Great Falls, MT · Montana

Great Falls, MT Pollen Count Today

View today's allergy index, primary allergen, weather context, 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 high with an allergy index of 4. The primary allergen is Ragweed. 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.

Pollen Level

High Risk
4

Google UPI (0–5)

Primary Allergen

Ragweed

Limit outdoor exposure. Take allergy medication and monitor symptoms closely.

81°

Temp

61%

Humidity

16

Wind mph

Pollen: Includes data from Google Maps · Weather: AllergyAva estimated fallback

5-Day Pollen Forecast

Best day this week

Mon - High

Worst day this week

Fri - High

Mon
87°/63°
4
High
Tree0
Grass0
Weed4
Today
87°/63°
4
High
Tree0
Grass0
Weed4
Tomorrow
87°/63°
4
High
Tree0
Grass0
Weed4
Thu
87°/63°
4
High
Tree0
Grass0
Weed4
Fri
87°/63°
4
High
Tree0
Grass0
Weed4
None
Very Low
Low
Moderate
High
Very High

Allergen Breakdown

Ragweed
High

Ava Personal Risk

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Weather-allergy synergy

Why conditions feel this way today

Today in Great Falls, 16 mph wind can actively disperse ragweed pollen. Keeping windows closed is a practical move during peak outdoor hours.

Temp
81°F
Humidity
61%
Wind
16 mph
Rain chance
32%

24-hour allergy risk curve

Best outdoor window today in Great Falls

Planning estimate
11 AM: Very High12 PM: Very High1 PM: Very High2 PM: Very High3 PM: Very High4 PM: Very High5 PM: Very High6 PM: Very High7 PM: High8 PM: High9 PM: High10 PM: High11 PM: High12 AM: High1 AM: High2 AM: High3 AM: High4 AM: High5 AM: Very High6 AM: Very High7 AM: Very High8 AM: Very High9 AM: Very High10 AM: Very High

Better

No clearly better outdoor window while alerts, storm risk, or strong wind are present.

Avoid

Storm periods, gust fronts, and exposed outdoor areas.

Extra caution

Stay indoors during storms, especially if pollen or asthma affects your breathing.

Data Confidence & Sources

Pollen Forecast

Source
Includes data from Google Maps · Pollen API (1×1 km grid resolution)
Last Daily Update

Pollen models recalculate once daily

Weather Conditions

Source
AllergyAva estimated weather fallback
Last Refresh

Weather data updates every 15–30 minutes

Local pollen exposure can vary by micro-vegetation, wind gusts, structural barriers, and time spent outdoors.

Check pollen in another city or ZIP code

Local allergy care

Allergists near Great Falls, MT

Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.

View all 2

City allergy guide

Great Falls allergy profile

Today's risk+

Great Falls allergy conditions are shaped by local weather, seasonal vegetation, and short-term changes in wind, rain, humidity, and temperature. Tree pollen is usually more important in spring, grass pollen often builds from late spring into summer, and weed pollen can become more noticeable later in the year.

Use today's pollen index alongside the 5-day forecast to plan commutes, outdoor exercise, yard work, and window-open time in Great Falls. Conditions can still vary by neighborhood, nearby plants, and time spent outdoors.

Great Falls's guide sections below focus on recurring local exposure patterns. For today, treat the high Ragweed reading as the live risk signal and use the weather card above for short-term wind, humidity, and rain context.

Seasonal guide+

Spring

Tree pollen

Often drives early-season symptoms

Late spring to summer

Grass pollen

Can rise around lawns, parks, and open areas

Late summer to fall

Ragweed/weed pollen

Major fall allergy trigger

Varies

Mold spores

Often affected by moisture and decaying leaves

Treatment and planning tips+

Track the forecast

Check Great Falls pollen levels daily during active allergy periods.

Reduce indoor exposure

Keep windows closed on high-pollen days and use HVAC or HEPA filtration when appropriate.

Plan medication timing

Follow your clinician's or product-label instructions, especially before your usual peak season.

Great Falls seasonal pollen calendar

Tree pollen

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

In season now

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 high with an allergy index of 4. The main allergen to watch is Ragweed.

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.