Pollen Count in Gloucester
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Gloucester has three main pollen seasons. Tree pollen starts in March and April. Trees like oak, ash, and hazel release pollen. This makes spring air yellow.
Updated: 4/8/2026
Grass pollen season starts in May and June. Grass pollen is very high during this time. People notice more pollen on cars and surfaces.
Weed pollen season happens in late summer. Plants like ragweed and nettle release pollen. This season usually ends in September.
Pollen levels can change each year. Weather affects how much pollen is in the air. Rain can wash pollen away. Warm weather makes pollen increase.
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 Gloucester 🌾. 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 | 18.9 | 0 | 0 | 0 | 0 | 0 |
| Mar | 231.6 | 36.6 | 0 | 0 | 0 | 0 |
| Apr | 90.3 | 1299.2 | 4 | 0 | 0 | 0 |
| May | 0.2 | 44.7 | 95.3 | 0 | 0.2 | 0 |
| Jun | 0 | 0 | 1116.9 | 15.8 | 0.1 | 0 |
| Jul | 0 | 0.1 | 726 | 128 | 0 | 0 |
| Aug | 0 | 0 | 92.8 | 25 | 0 | 0.1 |
| Sep | 0 | 0 | 3.5 | 0.1 | 0 | 0.9 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(11 km)