| 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 | 184 (High) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 | 5 |
| February | 179 (High) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 1 (Low) | 332 (Very high) | 4 (Low) | 163 (Very high) | 0 (Low) | 8 (Low) | 4 (Low) | 1 (Low) | 10 (Low) | 0 | 11 |
| March | 1,000 (Very high) | 1,878 (Very high) | 19 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 137 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 230 (Very high) | 234 (Very high) | 3 (Low) | 158 (Very high) | 0 (Low) | 28 (Medium) | 5 (Low) | 1 (Low) | 13 (Low) | 3 | 15 |
| April | 27 (Low) | 3,205 (Very high) | 88 (High) | 75 (High) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 615 (Very high) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 402 (Very high) | 2 (Low) | 59 (High) | 50 (High) | 2 (Low) | 117 (Very high) | 16 (Medium) | 24 (Medium) | 7 (Low) | 24 | 21 |
| May | 13 (Low) | 0 (Low) | 208 (Very high) | 86 (High) | 377 (High) | 0 (Low) | 80 (High) | 0 (Low) | 585 (Very high) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 99 (High) | 0 (Low) | 15 (Medium) | 397 (Very high) | 40 (Medium) | 10 (Low) | 5 (Low) | 817 | 26 |
| June | 2 (Low) | 0 (Low) | 42 (Medium) | 3 (Low) | 107 (Medium) | 0 (Low) | 12 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 106 (Very high) | 0 (Low) | 10 (Low) | 65 (High) | 2 (Low) | 0 (Low) | 8 (Low) | 11 | 12 |
| July | 2 (Low) | 1 (Low) | 10 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 15 (Medium) | 13 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 9 | 5 |
| August | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 16 (Medium) | 10 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 4 | 5 |
| September | 2 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 51 (High) | 6 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 | 5 |
| October | 34 (Medium) | 0 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 7 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 3 | 5 |
| November | 42 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 3 |
| December | 85 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 | 3 |