| 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 | 475 (Very high) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 16 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 74 (High) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 2 |
| February | 120 (High) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 81 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 2 | 1 |
| March | 488 (Very high) | 1,922 (Very high) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 37 (Medium) | 60 (High) | 65 (High) | 5 (Low) | 342 (Very high) | 1 (Low) | 15 (Medium) | 2 (Low) | 17 (Medium) | 20 (Medium) | 6 | 3 |
| April | 31 (Medium) | 2,853 (Very high) | 24 (Low) | 128 (Very high) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 5 (Low) | 1 (Low) | 29 (Medium) | 111 (Very high) | 2 (Low) | 95 (High) | 87 (High) | 2 (Low) | 823 (Very high) | 27 (Medium) | 6 (Low) | 12 (Low) | 18 | 3 |
| May | 15 (Low) | 12 (Low) | 145 (High) | 154 (Very high) | 396 (High) | 2 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 182 (Very high) | 0 (Low) | 11 (Low) | 720 (Very high) | 24 (Medium) | 2 (Low) | 5 (Low) | 34 | 5 |
| June | 7 (Low) | 2 (Low) | 44 (Medium) | 26 (Medium) | 130 (Medium) | 2 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 25 (Medium) | 7 (Low) | 0 (Low) | 2 (Low) | 36 (Medium) | 0 (Low) | 3 (Low) | 0 (Low) | 213 (Very high) | 0 (Low) | 7 (Low) | 105 (Very high) | 6 (Low) | 0 (Low) | 14 (Low) | 19 | 4 |
| July | 3 (Low) | 2 (Low) | 23 (Low) | 10 (Low) | 12 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 30 (Medium) | 5 (Low) | 0 (Low) | 1 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 14 (Low) | 22 (Medium) | 1 (Low) | 0 (Low) | 10 (Low) | 38 | 3 |
| August | 1 (Low) | 1 (Low) | 7 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 10 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 11 | 2 |
| September | 3 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 13 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 9 | 2 |
| October | 22 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 4 | 1 |
| November | 197 (High) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 18 (Medium) | 2 | 1 |
| December | 19 (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) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |