Winnetka pollen forecast — Winnetka Golf Club neighborhood

On 30 August 2026, overall pollen levels in Winnetka are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 31 August 2026, pollen conditions in Winnetka will be different from today, with grass at moderate levels, ambrosia at high levels and artemisia increasing

According to the five-day outlook, grass, ambrosia, and artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

On 30 August 2026, Ambrosia is the dominant pollen source in Winnetka. grass and artemisia are also present but at lower levels. cypress are not currently active.

The waterside hazel and willow are consistently first to release pollen each year, leading off the pollen calendar, with a peak generally falling in late winter. Woodland oak and birch pick up the pace next, through mid-to-late spring, cresting around April and May in the year's sharpest tree-pollen spike. Late spring brings rising grass pollen that crests in June, before ragweed's late-summer surge carries the season into October.

The Winnetka pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Winnetka, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.