Montana, United States

Great Falls, MT Pollen Count Today

View the current allergy index, primary allergen, tree, grass, and weed pollen levels, plus the 5-day pollen forecast for Great Falls.

Today's pollen count in Great Falls

Today in Great Falls, Montana, the forecasted pollen level is low with an allergy index of 2. The primary allergen is Pine. Use the forecast below to see whether conditions are likely to rise, ease, or stay steady over the next few days.

AllergyAva shows forecasted pollen levels and allergy risk estimates for Great Falls. Actual exposure can vary by neighborhood, weather, and time outdoors.

Current level
Low
Allergy index
2
Main allergen
Pine

Pollen Level

Low Risk
2

Pollen Index

Primary Allergen

Pine

Air quality is good. Enjoy outdoor activities with minimal allergy concerns.

72°

Temp

55%

Humidity

8

Wind mph

Source: Includes pollen data from Google

Updated May 13, 2026 at 10:18 AM ET.

Check pollen in another city or ZIP code

5-Day Pollen Forecast

Best day this week

Today - Low

Worst day this week

Sat - Moderate

Today
81°/59°
2
Low
Tree1
Grass2
Weed0
Tomorrow
81°/59°
2
Low
Tree1
Grass2
Weed0
Fri
81°/59°
2
Low
Tree1
Grass2
Weed0
Sat
84°/61°
3
Moderate
Tree1
Grass3
Weed0
Sun
81°/59°
2
Low
Tree1
Grass2
Weed0
None
Very Low
Low
Moderate
High
Very High

Allergen Breakdown

Grasses
Out of seasonLow
Pine
Very Low
Birch
None
Oak
None

Pollen & Allergy Guide for Great Falls, MT

Great Falls, Montana residents can experience significant pollen exposure throughout the year. Tree pollen typically peaks during spring months, while grass pollen dominates in summer. Fall brings elevated ragweed levels, which is one of the most common allergens in the region.

When Is Allergy Season in Great Falls?

Allergy season in Great Falls generally begins in early spring as trees start releasing pollen. The most intense period varies by allergen type. Monitoring daily pollen counts with Allergy Ava helps you plan ahead and manage symptoms proactively.

Tips for Managing Allergies in Great Falls

Track your daily pollen exposure, consult with a local allergist for personalized treatment, and consider starting preventive medications 2-4 weeks before your peak allergy season. Indoor air quality management with HEPA filters can also make a significant difference.

Great Falls allergy season calendar

Tree pollen

In season now

Spring

Often drives early-season symptoms

Grass pollen

In season now

Late spring to summer

Can rise around lawns, parks, and open areas

Ragweed/weed pollen

Late summer to fall

Major fall allergy trigger

Mold spores

Varies

Often affected by moisture and decaying leaves

Common pollen triggers around Great Falls

TriggerTypical seasonWhat to know
Tree pollenSpringOften drives early-season symptoms
Grass pollenLate spring to summerCan rise around lawns, parks, and open areas
Ragweed/weed pollenLate summer to fallMajor fall allergy trigger
Mold sporesVariesOften affected by moisture and decaying leaves

Frequently asked questions about pollen in Great Falls

What is the pollen count in Great Falls today?

Today in Great Falls, Montana, the pollen level is low with an allergy index of 2. The main allergen to watch is Pine.

When is allergy season in Great Falls, Montana?

Allergy season in Great Falls, Montana can vary by allergen and weather conditions. Tree pollen often rises in spring, grass pollen becomes more active in late spring and summer, and weed pollen can remain elevated later in the year depending on local climate and vegetation.

How often should I check the pollen forecast in Great Falls?

If you have seasonal allergies in Great Falls, it is helpful to check the pollen forecast daily during peak allergy periods. Shifts in wind, rainfall, temperature, and humidity can all change local pollen exposure from one day to the next.

What pollen types affect people in Great Falls, Montana?

Great Falls residents may be affected by tree pollen, grass pollen, and weed pollen during different parts of the year. The strongest trigger depends on the season, nearby vegetation, and current weather conditions.