| 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 | 1,021 (Very high) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| February | 882 (Very high) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 75 (High) | 0 (Low) | 307 (Very high) | 1 (Low) | 29 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 8 (Low) | 1 | 4 |
| March | 1,315 (Very high) | 2,283 (Very high) | 15 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 176 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 1 (Low) | 31 (Medium) | 83 (High) | 32 (Medium) | 42 (Medium) | 427 (Very high) | 1 (Low) | 143 (Very high) | 8 (Low) | 17 (Medium) | 26 (Medium) | 12 | 22 |
| April | 92 (High) | 1,751 (Very high) | 32 (Medium) | 39 (Medium) | 37 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 157 (Very high) | 2 (Low) | 77 (High) | 60 (High) | 3 (Low) | 1,634 (Very high) | 12 (Low) | 22 (Medium) | 39 (Medium) | 33 | 31 |
| May | 29 (Low) | 6 (Low) | 206 (Very high) | 56 (High) | 528 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 116 (Very high) | 0 (Low) | 14 (Low) | 348 (Very high) | 12 (Low) | 1 (Low) | 10 (Low) | 15 | 31 |
| June | 25 (Low) | 1 (Low) | 45 (Medium) | 18 (Low) | 46 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 99 (High) | 0 (Low) | 10 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 33 (Medium) | 0 (Low) | 13 (Low) | 48 (Medium) | 5 (Low) | 0 (Low) | 6 (Low) | 12 | 18 |
| July | 2 (Low) | 0 (Low) | 11 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 11 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 10 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 12 | 3 |
| August | 2 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 25 (Medium) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 8 | 3 |
| September | 2 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 3 |
| October | 13 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |
| November | 11 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 | 3 |
| December | 81 (Medium) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |