Pollen Count in Sydenham
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Sydenham has pollen seasons. Trees release pollen in spring. Oak, ash, and hazel trees make lots of pollen. This happens from March to May.
Updated: 4/26/2026
Grass pollen season starts in late spring. It lasts until July. Grasses release pollen when it's warm and sunny. This makes pollen counts go up.
Weeds release pollen in late summer. Dock, nettle, and plantain make pollen. This season goes from August to October. Pollen counts can still be high.
Winter months have low pollen counts. Trees don't release much pollen then. It's a good time for people to relax outside. Pollen counts stay low until March.
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 Sydenham 🌾. 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 | 0.5 | 0 | 0 | 0 | 0 | 0 |
| Mar | 112.3 | 1.9 | 0 | 0 | 0 | 0 |
| Apr | 29.6 | 165.3 | 0.3 | 0 | 0 | 0 |
| May | 0.1 | 33.6 | 22.6 | 0 | 0 | 0 |
| Jun | 0 | 0 | 298.3 | 0.3 | 0 | 0 |
| Jul | 0 | 0.1 | 168 | 4.4 | 0 | 0 |
| Aug | 0 | 0 | 26 | 1 | 0 | 0 |
| Sep | 0 | 0 | 0.9 | 0 | 0 | 0.1 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(3 km)