| 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 | 239 (Very high) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 64 (High) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| February | 345 (Very high) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 69 (High) | 0 (Low) | 215 (Very high) | 3 (Low) | 21 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 | 2 |
| March | 656 (Very high) | 2,536 (Very high) | 14 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 9 (Low) | 148 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 20 (Medium) | 13 (Low) | 152 (Very high) | 51 (High) | 198 (Very high) | 0 (Low) | 2 (Low) | 1 (Low) | 9 (Low) | 5 (Low) | 7 | 12 |
| April | 24 (Low) | 2,619 (Very high) | 16 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 18 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 73 (High) | 2 (Low) | 50 (High) | 51 (High) | 0 (Low) | 150 (Very high) | 6 (Low) | 9 (Low) | 9 (Low) | 11 | 9 |
| May | 29 (Low) | 14 (Low) | 165 (Very high) | 82 (High) | 159 (Medium) | 9 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 41 (Medium) | 0 (Low) | 240 (Very high) | 2 (Low) | 11 (Low) | 1,771 (Very high) | 56 (High) | 8 (Low) | 23 (Medium) | 21 | 16 |
| June | 14 (Low) | 1 (Low) | 79 (Medium) | 44 (Medium) | 164 (Medium) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 302 (Very high) | 0 (Low) | 7 (Low) | 321 (Very high) | 23 (Medium) | 3 (Low) | 18 (Medium) | 9 | 12 |
| July | 8 (Low) | 0 (Low) | 21 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 22 (Medium) | 4 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 17 (Medium) | 1 (Low) | 9 (Low) | 33 (Medium) | 5 (Low) | 0 (Low) | 5 (Low) | 7 | 6 |
| August | 3 (Low) | 1 (Low) | 4 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 6 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 2 |
| September | 5 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 21 (Medium) | 8 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 | 4 |
| October | 5 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| November | 16 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| December | 111 (High) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 | 3 |