| 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 | 1,491 (Very high) | 2 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 243 (Very high) | 0 (Low) | 4 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 | 9 |
| February | 4,365 (Very high) | 1 (Low) | 22 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 30 (Medium) | 1 (Low) | 0 (Low) | 291 (Very high) | 0 (Low) | 207 (Very high) | 2 (Low) | 68 (High) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 20 (Medium) | 3 | 4 |
| March | 921 (Very high) | 1,014 (Very high) | 17 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 56 (High) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 68 (High) | 59 (High) | 30 (Medium) | 22 (Medium) | 180 (Very high) | 1 (Low) | 14 (Low) | 3 (Low) | 9 (Low) | 16 (Medium) | 14 | 11 |
| April | 83 (Medium) | 652 (Very high) | 15 (Low) | 23 (Medium) | 9 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 39 (Medium) | 1 (Low) | 61 (High) | 17 (Medium) | 7 (Low) | 1,043 (Very high) | 14 (Low) | 13 (Low) | 21 (Medium) | 36 | 14 |
| May | 130 (High) | 31 (Medium) | 281 (Very high) | 92 (High) | 121 (Medium) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 22 (Medium) | 1 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 318 (Very high) | 1 (Low) | 4 (Low) | 2,331 (Very high) | 110 (Very high) | 4 (Low) | 12 (Low) | 42 | 17 |
| June | 67 (Medium) | 3 (Low) | 110 (High) | 19 (Low) | 129 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 17 (Medium) | 16 (Medium) | 1 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 276 (Very high) | 0 (Low) | 9 (Low) | 727 (Very high) | 40 (Medium) | 1 (Low) | 13 (Low) | 41 | 21 |
| July | 3 (Low) | 2 (Low) | 14 (Low) | 3 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 9 (Low) | 52 (High) | 5 (Low) | 0 (Low) | 7 (Low) | 7 | 15 |
| August | 2 (Low) | 1 (Low) | 7 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 11 (Low) | 24 (Medium) | 3 (Low) | 0 (Low) | 3 (Low) | 5 | 14 |
| September | 3 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 7 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 | 8 |
| October | 13 (Low) | 1 (Low) | 3 (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) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 | 5 |
| November | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 7 |
| December | 210 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 1 | 3 |