| 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 | 1,442 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 48 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| February | 1,492 (Very high) | 0 (Low) | 18 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 104 (Very high) | 0 (Low) | 107 (Very high) | 1 (Low) | 428 (Very high) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 11 (Low) | 1 | 1 |
| March | 1,026 (Very high) | 842 (Very high) | 13 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 28 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 11 (Low) | 5 (Low) | 780 (Very high) | 1 (Low) | 30 (Medium) | 1 (Low) | 6 (Low) | 26 (Medium) | 6 | 3 |
| April | 21 (Low) | 4,035 (Very high) | 13 (Low) | 26 (Medium) | 5 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 219 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 126 (Very high) | 3 (Low) | 127 (Very high) | 46 (Medium) | 4 (Low) | 831 (Very high) | 7 (Low) | 16 (Medium) | 21 (Medium) | 12 | 4 |
| May | 21 (Low) | 9 (Low) | 226 (Very high) | 44 (Medium) | 356 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 256 (Very high) | 47 (Medium) | 7 (Low) | 1,025 (Very high) | 61 (High) | 7 (Low) | 19 (Medium) | 10 | 5 |
| June | 3 (Low) | 6 (Low) | 103 (High) | 25 (Medium) | 13 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 12 (Low) | 8 (Low) | 0 (Low) | 14 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 5 (Low) | 23 (Medium) | 14 (Low) | 1 (Low) | 11 (Low) | 15 | 3 |
| July | 14 (Low) | 12 (Low) | 38 (Medium) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 10 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 5 (Low) | 22 (Medium) | 2 (Low) | 0 (Low) | 10 (Low) | 8 | 3 |
| August | 1 (Low) | 5 (Low) | 8 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 7 | 2 |
| September | 2 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| October | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| November | 2 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |
| December | 3 (Low) | 2 (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) | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |