| 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 | 1,625 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 2 |
| February | 2,279 (Very high) | 0 (Low) | 17 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 105 (Very high) | 0 (Low) | 574 (Very high) | 2 (Low) | 104 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 | 13 |
| March | 1,689 (Very high) | 9,511 (Very high) | 35 (Medium) | 6 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 224 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 15 (Medium) | 167 (Very high) | 398 (Very high) | 410 (Very high) | 759 (Very high) | 0 (Low) | 209 (Very high) | 9 (Low) | 18 (Medium) | 32 (Medium) | 22 | 12 |
| April | 55 (Medium) | 3,887 (Very high) | 36 (Medium) | 32 (Medium) | 75 (Medium) | 37 (Medium) | 1 (Low) | 0 (Low) | 33 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 186 (Very high) | 2 (Low) | 201 (Very high) | 34 (Medium) | 1 (Low) | 1,830 (Very high) | 7 (Low) | 18 (Medium) | 26 (Medium) | 16 | 12 |
| May | 22 (Low) | 6 (Low) | 126 (High) | 45 (Medium) | 501 (Very high) | 1 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 679 (Very high) | 0 (Low) | 10 (Low) | 552 (Very high) | 9 (Low) | 2 (Low) | 20 (Medium) | 34 | 7 |
| June | 15 (Low) | 5 (Low) | 37 (Medium) | 5 (Low) | 56 (Medium) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 62 (High) | 0 (Low) | 7 (Low) | 47 (Medium) | 3 (Low) | 0 (Low) | 7 (Low) | 8 | 4 |
| July | 4 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 32 (Medium) | 0 (Low) | 15 (Medium) | 11 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 8 | 4 |
| August | 1 (Low) | 1 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 20 (Medium) | 16 (Medium) | 0 (Low) | 0 (Low) | 5 (Low) | 10 | 3 |
| September | 2 (Low) | 2 (Low) | 12 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 16 (Medium) | 8 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 3 |
| October | 16 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| November | 4 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| December | 59 (Medium) | 0 (Low) | 1 (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) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |