Grass Pollen Count in Lake Oswego, OR — Today

Pollen by type in Lake Oswego

• Lake Oswego tree pollen count
• Lake Oswego ragweed pollen count
• Lake Oswego pollen count

What is the grass pollen count in Lake Oswego today?

The Lake Oswego 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.

Lake Oswego’s overall pollen count today is 10 (Low) across all types. See the full Lake Oswego pollen count for the overall index and every type together.

Lake Oswego is a city spanning Clackamas County and Multnomah County in Oregon. Its population is 40,367 (ACS 2023).

Lake Oswego 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 Lake Oswego’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Lake Oswego’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 Lake Oswego 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 Pacific Northwest pattern, the plants that typically shape this city’s year are spring trees and late-spring grasses in the Pacific Northwest pattern.

The Oregon allergy season guide singles out alder and hazelnut early, then the Willamette Valley’s seed grasses.

Plants affecting Lake Oswego now — grass pollen

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

In the Pacific Northwest pattern, the plants that typically shape this city’s year are spring trees and late-spring grasses in the Pacific Northwest pattern — 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, peaking in late spring and early summer. This month sits outside the usual grass pollen window for the Pacific Northwest pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Oregon allergy season guide singles out alder and hazelnut early, then the Willamette Valley’s seed grasses.

Lake Oswego allergies today

Lake Oswego allergies today are set by the same reading as the Lake Oswego pollen count today: the Total Pollen Index is 10 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Lake Oswego allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Lake Oswego.

Allergies in Lake Oswego follow the Oregon calendar set out on the full Lake Oswego 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 Lake Oswego 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 Lake Oswego allergy forecast for the grass pollen season: it shows whether Lake Oswego 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.