| 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 | 87 (Medium) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| February | 102 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 53 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 | 1 |
| March | 277 (Very high) | 0 (Low) | 55 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 29 (Medium) | 6 (Low) | 10 (Low) | 2 (Low) | 100 (Very high) | 1 (Low) | 6 (Low) | 6 (Low) | 2 (Low) | 16 (Medium) | 13 | 2 |
| April | 2 (Low) | 0 (Low) | 16 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 10 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 2 (Low) | 5 (Low) | 7 | 1 |
| May | 21 (Low) | 7 (Low) | 182 (Very high) | 41 (Medium) | 134 (Medium) | 1 (Low) | 0 (Low) | 6 (Low) | 29 (Medium) | 0 (Low) | 4 (Low) | 6 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 4 (Low) | 78 (High) | 34 (Medium) | 0 (Low) | 14 (Low) | 44 | 4 |
| June | 112 (High) | 1 (Low) | 199 (Very high) | 35 (Medium) | 119 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 9 (Low) | 17 (Medium) | 1 (Low) | 6 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 224 (Very high) | 0 (Low) | 16 (Medium) | 116 (Very high) | 33 (Medium) | 0 (Low) | 16 (Medium) | 42 | 8 |
| July | 2 (Low) | 0 (Low) | 62 (Medium) | 14 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 22 (Medium) | 11 (Low) | 6 (Low) | 0 (Low) | 12 (Low) | 18 | 5 |
| August | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 17 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 13 | 2 |
| September | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 1 |
| October | 16 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| November | 18 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| December | 132 (High) | 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) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |