What is the pollen count in San Marino today?

Today's pollen levels in San Marino: Tree pollen is None, Grass pollen is Very High, Weed pollen is None. Grass pollen is the dominant type right now, driven by Grass.

What does a Very High pollen count mean in San Marino?

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 San Marino right now?

The primary allergy triggers in San Marino today are Grass (Grass). These pollen types are at elevated levels and are most likely to cause symptoms for sensitive individuals.

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

When pollen is Very High in San Marino, 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 San Marino?

Yes, weather directly affects pollen levels in San Marino. Wind spreads pollen farther, rain washes it from the air, and humidity can either trap or disperse particles. Higher humidity today (90%) may help keep some pollen grounded.

San Marino, CA Pollen Count Today

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

Live pollen forecast and air quality for San Marino, California

📍 San Marino, CAToday · May 31

1/10

Breathability™ Score

Very tough breathing conditions - keep outdoor exposure brief when possible.

🌳Tree Pollen

None

🌱Grass Pollen

Very High

🌿Weed Pollen

None

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Today's Pollen Levels in San Marino

Grass pollen is the dominant contributor today in San Marino, with levels reaching Very High. Other pollen types are not a significant factor right now. With a Breathability™ Score of 1, today may feel like a tougher allergy day.

Breathability™ Score is 1/10
Tree pollen is None, led by Alder and Birch
Grass pollen is Very High, led by Grass
Weed pollen is None, led by Ragweed and Mugwort
Air quality is Moderate today

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Yesterday's Pollen in San Marino

→Tree pollen: None yesterday, None today

→Grass pollen: Very High yesterday, Very High today

→Weed pollen: None yesterday, None today

How Today's Pollen May Affect You

Mild allergy sufferers

You may feel symptoms sooner today. Grass pollen is elevated and air quality is Moderate, so lean toward shorter outings and cleaner indoor air.

Moderate allergy sufferers

Today may feel challenging. Limit prolonged outdoor time, keep indoor air filtered, and prioritize lower-exposure times of day.

Severe allergy sufferers

This may be a high-burden day. Minimize outdoor exposure where possible and focus on indoor spaces with filtered air.

5-Day Pollen Forecast

Today

May 31

Overall: Very High

Tree: None

Grass: Very High

Weed: None

Wind: 10 mph

Rain: 0%

Humidity: 57%

Mon

Jun 1

Overall: Very High

Tree: None

Grass: Very High

Weed: None

Wind: 10 mph

Rain: 0%

Humidity: 47%

Tue

Jun 2

Overall: Very High

Tree: None

Grass: Very High

Weed: None

Wind: 10 mph

Rain: 0%

Humidity: 49%

Wed

Jun 3

Overall: Very High

Tree: None

Grass: Very High

Weed: None

Wind: 9 mph

Rain: 0%

Humidity: 49%

Thu

Jun 4

Overall: Very High

Tree: None

Grass: Very High

Weed: None

Wind: 10 mph

Rain: 0%

Humidity: 52%

Tree Pollen in San Marino Today

Tree pollen in San Marino 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 San Marino Today

Grass pollen in San Marino is Very High today, reaching 274.28 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 individuals

Species Breakdown

Grass274.28 grains/m³

Weed Pollen in San Marino Today

Weed pollen in San Marino is None today. Weed pollen season runs from late summer into fall (August through October), with ragweed as the primary trigger for most allergy sufferers. Current levels are low enough that most people should feel comfortable outdoors.

Species Breakdown

Ragweed0 grains/m³

Mugwort0 grains/m³

Air Quality in San Marino Today

🌬️

Air Quality

Moderate

Air Pollutant Breakdown

PM2.5Moderate

17 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

21 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

46 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

28.1 µg/m³

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

Sulfur Dioxide (SO2)Good

4.8 µg/m³

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

Carbon Monoxide (CO)Good

156.9 µg/m³

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

Weather in San Marino Today

☀️

Weather

58°F

Clear

Humidity

90%

Wind

2 mph SE

Feels Like

58°F

Pressure

1013 mb

Frequently Asked Questions

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