Pollen Count in Grantham
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Grantham gets pollen from trees, grass, and weeds. Trees like oak, ash, and birch make pollen in spring. It starts in February and ends in May.
Updated: 4/8/2026
Grass pollen happens in late spring and early summer. June and July are the worst months. Pollen counts are high on sunny, windy days.
Weeds like ragwort and nettle make pollen in late summer. August and September are the peak months. Pollen counts are lower on rainy days.
Pollen counts change throughout the day. They are usually higher in morning and early afternoon. People can check pollen forecasts to plan their day.
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 Grantham 🌾. 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 | 6.1 | 0 | 0 | 0 | 0 | 0 |
| Mar | 80.7 | 45 | 0 | 0 | 0 | 0 |
| Apr | 13.9 | 757.8 | 1 | 0 | 0 | 0 |
| May | 0.2 | 61.5 | 78.6 | 0 | 0 | 0 |
| Jun | 0 | 0 | 1602.2 | 10.9 | 0.1 | 0 |
| Jul | 0 | 0.1 | 619.8 | 77 | 0 | 0 |
| Aug | 0 | 0 | 85.6 | 19 | 0 | 0 |
| Sep | 0 | 0 | 3.2 | 0.1 | 0 | 0.4 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(18 km)