Boise, ID Pollen Count Today

Live pollen forecast and air quality for Boise, Idaho

šŸ“ Boise, IDToday Ā· Sep 20
4/10
Breathabilityā„¢ Score
Mixed conditions - sensitive groups may want extra precautions.
šŸŒ³Tree Pollen
None
šŸŒ±Grass Pollen
Moderate
šŸŒæWeed Pollen
Moderate
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Today's Pollen Levels in Boise

Grass pollen and Weed pollen are both elevated today in Boise, which is driving the Breathabilityā„¢ Score down. People sensitive to multiple pollen types may notice stronger symptoms. With a Breathabilityā„¢ Score of 4, conditions are mixed and may vary through the day.

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 Boise holds at High every day through Thursday.

Today
Sep 20
Overall: High
Tree: None
Grass: Moderate
Weed: High
Wind: 6 mph
Rain: 1%
Humidity: 36%
Mon
Sep 21
Overall: High
Tree: None
Grass: Moderate
Weed: High
Wind: 7 mph
Rain: 3%
Humidity: 29%
Tue
Sep 22
Overall: High
Tree: None
Grass: Moderate
Weed: High
Wind: 9 mph
Rain: 5%
Humidity: 22%
Wed
Sep 23
Overall: High
Tree: None
Grass: Moderate
Weed: High
Wind: 12 mph
Rain: 2%
Humidity: 21%
Thu
Sep 24
Overall: High
Tree: None
Grass: Moderate
Weed: High
Wind: 6 mph
Rain: 5%
Humidity: 25%

Tree Pollen in Boise Today

Tree pollen in Boise 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/mĀ³
Birch0 grains/mĀ³
Hazel0 grains/mĀ³
Oak0 grains/mĀ³

Grass Pollen in Boise Today

Grass pollen in Boise is Moderate today, reaching 20.28 grains/mĀ³. 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

Grass20.28 grains/mĀ³

Weed Pollen in Boise Today

Weed pollen in Boise is Moderate today, reaching 53.19 grains/mĀ³. 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

Ragweed53.19 grains/mĀ³
Mugwort2.97 grains/mĀ³

Air Quality in Boise Today

šŸŒ¬ļø
Air Quality
Good
Good

Air Pollutant Breakdown

PM2.5Good
6 Āµg/mĀ³
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
6 Āµg/mĀ³
Larger particles up to 10 micrometers, like dust or pollen. They can irritate your airways and worsen allergies or asthma.
Ozone (O3)Good
17 Āµg/mĀ³
Elevated levels irritate airways and can worsen asthma symptoms.
Nitrogen Dioxide (NO2)Good
16.7 Āµg/mĀ³
A respiratory irritant from vehicle exhaust that can trigger inflammation in sensitive airways.
Sulfur Dioxide (SO2)Good
0.2 Āµg/mĀ³
Even brief exposure can tighten airways, especially for people with asthma.
Carbon Monoxide (CO)Good
139 Āµg/mĀ³
High levels reduce oxygen delivery in the body, compounding breathing difficulty on high-pollen days.
See the full Boise air quality report ā†’

Weather in Boise Today

šŸŒ¤ļø
Weather
62Ā°F
Overcast
Humidity
48%
Wind
5 mph E
Feels Like
57Ā°F
Pressure
1016 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Pollen shifts week to week in Boise. 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 Idaho ā†’

Get free daily pollen alerts

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

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Allergy Guides and Resources

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

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