| 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 | 545 (Very high) | 0 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 60 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 100 (Very high) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 | 2 |
| February | 326 (Very high) | 1 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 71 (High) | 0 (Low) | 561 (Very high) | 2 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 4 (Low) | 2 | 2 |
| March | 543 (Very high) | 4,993 (Very high) | 12 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 34 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 82 (High) | 75 (High) | 719 (Very high) | 36 (Medium) | 298 (Very high) | 0 (Low) | 3 (Low) | 3 (Low) | 12 (Low) | 30 (Medium) | 8 | 13 |
| April | 23 (Low) | 1,430 (Very high) | 43 (Medium) | 157 (Very high) | 6 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 6 (Low) | 78 (High) | 6 (Low) | 135 (Very high) | 33 (Medium) | 3 (Low) | 1,344 (Very high) | 20 (Medium) | 6 (Low) | 20 (Medium) | 21 | 8 |
| May | 27 (Low) | 14 (Low) | 248 (Very high) | 179 (Very high) | 585 (Very high) | 1 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 25 (Medium) | 1 (Low) | 0 (Low) | 10 (Low) | 3 (Low) | 494 (Very high) | 1 (Low) | 7 (Low) | 1,350 (Very high) | 55 (High) | 1 (Low) | 14 (Low) | 42 | 30 |
| June | 12 (Low) | 4 (Low) | 58 (Medium) | 17 (Low) | 144 (Medium) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 10 (Low) | 0 (Low) | 4 (Low) | 34 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 433 (Very high) | 0 (Low) | 9 (Low) | 153 (Very high) | 4 (Low) | 0 (Low) | 19 (Medium) | 15 | 11 |
| July | 4 (Low) | 2 (Low) | 35 (Medium) | 17 (Low) | 9 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 20 (Medium) | 7 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 14 (Low) | 32 (Medium) | 1 (Low) | 0 (Low) | 7 (Low) | 132 | 25 |
| August | 1 (Low) | 6 (Low) | 10 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 27 (Medium) | 19 (Medium) | 2 (Low) | 0 (Low) | 5 (Low) | 326 | 4 |
| September | 8 (Low) | 2 (Low) | 10 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 15 (Medium) | 16 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 20 | 4 |
| October | 57 (Medium) | 4 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 8 | 5 |
| November | 305 (Very high) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 26 (Medium) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 6 | 6 |
| December | 426 (Very high) | 1 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 3 | 4 |