| 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 | 1,126 (Very high) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 1 | 6 |
| February | 760 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 268 (Very high) | 1 (Low) | 81 (High) | 0 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 36 (Medium) | 10 | 16 |
| March | 1,342 (Very high) | 532 (Very high) | 11 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 46 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 74 (High) | 6 (Low) | 4 (Low) | 258 (Very high) | 0 (Low) | 13 (Low) | 1 (Low) | 5 (Low) | 34 (Medium) | 10 | 26 |
| April | 58 (Medium) | 3,576 (Very high) | 23 (Low) | 53 (High) | 17 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 128 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 283 (Very high) | 2 (Low) | 62 (High) | 145 (Very high) | 4 (Low) | 697 (Very high) | 16 (Medium) | 7 (Low) | 50 (High) | 34 | 82 |
| May | 172 (High) | 27 (Low) | 524 (Very high) | 142 (Very high) | 388 (High) | 4 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 2 (Low) | 16 (Medium) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 348 (Very high) | 1 (Low) | 11 (Low) | 1,034 (Very high) | 79 (High) | 22 (Medium) | 23 (Medium) | 26 | 65 |
| June | 44 (Medium) | 8 (Low) | 377 (Very high) | 69 (High) | 738 (Very high) | 2 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 24 (Medium) | 0 (Low) | 5 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 505 (Very high) | 0 (Low) | 5 (Low) | 230 (Very high) | 32 (Medium) | 9 (Low) | 15 (Medium) | 26 | 54 |
| July | 7 (Low) | 4 (Low) | 9 (Low) | 12 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 6 (Low) | 37 (Medium) | 3 (Low) | 0 (Low) | 4 (Low) | 8 | 15 |
| August | 4 (Low) | 3 (Low) | 7 (Low) | 9 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 20 (Medium) | 14 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 8 | 7 |
| September | 3 (Low) | 2 (Low) | 5 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 6 |
| October | 5 (Low) | 3 (Low) | 4 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 3 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 4 |
| November | 14 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| December | 11 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |