| 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 | 135 (High) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 72 (High) | 0 (Low) | 36 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 1 | 8 |
| February | 759 (Very high) | 0 (Low) | 20 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 66 (High) | 0 (Low) | 137 (Very high) | 1 (Low) | 79 (High) | 1 (Low) | 4 (Low) | 1 (Low) | 6 (Low) | 42 (Medium) | 4 | 14 |
| March | 79 (Medium) | 628 (Very high) | 10 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 117 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 184 (Very high) | 13 (Low) | 269 (Very high) | 194 (Very high) | 1 (Low) | 45 (Medium) | 0 (Low) | 23 (Medium) | 37 (Medium) | 5 | 27 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | 11 (Low) | 1 (Low) | 188 (Very high) | 36 (Medium) | 835 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 103 (Very high) | 0 (Low) | 6 (Low) | 156 (Very high) | 9 (Low) | 1 (Low) | 11 (Low) | 30 | 27 |
| June | 5 (Low) | 0 (Low) | 139 (High) | 12 (Low) | 51 (Medium) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 14 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 74 (High) | 0 (Low) | 7 (Low) | 14 (Low) | 11 (Low) | 1 (Low) | 10 (Low) | 19 | 42 |
| July | 2 (Low) | 1 (Low) | 42 (Medium) | 3 (Low) | 10 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 19 | 42 |
| August | 1 (Low) | 1 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 14 | 11 |
| September | 14 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 23 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 9 |
| October | 17 (Low) | 9 (Low) | 5 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 35 (Medium) | 1 (Low) | 3 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 2 | 7 |
| November | 43 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 2 | 16 |
| December | 385 (Very high) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 1 | 8 |