| 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 | 147 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| February | 621 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 46 (Medium) | 0 (Low) | 196 (Very high) | 2 (Low) | 7 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 1 | 2 |
| March | 366 (Very high) | 996 (Very high) | 13 (Low) | 5 (Low) | 9 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 31 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 225 (Very high) | 25 (Medium) | 18 (Medium) | 158 (Very high) | 1 (Low) | 104 (Very high) | 8 (Low) | 18 (Medium) | 34 (Medium) | 6 | 5 |
| April | 41 (Medium) | 629 (Very high) | 23 (Low) | 52 (High) | 77 (Medium) | 5 (Low) | 0 (Low) | 2 (Low) | 132 (Very high) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 97 (High) | 5 (Low) | 45 (Medium) | 20 (Medium) | 2 (Low) | 847 (Very high) | 10 (Low) | 19 (Medium) | 20 (Medium) | 12 | 10 |
| May | 19 (Low) | 10 (Low) | 127 (High) | 40 (Medium) | 488 (Very high) | 1 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 48 (Medium) | 0 (Low) | 9 (Low) | 161 (Very high) | 7 (Low) | 2 (Low) | 12 (Low) | 19 | 7 |
| June | 7 (Low) | 2 (Low) | 44 (Medium) | 17 (Low) | 58 (Medium) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 28 (Medium) | 0 (Low) | 8 (Low) | 48 (Medium) | 3 (Low) | 0 (Low) | 10 (Low) | 11 | 4 |
| July | 3 (Low) | 1 (Low) | 7 (Low) | 13 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 9 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 11 (Low) | 64 | 2 |
| August | 2 (Low) | 3 (Low) | 6 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 27 (Medium) | 17 (Medium) | 2 (Low) | 1 (Low) | 4 (Low) | 12 | 2 |
| September | 4 (Low) | 6 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 14 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 | 2 |
| October | 14 (Low) | 2 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| November | 4 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| December | 45 (Medium) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (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) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |