Pollen Count in Olomouc
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Olomouc has four main pollen seasons. Tree pollen starts in March. Many trees release pollen then. It's a big problem for people.
Updated: 4/20/2026
Grass pollen starts in May. It's a very difficult time. Grasses release a lot of pollen. Many plants grow outside.
Ragweed pollen starts in July. It's a weed that grows everywhere. It makes a lot of pollen. This season ends in October.
Weed pollen continues in autumn. Some plants still release pollen then. Pollen levels decrease in winter. There are almost no plants growing then.
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 Olomouc 🌾. 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 | 0.9 | 0 | 0 | 0 | 0 | 0 |
| Feb | 123.7 | 0 | 0 | 0 | 0 | 0 |
| Mar | 4.1 | 1060.2 | 0.8 | 0 | 0 | 0 |
| Apr | 0.6 | 976.5 | 23.5 | 0 | 2.1 | 0 |
| May | 0 | 46.3 | 234.8 | 0 | 1.5 | 0 |
| Jun | 0 | 2 | 928.6 | 0 | 0.6 | 0 |
| Jul | 0 | 0.2 | 399.9 | 163 | 0 | 0.1 |
| Aug | 0 | 0 | 110.6 | 200 | 0 | 91.2 |
| Sep | 0 | 0 | 16.5 | 104.5 | 0 | 158 |
| Oct | 0 | 0 | 1 | 4.2 | 0 | 0.3 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(17 km)