Hemel Hempstead pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Hemel Hempstead are low. Grass is the main contributor to airborne pollen

On 17 July 2026, pollen conditions in Hemel Hempstead will be similar to today, with grass at low levels

According to the five-day outlook, artemisia, cypress, and grass pollen levels will increase later in the week.

On 16 July 2026, Grass is the dominant pollen source in Hemel Hempstead. artemisia, birch, hazel, cypress, willow, and alder are not currently active.

So here's the rundown for Hemel Hempstead: oak pollen shows up first, then plane takes over. Expect oak pollen roughly from April to May, then plane carries on from April until June. Don't forget grass, either — it runs May to September and usually causes the most trouble in June and July. Something to plan around if pollen usually gets to you.

The Hemel Hempstead 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 Hemel Hempstead, 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.