Pollen Count in Plymouth
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In Plymouth, there are three main pollen seasons. The first is tree pollen season. It starts in late March and lasts until mid-May. Trees like oak, birch, and hazel release pollen.
Updated: 3/23/2026
The second pollen season is grass pollen season. It starts in mid-May and lasts until July. Many different types of grasses release pollen during this time. This is usually the worst season for pollen.
The third and final pollen season is weed pollen season. It starts in late June and lasts until September. Weeds like nettles and sorrel release pollen during this time.
During these seasons, people with pollen allergies need to be careful. They should stay indoors on windy days and wash their clothes after being outside. They should also keep windows closed to keep pollen out.
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 Plymouth 🌾. 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 | 4.5 | 0 | 0 | 0 | 0 | 0 |
| Mar | 80.3 | 28.7 | 0.1 | 0 | 0 | 0 |
| Apr | 193.6 | 549.1 | 5.2 | 0 | 0 | 0 |
| May | 0.9 | 45.1 | 60.2 | 0 | 0.8 | 0 |
| Jun | 0 | 0 | 162.5 | 2.8 | 0.1 | 0 |
| Jul | 0 | 0 | 113 | 48.3 | 0 | 0 |
| Aug | 0 | 0 | 20.4 | 10.5 | 0 | 0.1 |
| Sep | 0 | 0 | 1.1 | 0.8 | 0 | 0.4 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(16 km)