Ragweed Pollen Count in DeKalb, IL — Today

Pollen by type in DeKalb

• DeKalb tree pollen count
• DeKalb grass pollen count
• DeKalb pollen count

What is the ragweed pollen count in DeKalb today?

The DeKalb ragweed pollen index today is 37 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in DeKalb today. See the full DeKalb pollen count for the overall index and every type together.

DeKalb is a city in DeKalb County, Illinois. Its population is 40,464 (ACS 2023).

DeKalb Ragweed 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 DeKalb’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving DeKalb’s ragweed 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: ragweed pollen reads 37 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

How to read this: the “ragweed” figure on this site is the modelled weed pollen index — the weed group (ragweed + mugwort) — printed under the ragweed name the rankings use.

Plants affecting DeKalb now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for DeKalb. The type summary stands: ragweed pollen reads 37 (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 ragweed pollen level means

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

Enjoy outdoor activities.

Ragweed builds from mid-August, peaks in September, and ends at the first frost. This month sits outside the usual ragweed pollen window for the Midwest & Great Lakes pattern, so today’s ragweed 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.

DeKalb allergies today

DeKalb allergies today are set by the same reading as the DeKalb pollen count today: the Total Pollen Index is 28 (Low), and the ragweed pollen index on this page is 37 (Low) of it. When people ask about DeKalb allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for DeKalb.

Allergies in DeKalb follow the Illinois calendar set out on the full DeKalb 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 DeKalb before heading outdoors, the ragweed 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 DeKalb allergy forecast for the ragweed pollen season: it shows whether DeKalb 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.