Belvidere pollen forecast - today, tomorrow and the week ahead

On 9 August 2026, overall pollen levels in Belvidere are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels

On 10 August 2026, pollen conditions in Belvidere will be different from today, with artemisia at medium levels and grass, ambrosia increasing

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

On 9 August 2026, Ambrosia is the dominant pollen source in Belvidere. grass are also present but at lower levels. artemisia and cypress are not currently active.

Along the Spoon River, willow and alder are typically the first trees to shed pollen, with activity building through late winter into early March. By mid-spring, oak and other hardwoods near a local forest preserve take over, driving the year's heaviest tree pollen stretch across April and May. Similar timing shows up near the Illinois River and the natural areas around Rock Run Rookery Preserve, with only minor local variation.

The Belvidere 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 Belvidere, 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.