| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 88 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| February | 426 (Very high) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 126 (Very high) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| March | 108 (High) | 559 (Very high) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 25 (Medium) | 45 (Medium) | 14 (Low) | 22 (Medium) | 0 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 1 | 2 |
| April | 7 (Low) | 538 (Very high) | 10 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 36 (Medium) | 1 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 21 (Medium) | 3 (Low) | 1 (Low) | 2 (Low) | 2 | 2 |
| May | 1 (Low) | 0 (Low) | 29 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 50 (High) | 5 (Low) | 0 (Low) | 1 (Low) | 6 | 0 |
| June | 1 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 | 8 |
| July | 1 (Low) | 1 (Low) | 9 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 8 (Low) | 10 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 6 | 8 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 8 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 4 | 6 |
| September | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 | 4 |
| October | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |
| November | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 2 |
| December | 19 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |