| 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 | 207 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 59 (High) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 193 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 161 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 | 2 |
| March | 424 (Very high) | 604 (Very high) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 208 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 22 (Medium) | 65 (High) | 254 (Very high) | 72 (High) | 254 (Very high) | 1 (Low) | 7 (Low) | 2 (Low) | 3 (Low) | 15 (Medium) | 4 | 4 |
| April | 14 (Low) | 466 (Very high) | 35 (Medium) | 93 (High) | 1 (Low) | 13 (Low) | 3 (Low) | 1 (Low) | 48 (Medium) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 402 (Very high) | 9 (Low) | 788 (Very high) | 64 (High) | 1 (Low) | 576 (Very high) | 14 (Low) | 9 (Low) | 6 (Low) | 8 | 5 |
| May | 7 (Low) | 6 (Low) | 186 (Very high) | 80 (High) | 308 (High) | 1 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 5 (Low) | 8 (Low) | 0 (Low) | 16 (Medium) | 6 (Low) | 14 (Low) | 32 (Medium) | 5 (Low) | 167 (Very high) | 0 (Low) | 8 (Low) | 530 (Very high) | 15 (Medium) | 3 (Low) | 6 (Low) | 38 | 50 |
| June | 4 (Low) | 0 (Low) | 36 (Medium) | 9 (Low) | 184 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 90 (High) | 0 (Low) | 6 (Low) | 85 (High) | 2 (Low) | 2 (Low) | 7 (Low) | 7 | 27 |
| July | 7 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 6 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 8 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 7 | 26 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 15 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 | 13 |
| September | 7 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 8 |
| October | 41 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 6 |
| November | 162 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (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) | 5 (Low) | 0 | 5 |
| December | 150 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 6 |