| 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 | 19 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 565 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 223 (Very high) | 1 (Low) | 16 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 | 4 |
| March | 151 (High) | 239 (High) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 55 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 132 (Very high) | 2 (Low) | 27 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 | 8 |
| April | 3 (Low) | 415 (Very high) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 32 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 52 (High) | 1 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 1 | 6 |
| May | 5 (Low) | 142 (High) | 172 (Very high) | 40 (Medium) | 214 (High) | 3 (Low) | 4 (Low) | 0 (Low) | 211 (Very high) | 0 (Low) | 19 (Medium) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 58 (High) | 0 (Low) | 100 (Very high) | 133 (Very high) | 4 (Low) | 251 (Very high) | 41 (Medium) | 0 (Low) | 3 (Low) | 105 | 25 |
| June | 7 (Low) | 3 (Low) | 108 (High) | 26 (Medium) | 171 (Medium) | 1 (Low) | 71 (High) | 0 (Low) | 102 (Very high) | 0 (Low) | 16 (Medium) | 7 (Low) | 7 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 15 (Medium) | 114 (Very high) | 78 (High) | 24 (Medium) | 129 (Very high) | 21 (Medium) | 0 (Low) | 7 (Low) | 268 | 29 |
| July | 4 (Low) | 0 (Low) | 40 (Medium) | 4 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 25 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 27 (Medium) | 5 (Low) | 0 (Low) | 5 (Low) | 7 | 13 |
| August | 3 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 35 (Medium) | 10 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 6 | 6 |
| September | 4 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 8 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 2 | 12 |
| October | 4 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 | 3 |
| November | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (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) | 3 (Low) | 0 | 2 |
| December | 37 (Medium) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 6 |