Tree Pollen Count in Keystone, SD

Pollen by type in Keystone

• Keystone grass pollen count
• Keystone ragweed pollen count
• Keystone pollen count

What is the tree pollen count in Keystone today?

The Keystone 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.

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

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

Species driving Keystone’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 Keystone now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Keystone. The type summary stands: tree 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 tree pollen level means

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

Enjoy outdoor activities.

River-corridor elm, cottonwood and ash open from March in South Dakota, while North Dakota’s trees flower in late spring, in May. This month sits outside the usual tree pollen window for the Northern Plains pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The South Dakota allergy season guide singles out river-corridor cottonwood, elm and ash in spring, and a divided fall — ragweed in the east, sagebrush in the west.

Keystone allergies today

Keystone allergies today are set by the same reading as the Keystone 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 Keystone allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Keystone.

Allergies in Keystone follow the South Dakota calendar set out on the full Keystone 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 Keystone 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 Keystone allergy forecast for the tree pollen season: it shows whether Keystone 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.