Grass Pollen Count in Williston, ND

Pollen by type in Williston

• Williston tree pollen count
• Williston ragweed pollen count
• Williston pollen count

What is the grass pollen count in Williston today?

The Williston grass pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Grass pollen is the dominant allergen in Williston today. See the full Williston pollen count for the overall index and every type together.

Williston is a city in Williams County, North Dakota. Its population is 27,964 (ACS 2023).

Williston Grass Pollen Count: 5-Day Forecast

Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Williston’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Williston’s grass pollen

The modelled data reports grass as one combined index — there is no species-by-species split for grass anywhere in the data, so this page does not invent one. Today’s modelled grass index for Williston is 0.6 (Low), and the 5-day overall trend above shows the shape of the week.

As regional context only — not as today’s readings — in the Northern Plains pattern, the plants that typically shape this city’s year are river-corridor cottonwood, elm and ash in spring, summer grasses, and a divided fall — ragweed in the east, sagebrush in the west.

The North Dakota allergy season guide singles out ragweed, heaviest in the Red River Valley, over river cottonwood and town elm in late spring.

Plants affecting Williston now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Williston. The type summary stands: grass pollen reads 0.6 (Low) today.

In the Northern Plains pattern, the plants that typically shape this city’s year are river-corridor cottonwood, elm and ash in spring, summer grasses, and a divided fall — ragweed in the east, sagebrush in the west — named here as regional context only, not as today’s readings.

Plant detail returns here automatically on any day the feed includes it.

What this grass pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Grasses run from May into July, peaking in June and July. This month sits outside the usual grass pollen window for the Northern Plains pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The North Dakota allergy season guide singles out ragweed, heaviest in the Red River Valley, over river cottonwood and town elm in late spring.

Williston allergies today

Williston allergies today are set by the same reading as the Williston pollen count today: the Total Pollen Index is 5 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Williston allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Williston.

Allergies in Williston follow the North Dakota calendar set out on the full Williston page — the chapters, the plants behind them, and the 5-day forecast show whether today is typical for the season or an exception to it. If you are checking allergies today in Williston before heading outdoors, the grass pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.

Read the five-day overall trend above as the Williston allergy forecast for the grass pollen season: it shows whether Williston allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.