Tree Pollen Count in Forreston, IL
Last updated Friday, November 6, 2026
This page shows the most recent reading available for Forreston — from Friday, November 6, 2026 (1 day ago) — not today's reading.
Pollen by type in Forreston
What is the tree pollen count in Forreston today?
The Forreston 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.
Forreston’s overall pollen count today is 29 (Low) across all types. See the full Forreston pollen count for the overall index and every type together.
Forreston Tree Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Friday, November 6 | 29 | Low |
| Saturday, November 7 | 28 | Low |
| Sunday, November 8 | 28 | Low |
| Monday, November 9 | 28 | Low |
| Tuesday, November 10 | 28 | Low |
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 Forreston’s overall trend across the week. Today’s tree pollen reading is the headline above.
Species driving Forreston’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 Forreston now — tree pollen
Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Forreston. 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.
Forreston allergies today
Forreston allergies today are set by the same reading as the Forreston pollen count today: the Total Pollen Index is 29 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Forreston allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Forreston.
Allergies in Forreston follow the Illinois calendar set out on the full Forreston 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 Forreston 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 Forreston allergy forecast for the tree pollen season: it shows whether Forreston 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 Forreston pollen count — all types, the overall index and today’s ranking context
Forreston ragweed pollen count
See how Forreston ranks in today's pollen count rankings — the worst cities for allergies today
See Forreston on the pollen map
Every pollen type, with photos and seasons: the pollen directory
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).