| 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 | 669 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 36 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 1 |
| February | 1,717 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 74 (High) | 0 (Low) | 84 (High) | 2 (Low) | 255 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 1 | 2 |
| March | 388 (Very high) | 315 (Very high) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 31 (Medium) | 8 (Low) | 4 (Low) | 178 (Very high) | 0 (Low) | 14 (Low) | 3 (Low) | 2 (Low) | 14 (Low) | 39 | 6 |
| April | 14 (Low) | 457 (Very high) | 12 (Low) | 17 (Low) | 4 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 304 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 114 (Very high) | 1 (Low) | 42 (Medium) | 26 (Medium) | 1 (Low) | 122 (Very high) | 6 (Low) | 9 (Low) | 6 (Low) | 9 | 9 |
| May | 18 (Low) | 10 (Low) | 230 (Very high) | 15 (Low) | 326 (High) | 1 (Low) | 16 (Medium) | 0 (Low) | 202 (Very high) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 94 (High) | 1 (Low) | 5 (Low) | 223 (Very high) | 12 (Low) | 2 (Low) | 6 (Low) | 12 | 3 |
| June | 9 (Low) | 1 (Low) | 131 (High) | 25 (Medium) | 29 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 34 (Medium) | 7 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 68 (High) | 0 (Low) | 5 (Low) | 18 (Medium) | 21 (Medium) | 0 (Low) | 14 (Low) | 16 | 4 |
| July | 1 (Low) | 1 (Low) | 58 (Medium) | 6 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 32 (Medium) | 4 (Low) | 1 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 12 (Low) | 3 (Low) | 2 (Low) | 7 (Low) | 16 | 12 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 21 (Medium) | 7 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 1 |
| September | 3 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 36 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| October | 2 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 9 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| December | 13 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 2 |