Tree Pollen Count in Simms, MT

Last updated Friday, November 6, 2026

This page shows the most recent reading available for Simms — from Friday, November 6, 2026 (1 day ago) — not today's reading.

Pollen by type in Simms

What is the tree pollen count in Simms today?

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

Modelled pollen risk index — not a measured count.

Simms’s overall pollen count today is 5 (Low) across all types. See the full Simms pollen count for the overall index and every type together.

Simms Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 65Low
Saturday, November 75Low
Sunday, November 85Low
Monday, November 95Low
Tuesday, November 105Low

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 Simms’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Simms’s tree pollen

Species-level counts are not part of the modelled data Pollen Atlas publishes — the modelled index is reported per pollen type, not per species — so this section gives the type summary: tree pollen reads 0.6 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Simms now — tree pollen

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

In the Northern Rockies pattern, the plants that typically shape this city’s year are river-corridor trees, a June grass crest of timothy, orchard grass, bluegrass and ryegrass, and a late sagebrush finish — 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 tree pollen level means

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

Enjoy outdoor activities.

River-corridor trees open in late March or April, varying by valley elevation, and run into May. This month sits outside the usual tree pollen window for the Northern Rockies pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Montana allergy season guide singles out sagebrush, flowering late on the dry benches, over a grass summer of timothy, orchard grass, bluegrass and ryegrass.

Simms allergies today

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

Allergies in Simms follow the Montana calendar set out on the full Simms 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 Simms before heading outdoors, the tree 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 Simms allergy forecast for the tree pollen season: it shows whether Simms 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.

See the full Simms pollen count — all types, the overall index and today’s ranking context

Simms grass pollen count

Simms ragweed pollen count

See how Simms ranks in today's pollen count rankings — the worst cities for allergies today

See Simms on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Montana allergy season guide

Tree pollen season

Find an allergist in Simms, MT

Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).