| 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 | 529 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 73 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 414 (Very high) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | — | 3 |
| February | 525 (Very high) | 0 (Low) | 24 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 (Low) | 128 (Very high) | 4 (Low) | 267 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 | 2 |
| March | 1,064 (Very high) | 586 (Very high) | 16 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 198 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 20 (Medium) | 3,548 (Very high) | 103 (Very high) | 38 (Medium) | 470 (Very high) | 1 (Low) | 11 (Low) | 2 (Low) | 14 (Low) | 18 (Medium) | 12 | 11 |
| April | 14 (Low) | 42 (Medium) | 6 (Low) | 14 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 651 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 1,555 (Very high) | 1 (Low) | 48 (Medium) | 5 (Low) | 0 (Low) | 251 (Very high) | 4 (Low) | 9 (Low) | 0 (Low) | 5 | 9 |
| May | 27 (Low) | 6 (Low) | 183 (Very high) | 70 (High) | 569 (Very high) | 3 (Low) | 24 (Medium) | 0 (Low) | 196 (Very high) | 1 (Low) | 3 (Low) | 10 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 240 (Very high) | 1 (Low) | 13 (Low) | 423 (Very high) | 27 (Medium) | 4 (Low) | 14 (Low) | 113 | 14 |
| June | 19 (Low) | 2 (Low) | 58 (Medium) | 12 (Low) | 70 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 20 (Medium) | 4 (Low) | 1 (Low) | 12 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 238 (Very high) | 0 (Low) | 3 (Low) | 118 (Very high) | 17 (Medium) | 1 (Low) | 16 (Medium) | 66 | 11 |
| July | 1 (Low) | 0 (Low) | 19 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 21 (Medium) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 66 | 18 |
| August | 2 (Low) | 1 (Low) | 6 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 24 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 39 | 6 |
| September | 1 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 17 (Medium) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 | 4 |
| October | 20 (Low) | 0 (Low) | 1 (Low) | 1 (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) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |
| November | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 4 |
| December | 36 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (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) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 2 |