Pollen Count in Lille
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Lille, France has high levels of pollen in the air during certain times of the year. This causes allergic reactions in some people.
Updated: 2/11/2026
Tree pollen is the main culprit in Lille from mid-March to mid-May. Birch, oak, and hazel trees are the most likely to trigger allergies.
Grass pollen is a problem from mid-May to mid-July. This type of pollen is more common in open areas like parks and fields.
Weeds like nettle and sorrel release pollen from mid-July to mid-September. This is the final peak pollen season in Lille before winter.
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 Lille 🌾. 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 | 12.3 | 0 | 0 | 0 | 0 | 0 |
| Mar | 241.6 | 61.4 | 0 | 0 | 0 | 0 |
| Apr | 2.4 | 1325.1 | 24 | 0 | 0 | 0 |
| May | 0.6 | 84.1 | 153.7 | 0 | 2.2 | 0 |
| Jun | 0 | 0 | 864.3 | 85.2 | 0.4 | 0 |
| Jul | 0 | 0.1 | 348.9 | 605.7 | 0 | 0 |
| Aug | 0 | 0 | 87.4 | 151.2 | 0 | 0.4 |
| Sep | 0 | 0 | 8.9 | 12.8 | 0 | 1.2 |
| Oct | 0 | 0 | 0.8 | 1.1 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(16 km)