| 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 | 798 (Very high) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 45 (Medium) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 | 1 |
| February | 336 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 96 (High) | 0 (Low) | 82 (High) | 2 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 1 | 1 |
| March | 453 (Very high) | 2 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 8 (Low) | 31 (Medium) | 9 (Low) | 570 (Very high) | 0 (Low) | 32 (Medium) | 3 (Low) | 2 (Low) | 12 (Low) | 14 | 2 |
| April | 10 (Low) | 313 (Very high) | 16 (Low) | 15 (Low) | 5 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 651 (Very high) | 1 (Low) | 175 (Very high) | 16 (Medium) | 3 (Low) | 111 (Very high) | 10 (Low) | 26 (Medium) | 9 (Low) | 18 | 4 |
| May | 13 (Low) | 16 (Low) | 131 (High) | 54 (High) | 77 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 36 (Medium) | 1 (Low) | 23 (Medium) | 108 (Very high) | 15 (Medium) | 4 (Low) | 1 (Low) | 27 | 5 |
| June | 34 (Medium) | 2 (Low) | 133 (High) | 19 (Low) | 456 (Very high) | 1 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 5 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 78 (High) | 0 (Low) | 4 (Low) | 45 (Medium) | 12 (Low) | 1 (Low) | 10 (Low) | 25 | 5 |
| July | 29 (Low) | 2 (Low) | 94 (High) | 10 (Low) | 112 (Medium) | 1 (Low) | 44 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 5 (Low) | 1 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 52 (High) | 0 (Low) | 6 (Low) | 18 (Medium) | 3 (Low) | 0 (Low) | 13 (Low) | 10 | 19 |
| August | 1 (Low) | 1 (Low) | 4 (Low) | 3 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 43 | 2 |
| September | 6 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 25 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 6 | 1 |
| October | 26 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| December | 17 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (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) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |