What is the pollen count in Harvard today?

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

What will the pollen count be tomorrow in Harvard?

Pollen in Harvard is forecast to reach Low 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 Low pollen count mean in Harvard?

A Low pollen count means concentrations are minimal. Most people, including those with mild allergies, can spend time outdoors comfortably.

What are the main allergy triggers in Harvard right now?

Pollen levels across all types are currently low in Harvard. Most allergy sufferers should find conditions manageable today.

What should allergy sufferers do when pollen is Low in Harvard?

Pollen levels are low in Harvard today, so most outdoor activities should be comfortable. It is still a good idea to check levels daily, since conditions can change quickly with wind and weather shifts.

Does weather affect pollen levels in Harvard?

Yes, weather directly affects pollen levels in Harvard. Wind spreads pollen farther, rain washes it from the air, and humidity can either trap or disperse particles. Higher humidity today (88%) may help keep some pollen grounded.

Harvard, MA Pollen Count Today

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

Live pollen forecast and air quality for Harvard, Massachusetts

📍 Harvard, MAToday · Oct 13

8/10

Breathability™ Score

Excellent breathing conditions for most plans today.

🌳Tree Pollen

None

🌱Grass Pollen

None

🌿Weed Pollen

Low

mypollenpal.comAdd to your site →

Today's Pollen Levels in Harvard

Weed pollen is slightly elevated at Low levels in Harvard. Overall conditions are manageable for most people. With a Breathability™ Score of 8, breathing conditions look good for most people.

Breathability™ Score is 8/10
Tree pollen is None, led by Alder and Birch
Grass pollen is None, led by Grass
Weed pollen is Low, led by Ragweed and Mugwort
Air quality is Good today

How Today's Pollen May Affect You

Mild allergy sufferers

Most plans can stay the same today. Weed pollen is elevated and air quality is Good, so a quick rinse after time outside may help.

Moderate allergy sufferers

Conditions look manageable with routine precautions. Keep windows closed during peak pollen periods and shower after outdoor time.

Severe allergy sufferers

Even on a better day, keep your usual high-protection routine and avoid long exposure when pollen spikes.

5-Day Pollen Forecast

Pollen in Harvard holds at Low every day through Friday.

Today

Oct 12

Overall: Low

Tree: None

Grass: None

Weed: Low

Wind: 9 mph

Rain: 76% (may wash pollen out)

Humidity: 84%

Tue

Oct 13

Overall: Low

Tree: None

Grass: None

Weed: Low

Wind: 11 mph

Rain: 80% (may wash pollen out)

Humidity: 93%

Wed

Oct 14

Overall: Low

Tree: None

Grass: None

Weed: Low

Wind: 12 mph

Rain: 72% (may wash pollen out)

Humidity: 81%

Thu

Oct 15

Overall: Low

Tree: None

Grass: None

Weed: Low

Wind: 12 mph

Rain: 10%

Humidity: 65%

Fri

Oct 16

Overall: Low

Tree: None

Grass: None

Weed: Low

Wind: 15 mph (may spread pollen)

Rain: 89% (may wash pollen out)

Humidity: 88%

Rain is likely Tuesday (80% chance). The hour or two right after it stops is usually the cleanest air of the day. Plan around Wednesday though. Pollen often climbs the day after rain, when plants use the moisture to release a fresh burst.

Tree Pollen in Harvard Today

Tree pollen in Harvard 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 Harvard Today

Grass pollen in Harvard is None today. Grass pollen season typically peaks from late spring through summer (May through August in most regions). On low-count days, grass allergy sufferers can generally spend time outdoors without significant symptoms.

Species Breakdown

Grass0 grains/m³

Weed Pollen in Harvard Today

Weed pollen in Harvard is Low today, reaching 5.90 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

Ragweed5.90 grains/m³

Mugwort0 grains/m³

Air Quality in Harvard Today

🌬️

Air Quality

Good

Air Pollutant Breakdown

PM2.5Good

4 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

4 µg/m³

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

Ozone (O3)Good

53 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

15.9 µg/m³

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

Sulfur Dioxide (SO2)Good

0.6 µg/m³

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

Carbon Monoxide (CO)Good

234 µg/m³

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

See the full Harvard air quality report →

Weather in Harvard Today

🌤️

Weather

57°F

Overcast

Humidity

88%

Wind

4 mph NW

Feels Like

56°F

Pressure

1010 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Pollen shifts week to week in Harvard. 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 Massachusetts →

Get free daily pollen alerts

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

Join 1,807 allergy sufferers getting daily pollen alerts.

Allergy Guides and Resources

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

Browse all guides →

Related Cities in Massachusetts

Looking for more places? Browse popular cities or return to the Massachusetts page.