| 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 | 165 (High) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 68 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | — | 1 |
| February | 497 (Very high) | 0 (Low) | 18 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 (Low) | 129 (Very high) | 1 (Low) | 194 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 11 (Low) | — | 0 |
| March | 392 (Very high) | 3,502 (Very high) | 31 (Medium) | 9 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 2 (Low) | 108 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 23 (Medium) | 110 (Very high) | 6 (Low) | 49 (Medium) | 117 (Very high) | 1 (Low) | 177 (Very high) | 1 (Low) | 17 (Medium) | 40 (Medium) | 5 | 6 |
| April | 15 (Low) | 195 (High) | 15 (Low) | 97 (High) | 16 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 2 (Low) | 68 (High) | 1 (Low) | 27 (Medium) | 329 (Very high) | 1 (Low) | 1,143 (Very high) | 18 (Medium) | 12 (Low) | 66 (High) | 21 | 12 |
| May | 34 (Medium) | 13 (Low) | 226 (Very high) | 52 (High) | 756 (Very high) | 8 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 9 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 224 (Very high) | 0 (Low) | 12 (Low) | 316 (Very high) | 39 (Medium) | 4 (Low) | 35 (Medium) | 20 | 20 |
| June | 30 (Medium) | 2 (Low) | 54 (Medium) | 23 (Medium) | 69 (Medium) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 5 (Low) | 0 (Low) | 8 (Low) | 59 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 203 (Very high) | 0 (Low) | 6 (Low) | 153 (Very high) | 15 (Medium) | 1 (Low) | 10 (Low) | 21 | 9 |
| July | 1 (Low) | 3 (Low) | 25 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 13 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 186 | 4 |
| August | 1 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 16 (Medium) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 10 | 1 |
| September | 1 (Low) | 1 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 28 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 | 4 |
| October | 25 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 12 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 1 |
| December | 14 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |