| 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 | 223 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 61 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 1 |
| February | 1,360 (Very high) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 14 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 77 (High) | 2 (Low) | 278 (Very high) | 3 (Low) | 51 (High) | 1 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 2 | 3 |
| March | 819 (Very high) | 3,161 (Very high) | 13 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 50 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 20 (Medium) | 167 (Very high) | 565 (Very high) | 485 (Very high) | 0 (Low) | 99 (High) | 6 (Low) | 4 (Low) | 49 (Medium) | 4 | 10 |
| April | 18 (Low) | 5,838 (Very high) | 25 (Low) | 41 (Medium) | 10 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 47 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 117 (Very high) | 0 (Low) | 437 (Very high) | 69 (High) | 2 (Low) | 231 (Very high) | 9 (Low) | 2 (Low) | 51 (High) | 9 | 9 |
| May | 18 (Low) | 66 (Medium) | 211 (Very high) | 49 (Medium) | 108 (Medium) | 9 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 577 (Very high) | 1 (Low) | 5 (Low) | 214 (Very high) | 22 (Medium) | 1 (Low) | 18 (Medium) | 25 | 6 |
| June | 15 (Low) | 3 (Low) | 272 (Very high) | 46 (Medium) | 312 (High) | 7 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 6 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 474 (Very high) | 0 (Low) | 8 (Low) | 352 (Very high) | 25 (Medium) | 0 (Low) | 15 (Medium) | 28 | 10 |
| July | 4 (Low) | 5 (Low) | 53 (Medium) | 13 (Low) | 16 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 5 (Low) | 35 (Medium) | 1 (Low) | 0 (Low) | 6 (Low) | 6 | 7 |
| August | 1 (Low) | 0 (Low) | 7 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 19 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 5 | 2 |
| September | 1 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 15 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 | 2 |
| October | 8 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 | 2 |
| November | 5 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 | 2 |
| December | 34 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 5 |