Tree Pollen Count in Rock Island, IL — Today

Updated Saturday, November 7, 2026

Pollen by type in Rock Island

What is the tree pollen count in Rock Island today?

The Rock Island 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.

Rock Island’s overall pollen count today is 19 (Low) across all types. See the full Rock Island pollen count for the overall index and every type together.

Rock Island is a city in Rock Island County, Illinois. Its population is 36,758 (ACS 2023).

Rock Island Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 719Low
Sunday, November 819Low
Monday, November 918Low
Tuesday, November 1018Low
Wednesday, November 1118Low

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

Species driving Rock Island’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 Rock Island now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Rock Island. 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. The Illinois allergy season guide singles out the classic tree, grass and ragweed sequence at full strength, with mold as a Chicago co-headliner.

Rock Island allergies today

Rock Island allergies today are set by the same reading as the Rock Island pollen count today: the Total Pollen Index is 19 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Rock Island allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Rock Island.

Allergies in Rock Island follow the Illinois calendar set out on the full Rock Island 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 Rock Island 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 Rock Island allergy forecast for the tree pollen season: it shows whether Rock Island 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 Rock Island pollen count — all types, the overall index and today’s ranking context

Rock Island grass pollen count

Rock Island ragweed pollen count

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

See Rock Island on the pollen map

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

Illinois allergy season guide

Tree pollen season

Find an allergist in Rock Island, IL

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).