| 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 | 183 (High) | 6 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |
| February | 97 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 | 1 |
| March | 432 (Very high) | 2 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 18 (Medium) | 9 (Low) | 50 (High) | 1 (Low) | 3 (Low) | 4 (Low) | 4 (Low) | 28 (Medium) | 13 | 8 |
| April | 13 (Low) | 2,479 (Very high) | 21 (Low) | 31 (Medium) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 99 (High) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 60 (High) | 20 (Medium) | 43 (Medium) | 12 (Low) | 5 (Low) | 62 (High) | 13 (Low) | 18 (Medium) | 33 (Medium) | 19 | 12 |
| May | 22 (Low) | 59 (Medium) | 172 (Very high) | 106 (Very high) | 110 (Medium) | 7 (Low) | 0 (Low) | 0 (Low) | 66 (High) | 0 (Low) | 1 (Low) | 15 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 45 (Medium) | 1 (Low) | 3 (Low) | 77 (High) | 36 (Medium) | 5 (Low) | 30 (Medium) | 51 | 8 |
| June | 18 (Low) | 23 (Low) | 168 (Very high) | 43 (Medium) | 519 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 5 (Low) | 22 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 124 (Very high) | 0 (Low) | 5 (Low) | 42 (Medium) | 20 (Medium) | 1 (Low) | 8 (Low) | 53 | 11 |
| July | 17 (Low) | 11 (Low) | 99 (High) | 10 (Low) | 105 (Medium) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 6 (Low) | 22 (Medium) | 5 (Low) | 0 (Low) | 12 (Low) | 17 | 8 |
| August | 1 (Low) | 5 (Low) | 7 (Low) | 6 (Low) | 11 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 19 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 16 | 5 |
| September | 5 (Low) | 2 (Low) | 8 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 25 (Medium) | 4 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 3 | 3 |
| October | 15 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 1 |
| December | 49 (Medium) | 3 (Low) | 3 (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) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |