| 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 | 675 (Very high) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 30 (Medium) | 10 (Low) | 1 (Low) | 1 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 5 (Low) | 3 | 8 |
| February | 820 (Very high) | 0 (Low) | 17 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 729 (Very high) | 3 (Low) | 33 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 2 | 4 |
| March | 1,422 (Very high) | 2,441 (Very high) | 16 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 311 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 31 (Medium) | 104 (Very high) | 65 (High) | 57 (High) | 221 (Very high) | 1 (Low) | 17 (Medium) | 20 (Medium) | 14 (Low) | 11 (Low) | 5 | 12 |
| April | 20 (Low) | 363 (Very high) | 6 (Low) | 6 (Low) | 1 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 274 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 121 (Very high) | 3 (Low) | 23 (Medium) | 4 (Low) | 2 (Low) | 154 (Very high) | 6 (Low) | 1 (Low) | 3 (Low) | 11 | 12 |
| May | 59 (Medium) | 21 (Low) | 119 (High) | 24 (Medium) | 195 (Medium) | 1 (Low) | 36 (Medium) | 1 (Low) | 237 (Very high) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 151 (Very high) | 0 (Low) | 9 (Low) | 251 (Very high) | 19 (Medium) | 2 (Low) | 17 (Medium) | 18 | 17 |
| June | 22 (Low) | 0 (Low) | 40 (Medium) | 5 (Low) | 211 (High) | 5 (Low) | 1 (Low) | 0 (Low) | 106 (Very high) | 0 (Low) | 3 (Low) | 13 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 61 (High) | 3 (Low) | 24 (Medium) | 162 (Very high) | 10 (Low) | 0 (Low) | 7 (Low) | 16 | 15 |
| July | 2 (Low) | 0 (Low) | 10 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 10 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 13 (Low) | 27 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 5 | 7 |
| August | 2 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 | 7 |
| September | 1 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 17 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 | 5 |
| October | 20 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 4 |
| November | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 4 |
| December | 25 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 3 | 2 |