| 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 | 263 (Very high) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 11 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 1 |
| February | 793 (Very high) | 2 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 31 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 135 (Very high) | 0 (Low) | 432 (Very high) | 5 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 2 | 1 |
| March | 328 (Very high) | 9 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 63 (High) | 4 (Low) | 68 (High) | 0 (Low) | 1 (Low) | 2 (Low) | 4 (Low) | 21 (Medium) | 8 | 1 |
| April | 29 (Low) | 3,032 (Very high) | 9 (Low) | 13 (Low) | 2 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 172 (Very high) | 6 (Low) | 136 (Very high) | 52 (High) | 5 (Low) | 408 (Very high) | 6 (Low) | 5 (Low) | 74 (High) | 24 | 2 |
| May | 15 (Low) | 162 (High) | 76 (Medium) | 102 (Very high) | 129 (Medium) | 15 (Medium) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 175 (Very high) | 1 (Low) | 202 (Very high) | 1 (Low) | 5 (Low) | 2,381 (Very high) | 27 (Medium) | 2 (Low) | 21 (Medium) | 31 | 5 |
| June | 46 (Medium) | 8 (Low) | 141 (High) | 60 (High) | 520 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 9 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 419 (Very high) | 0 (Low) | 10 (Low) | 161 (Very high) | 17 (Medium) | 0 (Low) | 21 (Medium) | 37 | 7 |
| July | 2 (Low) | 3 (Low) | 10 (Low) | 3 (Low) | 30 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 7 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 20 | 4 |
| August | 1 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 12 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 26 | 2 |
| September | 5 (Low) | 10 (Low) | 4 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 11 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 10 | 3 |
| October | 80 (Medium) | 6 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 20 (Medium) | 0 (Low) | 11 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 | 3 |
| November | 51 (Medium) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 3 |
| December | 58 (Medium) | 1 (Low) | 3 (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) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 2 |