| 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 | 177 (High) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 163 (Very high) | 0 (Low) | 60 (High) | 3 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 11 (Low) | 0 | 5 |
| February | 644 (Very high) | 0 (Low) | 18 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 158 (Very high) | 0 (Low) | 109 (Very high) | 4 (Low) | 62 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 23 (Medium) | 3 | 10 |
| March | 60 (Medium) | 132 (High) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 11 (Low) | 6 (Low) | 4 (Low) | 135 (Very high) | 0 (Low) | 17 (Medium) | 1 (Low) | 8 (Low) | 27 (Medium) | 5 | 18 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | 45 (Medium) | 7 (Low) | 229 (Very high) | 219 (Very high) | 836 (Very high) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 16 (Medium) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 855 (Very high) | 0 (Low) | 12 (Low) | 756 (Very high) | 55 (High) | 0 (Low) | 21 (Medium) | 35 | 64 |
| June | 8 (Low) | 3 (Low) | 135 (High) | 33 (Medium) | 79 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 20 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 48 (Medium) | 0 (Low) | 5 (Low) | 21 (Medium) | 16 (Medium) | 0 (Low) | 9 (Low) | 19 | 23 |
| July | 8 (Low) | 2 (Low) | 64 (Medium) | 14 (Low) | 7 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 12 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 12 | 21 |
| August | 2 (Low) | 0 (Low) | 8 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 11 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 | 11 |
| September | 21 (Low) | 0 (Low) | 8 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 26 (Medium) | 7 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 4 | 8 |
| October | 11 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 5 | 10 |
| November | 47 (Medium) | 0 (Low) | 2 (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) | 1 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 | 4 |
| December | 720 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 4 |