugwort46.08 grains/m³

Air Quality in Rockville Today

🌬️

Air Quality

Good

Air Pollutant Breakdown

PM2.5Good

8 µg/m³

Tiny particles smaller than 2.5 micrometers that can reach deep into your lungs and bloodstream. High levels can affect breathing and heart health.

PM10Good

9 µg/m³

Larger particles up to 10 micrometers, like dust or pollen. They can irritate your airways and worsen allergies or asthma.

Ozone (O3)Moderate

113 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

2.8 µg/m³

A respiratory irritant from vehicle exhaust that can trigger inflammation in sensitive airways.

Sulfur Dioxide (SO2)Good

1.8 µg/m³

Even brief exposure can tighten airways, especially for people with asthma.

Carbon Monoxide (CO)Good

160 µg/m³

High levels reduce oxygen delivery in the body, compounding breathing difficulty on high-pollen days.

See the full Rockville air quality report →

Weather in Rockville Today

🌤️

Weather

79°F

Sunny

Humidity

45%

Wind

5 mph ESE

Feels Like

79°F

Pressure

1019 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Weed pollen is running Very High in Rockville today. If cetirizine (Zyrtec) or a steroid nasal spray stopped holding your symptoms down, or they drag on for months at a time, a board-certified allergist can test exactly what you react to and treat the cause instead of the symptom.

See 5 board-certified allergists in Maryland →

Get free daily pollen alerts

Morning alerts for Rockville when pollen is high. One email a day, only when it matters.

Allergy Guides and Resources

Seasonal pollen guides, daily city rankings, and practical tips for managing your allergies.

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