| 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 | 92 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| February | 131 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 26 (Medium) | 0 (Low) | 77 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 | 4 |
| March | 179 (High) | 5 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 25 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 39 (Medium) | 5 (Low) | 50 (High) | 1 (Low) | 640 (Very high) | 0 (Low) | 5 (Low) | 2 (Low) | 4 (Low) | 18 (Medium) | 11 | 5 |
| April | 23 (Low) | 494 (Very high) | 20 (Low) | 27 (Medium) | 33 (Low) | 25 (Medium) | 1 (Low) | 1 (Low) | 135 (Very high) | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 9 (Low) | 153 (Very high) | 1 (Low) | 171 (Very high) | 41 (Medium) | 8 (Low) | 510 (Very high) | 21 (Medium) | 4 (Low) | 13 (Low) | 20 | 23 |
| May | 75 (Medium) | 18 (Low) | 344 (Very high) | 36 (Medium) | 268 (High) | 1 (Low) | 19 (Medium) | 0 (Low) | 155 (Very high) | 0 (Low) | 10 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 61 (High) | 1 (Low) | 4 (Low) | 138 (Very high) | 33 (Medium) | 3 (Low) | 12 (Low) | 31 | 10 |
| June | 29 (Low) | 4 (Low) | 173 (Very high) | 22 (Medium) | 404 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 86 (High) | 0 (Low) | 15 (Medium) | 12 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 71 (High) | 0 (Low) | 6 (Low) | 98 (High) | 24 (Medium) | 0 (Low) | 9 (Low) | 32 | 9 |
| July | 1 (Low) | 0 (Low) | 13 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 13 | 1 |
| August | 1 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 16 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 25 | 3 |
| September | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 22 (Medium) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 4 |
| October | 18 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 69 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 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) | 1 | 2 |
| December | 42 (Medium) | 0 (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) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |