| 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 | 754 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 42 (Medium) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| February | 167 (High) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 1 (Low) | 49 (Medium) | 1 (Low) | 18 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 1 | 1 |
| March | 537 (Very high) | 256 (High) | 6 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 26 (Medium) | 108 (Very high) | 37 (Medium) | 52 (High) | 468 (Very high) | 1 (Low) | 26 (Medium) | 1 (Low) | 7 (Low) | 9 (Low) | 4 | 7 |
| April | 31 (Medium) | 366 (Very high) | 11 (Low) | 36 (Medium) | 16 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 258 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 729 (Very high) | 5 (Low) | 115 (Very high) | 6 (Low) | 5 (Low) | 433 (Very high) | 9 (Low) | 7 (Low) | 11 (Low) | 8 | 3 |
| May | 32 (Medium) | 4 (Low) | 250 (Very high) | 47 (Medium) | 205 (High) | 2 (Low) | 0 (Low) | 0 (Low) | 92 (High) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 51 (High) | 1 (Low) | 4 (Low) | 673 (Very high) | 7 (Low) | 3 (Low) | 6 (Low) | 7 | 5 |
| June | 38 (Medium) | 1 (Low) | 49 (Medium) | 17 (Low) | 42 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 26 (Medium) | 10 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 62 (High) | 0 (Low) | 5 (Low) | 54 (High) | 5 (Low) | 0 (Low) | 11 (Low) | 9 | 3 |
| July | 2 (Low) | 0 (Low) | 37 (Medium) | 5 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 7 (Low) | 21 | 7 |
| August | 1 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 21 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 50 | 1 |
| September | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 8 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 7 | 1 |
| October | 7 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (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) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 2 |
| November | 42 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |
| December | 279 (Very high) | 0 (Low) | 1 (Low) | 0 (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) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 | 3 |