North Dakota, United States

Williston, ND Pollen Count Today

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

Today's pollen count in Williston

Today in Williston, North Dakota, the forecasted pollen level is low with an allergy index of 2. The primary allergen is Ash. 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 Williston. Actual exposure can vary by neighborhood, weather, and time outdoors.

Current level
Low
Allergy index
2
Main allergen
Ash

Pollen Level

Low Risk
2

Pollen Index

Primary Allergen

Ash

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 9:13 AM ET.

Check pollen in another city or ZIP code

5-Day Pollen Forecast

Best day this week

Sun - Very Low

Worst day this week

Sat - Low

Today
81°/59°
2
Low
Tree2
Grass0
Weed0
Tomorrow
81°/59°
2
Low
Tree2
Grass0
Weed0
Fri
81°/59°
2
Low
Tree2
Grass0
Weed0
Sat
81°/59°
2
Low
Tree2
Grass0
Weed0
Sun
78°/57°
1
Very Low
Tree1
Grass0
Weed0
None
Very Low
Low
Moderate
High
Very High

Allergen Breakdown

Ash
Low
Maple
Out of seasonVery Low
Oak
Very Low
Birch
None

Pollen & Allergy Guide for Williston, ND

Williston, North Dakota 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 Williston?

Allergy season in Williston 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 Williston

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.

Williston 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 Williston

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 Williston

What is the pollen count in Williston today?

Today in Williston, North Dakota, the pollen level is low with an allergy index of 2. The main allergen to watch is Ash.

When is allergy season in Williston, North Dakota?

Allergy season in Williston, North Dakota 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 Williston?

If you have seasonal allergies in Williston, 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 Williston, North Dakota?

Williston 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.