Pollen Count in Hatfield
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In Hatfield, tree pollen starts in late March. Trees like oak, ash, and birch release pollen. This makes spring air yellow and cloudy.
Updated: 6/14/2026
Grass pollen season begins in May. It's the worst time for people who are sensitive. Pollen counts are usually highest in the morning.
Weed pollen happens in summer. Nettle and dock plants make a lot of pollen. This season usually ends in July.
In autumn, some trees and weeds still make pollen. This continues until October. Then pollen counts go down, and the air gets cleaner.
Pollen Forecast Chart
Recommendations
When pollen concentrations reach a peak, we suggest these simple steps to help with hay fever. These tips are extra important on windy days when plants are in peak anthesis (the time when they release the most pollen).
- Wear masks if necessary
- Shower after going out
- Wear sunglasses if windy
- Close windows and doors
- Use an indoor air purifier
- Avoid wearing woolen clothes outside
- Limit outdoor activities
Annual Pollen Overview
Check out this month-by-month overview of the daily average pollen count in Hatfield 🌾. This data is based on previous years and serves as a guideline to help you understand when different pollen seasons typically occur in your city.
| Alder | Birch | Grass | Mugwort | Olive | Ragweed | |
|---|---|---|---|---|---|---|
| Jan | 0 | 0 | 0 | 0 | 0 | 0 |
| Feb | 21.8 | 0 | 0 | 0 | 0 | 0 |
| Mar | 167.7 | 44.5 | 0 | 0 | 0 | 0 |
| Apr | 10.8 | 743.8 | 0.6 | 0 | 0 | 0 |
| May | 0.1 | 67.2 | 62.2 | 0 | 0 | 0 |
| Jun | 0 | 0 | 1296.9 | 16.1 | 0 | 0 |
| Jul | 0 | 0.1 | 501.7 | 98.4 | 0 | 0 |
| Aug | 0 | 0 | 85 | 27 | 0 | 0 |
| Sep | 0 | 0 | 3.7 | 0.2 | 0 | 0.3 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(10 km)