What is the pollen count in Louisville today?

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

What does a High pollen count mean in Louisville?

A High pollen count means concentrations are significant. Most allergy sufferers will notice symptoms, and even people with mild sensitivity may feel some irritation.

What are the main allergy triggers in Louisville right now?

The primary allergy triggers in Louisville today are Weed (Mugwort and Ragweed). 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 High in Louisville?

When pollen is High in Louisville, 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 Louisville?

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

Louisville, KY Pollen Count Today

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

Live pollen forecast and air quality for Louisville, Kentucky

📍 Louisville, KYToday · Sep 2

4/10

Breathability™ Score

Mixed conditions - sensitive groups may want extra precautions.

🌳Tree Pollen

None

🌱Grass Pollen

None

🌿Weed Pollen

High

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Today's Pollen Levels in Louisville

Weed pollen is the dominant contributor today in Louisville, with levels reaching 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 None, led by Grass
Weed pollen is High, led by Mugwort and Ragweed
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

Today

Sep 1

Overall: High

Tree: None

Grass: None

Weed: High

Wind: 7 mph

Rain: 4%

Humidity: 64%

Wed

Sep 2

Overall: High

Tree: None

Grass: None

Weed: High

Wind: 7 mph

Rain: 3%

Humidity: 46%

Thu

Sep 3

Overall: Moderate

Tree: None

Grass: None

Weed: Moderate

Wind: 7 mph

Rain: 17%

Humidity: 45%

Fri

Sep 4

Overall: Moderate

Tree: None

Grass: None

Weed: Moderate

Wind: 10 mph

Rain: 17%

Humidity: 46%

Sat

Sep 5

Overall: Moderate

Tree: None

Grass: None

Weed: Moderate

Wind: 9 mph

Rain: 63% (may wash pollen out)

Humidity: 61%

Tree Pollen in Louisville Today

Tree pollen in Louisville 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

Oak pollen in Louisville →0 grains/m³

Grass Pollen in Louisville Today

Grass pollen in Louisville 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

Grass pollen in Louisville →0 grains/m³

Weed Pollen in Louisville Today

Weed pollen in Louisville is High today, reaching 102.13 grains/m³. Mugwort and Ragweed 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

Mugwort102.13 grains/m³

Ragweed pollen in Louisville →101.26 grains/m³

Air Quality in Louisville Today

🌬️

Air Quality

Good

Air Pollutant Breakdown

PM2.5Moderate

13 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

13 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

98 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

11.5 µg/m³

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

Sulfur Dioxide (SO2)Good

1.7 µg/m³

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

Carbon Monoxide (CO)Good

179 µg/m³

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

See the full Louisville air quality report →

Weather in Louisville Today

☀️

Weather

87°F

Clear

Humidity

48%

Wind

4 mph W

Feels Like

89°F

Pressure

1015 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Weed pollen is running High in Louisville 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 Kentucky →

Get free daily pollen alerts

Morning alerts for Louisville 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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Related Cities in Kentucky

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

Louisville pollen by allergen

Ragweed pollen Grass pollen Oak pollen Maple pollen