| 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 | 173 (High) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 35 (Medium) | 25 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 22 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 | 5 |
| February | 303 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 46 (Medium) | 2 (Low) | 74 (High) | 1 (Low) | 30 (Medium) | 0 (Low) | 6 (Low) | 10 (Low) | 0 (Low) | 23 (Medium) | 2 | 6 |
| March | 374 (Very high) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 14 (Low) | 9 (Low) | 4 (Low) | 25 (Medium) | 1 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 11 (Low) | 1 | 5 |
| April | 12 (Low) | 2,162 (Very high) | 39 (Medium) | 21 (Medium) | 14 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 367 (Very high) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 7 (Low) | 291 (Very high) | 2 (Low) | 82 (High) | 12 (Low) | 2 (Low) | 121 (Very high) | 33 (Medium) | 0 (Low) | 25 (Medium) | 13 | 21 |
| May | 9 (Low) | 37 (Medium) | 436 (Very high) | 34 (Medium) | 218 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 248 (Very high) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 14 (Low) | 6 (Low) | 0 (Low) | 129 (Very high) | 0 (Low) | 38 (Medium) | 0 (Low) | 6 (Low) | 97 (High) | 27 (Medium) | 24 (Medium) | 8 (Low) | 55 | 27 |
| June | 24 (Low) | 2 (Low) | 97 (High) | 23 (Medium) | 1,519 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 25 (Medium) | 0 (Low) | 2 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 68 (High) | 0 (Low) | 8 (Low) | 40 (Medium) | 8 (Low) | 7 (Low) | 8 (Low) | 35 | 20 |
| July | 6 (Low) | 6 (Low) | 124 (High) | 4 (Low) | 66 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 0 (Low) | 6 (Low) | 29 (Medium) | 4 (Low) | 0 (Low) | 10 (Low) | 10 | 17 |
| August | 1 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 48 (Medium) | 26 (Medium) | 1 (Low) | 0 (Low) | 4 (Low) | 2 | 5 |
| September | 6 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 32 (Medium) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 | 8 |
| October | 43 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 17 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 3 |
| November | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 5 |
| December | 16 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 7 |