| 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 | 134 (High) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 47 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | — | 1 |
| February | 994 (Very high) | 0 (Low) | 22 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 55 (High) | 0 (Low) | 290 (Very high) | 2 (Low) | 295 (Very high) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 0 | 4 |
| March | 1,409 (Very high) | 1,876 (Very high) | 13 (Low) | 4 (Low) | 1 (Low) | 18 (Medium) | 0 (Low) | 3 (Low) | 329 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 20 (Medium) | 149 (Very high) | 16 (Medium) | 135 (Very high) | 134 (Very high) | 1 (Low) | 123 (Very high) | 6 (Low) | 2 (Low) | 30 (Medium) | 6 | 12 |
| April | 8 (Low) | 208 (High) | 26 (Low) | 22 (Medium) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1,194 (Very high) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 2 (Low) | 231 (Very high) | 6 (Low) | 48 (Medium) | 0 (Low) | 1 (Low) | 758 (Very high) | 12 (Low) | 6 (Low) | 14 (Low) | 7 | 13 |
| May | 14 (Low) | 25 (Low) | 156 (Very high) | 42 (Medium) | 739 (Very high) | 3 (Low) | 1 (Low) | 1 (Low) | 21 (Medium) | 2 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 139 (Very high) | 0 (Low) | 17 (Medium) | 393 (Very high) | 40 (Medium) | 1 (Low) | 9 (Low) | 18 | 14 |
| June | 15 (Low) | 2 (Low) | 54 (Medium) | 16 (Low) | 188 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 182 (Very high) | 0 (Low) | 21 (Medium) | 103 (Very high) | 5 (Low) | 0 (Low) | 12 (Low) | 6 | 3 |
| July | 1 (Low) | 1 (Low) | 20 (Low) | 3 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 15 (Medium) | 11 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 6 | 3 |
| August | 13 (Low) | 1 (Low) | 9 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 45 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 | 2 |
| September | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 30 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 | 1 |
| October | 59 (Medium) | 2 (Low) | 7 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 | 2 |
| November | 6 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 | 2 |
| December | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |