| 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 | 234 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| February | 275 (Very high) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 125 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 66 (High) | 1 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 | 0 |
| March | 548 (Very high) | 1 (Low) | 13 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 32 (Medium) | 2 (Low) | 287 (Very high) | 1 (Low) | 17 (Medium) | 14 (Low) | 3 (Low) | 9 (Low) | 0 | 1 |
| April | 18 (Low) | 1,743 (Very high) | 22 (Low) | 18 (Low) | 10 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 112 (Very high) | 1 (Low) | 30 (Medium) | 53 (High) | 2 (Low) | 505 (Very high) | 17 (Medium) | 7 (Low) | 38 (Medium) | 1 | 1 |
| May | 17 (Low) | 87 (Medium) | 324 (Very high) | 29 (Medium) | 227 (High) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 8 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 85 (High) | 1 (Low) | 8 (Low) | 714 (Very high) | 24 (Medium) | 2 (Low) | 9 (Low) | 8 | 2 |
| June | 29 (Low) | 7 (Low) | 282 (Very high) | 24 (Medium) | 463 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 18 (Medium) | 4 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 208 (Very high) | 1 (Low) | 3 (Low) | 218 (Very high) | 41 (Medium) | 0 (Low) | 8 (Low) | 9 | 1 |
| July | 11 (Low) | 2 (Low) | 41 (Medium) | 5 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 6 (Low) | 36 (Medium) | 3 (Low) | 1 (Low) | 7 (Low) | 29 | 2 |
| August | 3 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 15 (Medium) | 20 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 10 | 2 |
| September | 2 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 28 (Medium) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 | 1 |
| October | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| November | 131 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| December | 30 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |