| 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 | 378 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 51 (High) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 | 5 |
| February | 188 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 38 (Medium) | 0 (Low) | 102 (Very high) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 22 (Medium) | 8 | 5 |
| March | 199 (High) | 1,524 (Very high) | 9 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 29 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 9 (Low) | 787 (Very high) | 61 (High) | 50 (High) | 401 (Very high) | 1 (Low) | 42 (Medium) | 2 (Low) | 5 (Low) | 52 (High) | 16 | 24 |
| April | 57 (Medium) | 398 (Very high) | 45 (Medium) | 57 (High) | 382 (High) | 18 (Medium) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 2 (Low) | 402 (Very high) | 7 (Low) | 117 (Very high) | 37 (Medium) | 5 (Low) | 767 (Very high) | 5 (Low) | 11 (Low) | 11 (Low) | 26 | 37 |
| May | 29 (Low) | 5 (Low) | 38 (Medium) | 47 (Medium) | 631 (Very high) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 67 (High) | 1 (Low) | 4 (Low) | 300 (Very high) | 3 (Low) | 2 (Low) | 5 (Low) | 28 | 38 |
| June | 12 (Low) | 1 (Low) | 44 (Medium) | 149 (Very high) | 5 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 12 (Low) | 0 (Low) | 13 (Low) | 60 (High) | 9 (Low) | 0 (Low) | 18 (Medium) | 12 | 25 |
| July | 1 (Low) | 0 (Low) | 33 (Medium) | 41 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 36 (Medium) | 11 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 155 | 22 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 21 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 62 | 15 |
| September | 4 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 16 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 9 | 10 |
| October | 13 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (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) | 9 (Low) | 1 (Low) | 19 (Medium) | 30 (Medium) | 4 (Low) | 0 (Low) | 12 (Low) | 2 | 9 |
| November | 201 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 17 (Medium) | 1 | 5 |
| December | 163 (High) | 0 (Low) | 1 (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) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 2 | 3 |