Tree Pollen Count in Thunder Bay, ON

Pollen by type in Thunder Bay

• Thunder Bay grass pollen count
• Thunder Bay ragweed pollen count
• Thunder Bay pollen count

What is the tree pollen count in Thunder Bay today?

The Thunder Bay 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.

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

Thunder Bay is in Thunder Bay District, Ontario, Canada. Its population is 108,843 (GeoNames).

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

Species driving Thunder Bay’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 Thunder Bay now — tree pollen

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

In the Midwest & Great Lakes pattern, the plants that typically shape this city’s year are spring trees, late-spring and summer grasses, and late-summer and autumn ragweed — 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.

Trees run from March into May, later near the big lakes. This month sits outside the usual tree pollen window for the Midwest & Great Lakes pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. No Ontario allergy season guide is published yet, so the seasonal context here follows the Midwest & Great Lakes regional pattern.

Thunder Bay allergies today

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

Allergies in Thunder Bay follow the Ontario calendar set out on the full Thunder Bay 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 Thunder Bay 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 Thunder Bay allergy forecast for the tree pollen season: it shows whether Thunder Bay 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.