| 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 | 110 (High) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| February | 97 (High) | 2 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 66 (High) | 0 (Low) | 8 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 | 1 |
| March | 299 (Very high) | 38 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 26 (Medium) | 2 (Low) | 142 (Very high) | 1 (Low) | 12 (Low) | 2 (Low) | 5 (Low) | 15 (Medium) | 5 | 3 |
| April | 8 (Low) | 815 (Very high) | 21 (Low) | 57 (High) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 157 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 705 (Very high) | 0 (Low) | 32 (Medium) | 12 (Low) | 9 (Low) | 871 (Very high) | 36 (Medium) | 8 (Low) | 12 (Low) | 162 | 8 |
| May | 48 (Medium) | 84 (Medium) | 421 (Very high) | 47 (Medium) | 441 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 75 (High) | 3 (Low) | 5 (Low) | 16 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 63 (High) | 0 (Low) | 34 (Medium) | 0 (Low) | 31 (Medium) | 304 (Very high) | 29 (Medium) | 9 (Low) | 47 (Medium) | 47 | 15 |
| June | 22 (Low) | 4 (Low) | 200 (Very high) | 14 (Low) | 706 (Very high) | 1 (Low) | 14 (Low) | 1 (Low) | 17 (Medium) | 1 (Low) | 3 (Low) | 25 (Medium) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 114 (Very high) | 0 (Low) | 14 (Low) | 105 (Very high) | 26 (Medium) | 0 (Low) | 11 (Low) | 47 | 21 |
| July | 2 (Low) | 4 (Low) | 20 (Low) | 10 (Low) | 19 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 3 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 46 (Medium) | 8 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 7 | 4 |
| August | 2 (Low) | 4 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 61 (High) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 | 3 |
| September | 2 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 32 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 | 2 |
| October | 25 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 | 1 |
| November | 99 (High) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 52 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 | 1 |
| December | 36 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |