| 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 | 152 (High) | 1 (Low) | 16 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 70 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 | 1 |
| February | 710 (Very high) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 86 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 126 (Very high) | 0 (Low) | 34 (Medium) | 4 (Low) | 48 (Medium) | 9 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 14 (Low) | 0 | 4 |
| March | 118 (High) | 357 (Very high) | 7 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 7 (Low) | 4 (Low) | 9 (Low) | 9 (Low) | 57 (High) | 0 (Low) | 8 (Low) | 4 (Low) | 5 (Low) | 39 (Medium) | 6 | 3 |
| April | 12 (Low) | 1,719 (Very high) | 15 (Low) | 76 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 102 (Very high) | 3 (Low) | 10 (Low) | 45 (Medium) | 3 (Low) | 82 (High) | 10 (Low) | 4 (Low) | 24 (Medium) | 7 | 4 |
| May | 10 (Low) | 72 (Medium) | 168 (Very high) | 106 (Very high) | 142 (Medium) | 14 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 39 (Medium) | 0 (Low) | 64 (High) | 1 (Low) | 4 (Low) | 268 (Very high) | 27 (Medium) | 6 (Low) | 24 (Medium) | 26 | 5 |
| June | 18 (Low) | 4 (Low) | 357 (Very high) | 84 (High) | 302 (High) | 5 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 17 (Medium) | 34 (Medium) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 153 (Very high) | 0 (Low) | 9 (Low) | 235 (Very high) | 57 (High) | 1 (Low) | 29 (Medium) | 36 | 4 |
| July | 3 (Low) | 3 (Low) | 113 (High) | 18 (Low) | 21 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 10 (Low) | 0 (Low) | 1 (Low) | 21 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 15 (Medium) | 24 (Medium) | 3 (Low) | 0 (Low) | 25 (Medium) | 13 | 3 |
| August | 4 (Low) | 2 (Low) | 13 (Low) | 9 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 18 (Medium) | 12 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 14 | 2 |
| September | 1 (Low) | 4 (Low) | 10 (Low) | 8 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 20 (Medium) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 | 1 |
| October | 19 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| November | 12 (Low) | 3 (Low) | 2 (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) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| December | 26 (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) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |