Pollen Count in Mountain Ash
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Trees and plants in Mountain Ash release pollen into the air at different times. This is called pollen season.
Updated: 2/25/2026
In the spring, trees like oak and birch release pollen from March to May. The pollen count is usually highest in April.
In the summer, grasses release pollen from May to July. This is the longest pollen season.
Weeds like nettle and sorrel release pollen in the late summer from July to September. Then, the pollen count goes back down.
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 Mountain Ash 🌾. 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 | 0.4 | 0 | 0 | 0 | 0 | 0 |
| Mar | 143.8 | 14 | 0 | 0 | 0 | 0 |
| Apr | 1144.7 | 1022.7 | 1 | 0 | 0 | 0 |
| May | 0.5 | 42.7 | 52.2 | 0 | 0.2 | 0 |
| Jun | 0 | 0 | 571.6 | 8.9 | 0 | 0 |
| Jul | 0 | 0.1 | 348.6 | 100.1 | 0 | 0 |
| Aug | 0 | 0 | 42.9 | 24.1 | 0 | 0.2 |
| Sep | 0 | 0 | 0.7 | 0.1 | 0 | 0.5 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(3 km)