| 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 | 383 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 2 |
| February | 176 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 56 (High) | 0 (Low) | 37 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 | 2 |
| March | 62 (Medium) | 2 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 11 (Low) | 48 (Medium) | 0 (Low) | 4 (Low) | 3 (Low) | 3 (Low) | 18 (Medium) | 9 | 2 |
| April | 9 (Low) | 945 (Very high) | 31 (Medium) | 19 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 20 (Medium) | 0 (Low) | 9 (Low) | 13 (Low) | 2 (Low) | 83 (High) | 14 (Low) | 14 (Low) | 20 (Medium) | 20 | 13 |
| May | 29 (Low) | 31 (Medium) | 111 (High) | 78 (High) | 89 (Medium) | 5 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 0 (Low) | 1 (Low) | 27 (Medium) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 3 (Low) | 109 (Very high) | 27 (Medium) | 4 (Low) | 11 (Low) | 53 | 9 |
| June | 17 (Low) | 12 (Low) | 135 (High) | 32 (Medium) | 407 (Very high) | 2 (Low) | 22 (Medium) | 0 (Low) | 16 (Medium) | 0 (Low) | 2 (Low) | 18 (Medium) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 106 (Very high) | 0 (Low) | 6 (Low) | 32 (Medium) | 11 (Low) | 1 (Low) | 10 (Low) | 50 | 10 |
| July | 18 (Low) | 6 (Low) | 103 (High) | 8 (Low) | 78 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 12 (Low) | 0 (Low) | 2 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 5 (Low) | 16 (Medium) | 3 (Low) | 0 (Low) | 11 (Low) | 17 | 6 |
| August | 3 (Low) | 12 (Low) | 13 (Low) | 4 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 11 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 29 | 3 |
| September | 5 (Low) | 8 (Low) | 10 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 7 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 5 | 2 |
| October | 13 (Low) | 3 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 | 2 |
| November | 3 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 | 2 |
| December | 38 (Medium) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |