| 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 | 886 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 81 (High) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 5 |
| February | 2,061 (Very high) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 77 (High) | 0 (Low) | 282 (Very high) | 1 (Low) | 64 (High) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 12 (Low) | 2 | 18 |
| March | 720 (Very high) | 840 (Very high) | 16 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 70 (High) | 1 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 5 (Low) | 1 (Low) | 26 (Medium) | 347 (Very high) | 74 (High) | 366 (Very high) | 238 (Very high) | 2 (Low) | 9 (Low) | 6 (Low) | 10 (Low) | 27 (Medium) | 38 | 39 |
| April | 54 (Medium) | 392 (Very high) | 9 (Low) | 9 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 339 (Very high) | 4 (Low) | 97 (High) | 26 (Medium) | 4 (Low) | 504 (Very high) | 7 (Low) | 14 (Low) | 9 (Low) | 7 | 34 |
| May | 79 (Medium) | 7 (Low) | 223 (Very high) | 73 (High) | 165 (Medium) | 3 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 27 (Medium) | 2 (Low) | 154 (Very high) | 1 (Low) | 5 (Low) | 1,286 (Very high) | 36 (Medium) | 8 (Low) | 9 (Low) | 17 | 35 |
| June | 102 (High) | 22 (Low) | 120 (High) | 19 (Low) | 169 (Medium) | 1 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 5 (Low) | 4 (Low) | 13 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 385 (Very high) | 0 (Low) | 10 (Low) | 383 (Very high) | 9 (Low) | 1 (Low) | 5 (Low) | 9 | 23 |
| July | 5 (Low) | 0 (Low) | 15 (Low) | 4 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 17 (Medium) | 4 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 16 (Medium) | 28 (Medium) | 1 (Low) | 0 (Low) | 5 (Low) | 89 | 23 |
| August | 2 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 15 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 72 | 21 |
| September | 4 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 15 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 11 | 15 |
| October | 36 (Medium) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 64 (High) | 0 (Low) | 5 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 6 | 7 |
| November | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (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) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 2 | 8 |
| December | 47 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 41 (Medium) | 1 | 5 |