| 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 | 830 (Very high) | 1 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 74 (High) | 0 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 | 3 |
| February | 1,656 (Very high) | 2 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 0 (Low) | 112 (Very high) | 0 (Low) | 255 (Very high) | 2 (Low) | 45 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 14 (Low) | 2 | 2 |
| March | 527 (Very high) | 5,494 (Very high) | 16 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 25 (Medium) | 51 (High) | 41 (Medium) | 81 (High) | 423 (Very high) | 1 (Low) | 9 (Low) | 3 (Low) | 24 (Medium) | 13 (Low) | 19 | 4 |
| April | 65 (Medium) | 3,086 (Very high) | 8 (Low) | 13 (Low) | 3 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 73 (High) | 5 (Low) | 114 (Very high) | 34 (Medium) | 3 (Low) | 274 (Very high) | 4 (Low) | 5 (Low) | 9 (Low) | 16 | 4 |
| May | 80 (Medium) | 97 (Medium) | 109 (High) | 62 (High) | 57 (Medium) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 19 (Medium) | 1 (Low) | 670 (Very high) | 4 (Low) | 4 (Low) | 1,566 (Very high) | 29 (Medium) | 1 (Low) | 10 (Low) | 28 | 6 |
| June | 58 (Medium) | 11 (Low) | 63 (Medium) | 13 (Low) | 122 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 17 (Medium) | 7 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 278 (Very high) | 1 (Low) | 11 (Low) | 468 (Very high) | 12 (Low) | 1 (Low) | 13 (Low) | 17 | 6 |
| July | 5 (Low) | 4 (Low) | 10 (Low) | 4 (Low) | 8 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 6 (Low) | 78 (High) | 2 (Low) | 0 (Low) | 6 (Low) | 29 | 6 |
| August | 4 (Low) | 7 (Low) | 6 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 19 (Medium) | 2 (Low) | 0 (Low) | 5 (Low) | 10 | 4 |
| September | 5 (Low) | 3 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 5 | 2 |
| October | 18 (Low) | 4 (Low) | 2 (Low) | 3 (Low) | 0 (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) | 1 (Low) | 10 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 6 | 1 |
| November | 3 (Low) | 2 (Low) | 1 (Low) | 1 (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) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 | 3 |
| December | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |