| 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 | 95 (High) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 38 (Medium) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 1 |
| February | 308 (Very high) | 1 (Low) | 16 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 58 (High) | 0 (Low) | 189 (Very high) | 1 (Low) | 31 (Medium) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 3 (Low) | 4 | 1 |
| March | 367 (Very high) | 1,520 (Very high) | 14 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 13 (Low) | 62 (High) | 193 (Very high) | 35 (Medium) | 141 (Very high) | 1 (Low) | 32 (Medium) | 0 (Low) | 9 (Low) | 8 (Low) | 1 | 0 |
| April | 32 (Medium) | 936 (Very high) | 22 (Low) | 9 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 157 (Very high) | 2 (Low) | 36 (Medium) | 34 (Medium) | 0 (Low) | 169 (Very high) | 3 (Low) | 4 (Low) | 9 (Low) | 2 | 2 |
| May | 11 (Low) | 20 (Low) | 351 (Very high) | 52 (High) | 221 (High) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 10 (Low) | 0 (Low) | 27 (Medium) | 1 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 233 (Very high) | 51 (High) | 11 (Low) | 1,200 (Very high) | 51 (High) | 5 (Low) | 15 (Medium) | 2 | 2 |
| June | 6 (Low) | 2 (Low) | 106 (High) | 13 (Low) | 291 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 191 (Very high) | 0 (Low) | 9 (Low) | 549 (Very high) | 21 (Medium) | 13 (Low) | 15 (Medium) | 5 | 4 |
| July | 2 (Low) | 0 (Low) | 22 (Low) | 1 (Low) | 6 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 4 (Low) | 65 (High) | 1 (Low) | 0 (Low) | 4 (Low) | 1 | 3 |
| August | 3 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 6 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| September | 1 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| October | 3 (Low) | 0 (Low) | 2 (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) | 1 (Low) | 1 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 1 |
| November | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| December | 162 (High) | 0 (Low) | 5 (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) | 1 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 0 |