What is the pollen count in Herreid today?

Today's pollen levels in Herreid: 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 Herreid?

Pollen in Herreid is forecast to reach High 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 Herreid?

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 Herreid right now?

The primary allergy triggers in Herreid 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 Herreid?

When pollen is Very High in Herreid, 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 Herreid?

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

Herreid, SD Pollen Count Today

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

Live pollen forecast and air quality for Herreid, South Dakota

📍 Herreid, SDToday · Sep 20

2/10

Breathability™ Score

Challenging day - reduce exposure during peak pollen times.

🌳Tree Pollen

None

🌱Grass Pollen

Low

🌿Weed Pollen

Very High

mypollenpal.comAdd to your site →

Today's Pollen Levels in Herreid

Weed pollen is the dominant contributor today in Herreid, with levels reaching Very High. Other pollen types are not a significant factor right now. With a Breathability™ Score of 2, today may feel like a tougher allergy day.

Breathability™ Score is 2/10
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

Today’s pick

5Strands Allergy Test Kit →

Find out exactly which allergens are triggering your symptoms so you can treat the root cause.

As an Amazon Associate, we earn from qualifying purchases.

How Today's Pollen May Affect You

Mild allergy sufferers

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

Moderate allergy sufferers

Today may be rough. Limit prolonged outdoor time, keep indoor air filtered, and favor 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

Pollen in Herreid eases to Moderate by Wednesday.

Today

Sep 20

Overall: Very High

Tree: None

Grass: Low

Weed: Very High

Wind: 14 mph

Rain: 52% (may wash pollen out)

Humidity: 75%

Mon

Sep 21

Overall: High

Tree: None

Grass: Low

Weed: High

Wind: 12 mph

Rain: 52% (may wash pollen out)

Humidity: 75%

Tue

Sep 22

Overall: Very High

Tree: None

Grass: Low

Weed: Very High

Wind: 16 mph (may spread pollen)

Rain: 24%

Humidity: 83%

Wed

Sep 23

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 21 mph (may spread pollen)

Rain: 72% (may wash pollen out)

Humidity: 81%

Thu

Sep 24

Overall: Very High

Tree: None

Grass: Low

Weed: Very High

Wind: 16 mph (may spread pollen)

Rain: 31%

Humidity: 80%

Rain is likely Wednesday (72% chance). The hour or two right after it stops is usually the cleanest air of the day. Plan around Thursday though. Pollen often climbs the day after rain, when plants use the moisture to release a fresh burst.

Winds could reach 21 mph Wednesday. Gusts carry pollen miles from the plant that released it, so a windy day can feel worse than the count suggests.

Tree Pollen in Herreid Today

Tree pollen in Herreid 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 Herreid Today

Grass pollen in Herreid is Low today, reaching 6.06 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

Grass6.06 grains/m³

Weed Pollen in Herreid Today

Weed pollen in Herreid is Very High today, reaching 188.62 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

Ragweed188.62 grains/m³

Mugwort0 grains/m³

Air Quality in Herreid Today

🌬️

Air Quality

Good

Air Pollutant Breakdown

PM2.5Good

2 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

2 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

61 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

1.3 µg/m³

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

Sulfur Dioxide (SO2)Good

0.5 µg/m³

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

Carbon Monoxide (CO)Good

125 µg/m³

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

See the full Herreid air quality report →

Weather in Herreid Today

🌤️

Weather

60°F

Overcast

Humidity

61%

Wind

14 mph E

Feels Like

52°F

Pressure

1021 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Weed pollen is running Very High in Herreid 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 South Dakota →

Get free daily pollen alerts

Morning alerts for Herreid 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.

Browse all guides →

Related Cities in South Dakota

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