| 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 | 19 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| February | 512 (Very high) | 1 (Low) | 16 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 (Low) | 1,058 (Very high) | 1 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 0 | 1 |
| March | 602 (Very high) | 3,511 (Very high) | 9 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 21 (Medium) | 37 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 23 (Medium) | 67 (High) | 819 (Very high) | 99 (High) | 294 (Very high) | 1 (Low) | 3 (Low) | 2 (Low) | 5 (Low) | 19 (Medium) | 2 | 3 |
| April | 22 (Low) | 1,726 (Very high) | 6 (Low) | 13 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 315 (Very high) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 6 (Low) | 78 (High) | 8 (Low) | 36 (Medium) | 28 (Medium) | 1 (Low) | 34 (Medium) | 3 (Low) | 4 (Low) | 19 (Medium) | 6 | 3 |
| May | 13 (Low) | 23 (Low) | 162 (Very high) | 39 (Medium) | 112 (Medium) | 3 (Low) | 123 (Very high) | 0 (Low) | 238 (Very high) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 18 (Medium) | 2 (Low) | 164 (Very high) | 1 (Low) | 6 (Low) | 901 (Very high) | 36 (Medium) | 2 (Low) | 62 (High) | 110 | 9 |
| June | 6 (Low) | 9 (Low) | 65 (Medium) | 9 (Low) | 42 (Low) | 1 (Low) | 24 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 16 (Medium) | 6 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 104 (Very high) | 1 (Low) | 5 (Low) | 193 (Very high) | 13 (Low) | 1 (Low) | 12 (Low) | 15 | 3 |
| July | 2 (Low) | 3 (Low) | 11 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 5 (Low) | 21 (Medium) | 4 (Low) | 1 (Low) | 5 (Low) | 15 | 3 |
| August | 1 (Low) | 4 (Low) | 6 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 16 (Medium) | 12 (Low) | 18 (Medium) | 6 (Low) | 0 (Low) | 11 (Low) | 29 | 2 |
| September | 3 (Low) | 4 (Low) | 8 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 21 (Medium) | 13 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 17 | 2 |
| October | 4 (Low) | 10 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 2 | 2 |
| November | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| December | 125 (High) | 1 (Low) | 10 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 1 |