| 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 | 65 (Medium) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 28 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| February | 325 (Very high) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 80 (High) | 2 (Low) | 138 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 | 1 |
| March | 206 (Very high) | 2,049 (Very high) | 19 (Low) | 4 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 29 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 14 (Low) | 80 (High) | 8 (Low) | 25 (Medium) | 116 (Very high) | 1 (Low) | 39 (Medium) | 1 (Low) | 3 (Low) | 19 (Medium) | 4 | 2 |
| April | 8 (Low) | 97 (Medium) | 10 (Low) | 19 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 52 (High) | 5 (Low) | 18 (Medium) | 5 (Low) | 1 (Low) | 641 (Very high) | 10 (Low) | 5 (Low) | 33 (Medium) | 9 | 3 |
| May | 21 (Low) | 7 (Low) | 228 (Very high) | 38 (Medium) | 629 (Very high) | 4 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 9 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 149 (Very high) | 0 (Low) | 13 (Low) | 237 (Very high) | 37 (Medium) | 1 (Low) | 15 (Medium) | 21 | 5 |
| June | 19 (Low) | 0 (Low) | 70 (Medium) | 23 (Medium) | 64 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 126 (Very high) | 0 (Low) | 6 (Low) | 122 (Very high) | 12 (Low) | 1 (Low) | 7 (Low) | 11 | 3 |
| July | 1 (Low) | 0 (Low) | 26 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 88 | 2 |
| August | 0 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 6 | 1 |
| September | 0 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 21 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 0 |
| October | 12 (Low) | 0 (Low) | 2 (Low) | 0 (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) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| November | 12 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (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) | 2 (Low) | 1 | 0 |
| December | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (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) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |