Montana Pollen Count Today

Check today's pollen count by city in Montana. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.

Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.

Today's pollen count in Montana

Pollen levels in Montana can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Billings, Missoula, Bozeman, Great Falls, Helena, Butte-Silver Bow.

Today's statewide signal

Montana pollen count by city: mountain valleys, prairie grass, sagebrush, and dry wind

Montana allergy conditions vary by elevation, valley trapping, prairie wind, river corridors, forest cover, grassland, and late-season dryland weeds. Compare Billings, Missoula, Bozeman, Great Falls, Helena, Butte-Silver Bow, Kalispell, and Belgrade for local pollen levels, dominant allergens, weather context, and short-term trend signals.

Data updates regularly to reflect current conditions across Montana cities.

Highest city index now

Bozeman

Birch · Very High

Average pollen index: 4
Average humidity: 60%
Average wind: 13 mph

Live city comparison

Today's pollen and weather by city

Sort Montana cities by pollen index, temperature, or trend. Select a city for its full local forecast.

		Main allergen			Weather context
Bozeman	5Very High	Birch	Rising Forecast moves toward very high conditions tomorrow.	81°F	Breezy 17 mph wind can disperse birch pollen quickly today.
Great Falls	5Very High	Birch	Stable Tomorrow looks similar, near very low conditions.	81°F	Breezy 16 mph wind can disperse birch pollen quickly today.
Kalispell	5Very High	Birch	Falling Forecast eases toward very low conditions tomorrow.	81°F	Humid Humid air may keep birch and outdoor mold irritation active.
Belgrade	5Very High	Birch	Falling Forecast eases toward low conditions tomorrow.	81°F	Partly sunny 12 mph wind can disperse birch pollen quickly today.
Billings	4High	Birch	Falling Forecast eases toward very low conditions tomorrow.	81°F	Partly sunny Watch birch levels and limit long outdoor exposure during peak hours.
Missoula	4High	Birch	Falling Forecast eases toward moderate conditions tomorrow.	81°F	Partly sunny 14 mph wind can disperse birch pollen quickly today.
Helena	4High	Cedar	Falling Forecast eases toward very low conditions tomorrow.	81°F	Breezy 15 mph wind can disperse cedar pollen quickly today.
Butte-Silver Bow	3Moderate	Maple	Rising Forecast moves toward low conditions tomorrow.	81°F	Partly sunny Watch maple levels and limit long outdoor exposure during peak hours.

Bozeman

Birch is the main allergen

Very High

Pollen index

Trend

Rising

81°17 mph48%

17 mph wind can disperse birch pollen quickly today.

Great Falls

Birch is the main allergen

Very High

Pollen index

Trend

Stable

81°16 mph61%

16 mph wind can disperse birch pollen quickly today.

Kalispell

Birch is the main allergen

Very High

Pollen index

Trend

Falling

81°9 mph76%

Humid air may keep birch and outdoor mold irritation active.

Belgrade

Birch is the main allergen

Very High

Pollen index

Trend

Falling

81°12 mph65%

12 mph wind can disperse birch pollen quickly today.

Billings

Birch is the main allergen

High

Pollen index

Trend

Falling

81°8 mph68%

Watch birch levels and limit long outdoor exposure during peak hours.

Missoula

Birch is the main allergen

High

Pollen index

Trend

Falling

81°14 mph48%

14 mph wind can disperse birch pollen quickly today.

Helena

Cedar is the main allergen

High

Pollen index

Trend

Falling

81°15 mph56%

15 mph wind can disperse cedar pollen quickly today.

Butte-Silver Bow

Maple is the main allergen

Moderate

Pollen index

Trend

Rising

81°11 mph54%

Watch maple levels and limit long outdoor exposure during peak hours.

Regional allergy forecast

How Montana regions compare today

Billings and the eastern plains river-breaks zone

Billings allergy conditions are shaped by Yellowstone River cottonwoods, dry plains wind, prairie grasses, sagebrush country, roadside weeds, and dust. Pollen exposure can feel more irritating when wind lifts soil and plant debris.

CottonwoodGrassSagebrushRagweed

Index: 4
Humidity: 68%
Wind: 8

Missoula, Kalispell, and western mountain valleys

Western Montana valleys combine conifer and hardwood forests, river corridors, cooler nights, valley inversions, grass pollen, and damp pockets where mold can matter after rain or snowmelt.

BirchPineGrassMold

Index: 5
Humidity: 62%
Wind: 12

Bozeman, Belgrade, Helena, and southwest upland valleys

Southwest Montana cities sit in high-elevation valleys where spring can arrive unevenly. Foothill wind, cottonwood and willow corridors, irrigated lawns, grasses, and sagebrush-steppe weeds can all shift quickly with weather.

BirchCottonwoodGrassSagebrush

Index: 4
Humidity: 56%
Wind: 14

Great Falls and north-central Montana wind belt

Great Falls has a plains-and-river-corridor pattern with strong wind, grassland, shelterbelt trees, dryland weeds, and quick frontal changes. Moderate pollen counts can feel more intense during gusty conditions.

CottonwoodGrassRagweedKochia

Index: 5
Humidity: 61%
Wind: 16

State-specific pollen calendar

When major allergens are active in Montana

Trees

April to June

AprMayJun

Birch, cottonwood, willow, alder, ash, cedar or juniper, and pine can drive spring symptoms. Timing can vary sharply by elevation, valley warmth, snowmelt, and late cold snaps.

Grasses

June to August

JunJulAug

Bluegrass, timothy, orchard grass, fescue, brome, prairie grasses, hay fields, rangeland, lawns, and irrigated parks can raise summer pollen across both mountain valleys and plains cities.

Weeds

August to October

AugSepOct

Sagebrush, ragweed, wormwood, kochia, chenopods, pigweed, and other dryland or disturbed-ground weeds can drive late-season symptoms until colder weather and hard freezes arrive.

Winter lull

November to March

NovDecJanFebMar

Snow cover and hard freezes usually suppress outdoor pollen, but indoor dust, pet dander, wood smoke, mold in damp spaces, and inversion-related air irritation can still bother sensitive residents.

Weather-pollen correlation

What weather means for today's allergy risk

Wind can disperse pollen, rain can temporarily wash particles down, and humidity can increase mold irritation. The city table combines pollen and weather signals so users can compare outdoor risk without opening every city page.

Loading city data

Preparing today's Montana pollen dashboard

About Pollen in Montana

Montana allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.

Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.

Frequently asked questions about Montana pollen forecasts

Why can Montana pollen vary so much between cities?

Elevation, valley shape, wind exposure, snowmelt timing, river corridors, and local vegetation all matter. Missoula, Billings, Bozeman, and Great Falls can be in different allergy phases even during the same week.

Is sagebrush a real allergy trigger in Montana?

Yes. Sagebrush is different from ragweed, but both can contribute to late-season weed pollen symptoms. Sagebrush, wormwood, kochia, chenopods, and ragweed are most noticeable around dry open land, rangeland, roadsides, and disturbed soil.

Why do windy Montana days feel worse for allergies?

Dry wind can lift pollen, grass fragments, weed pollen, dust, and plant debris across long distances. That can make a day feel harsh even when the measured pollen count is not the highest of the season.

How is Billings different from Missoula or Kalispell?

Billings has more eastern plains, dry wind, grassland, and sagebrush influence. Missoula and Kalispell are more mountain-valley and forest influenced, with different tree timing, moisture, mold potential, and valley-trapping patterns.