| 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 | 1,889 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 79 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 2 |
| February | 239 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 72 (High) | 0 (Low) | 20 (Medium) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 0 | 3 |
| March | 500 (Very high) | 168 (High) | 12 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 3 (Low) | 1 (Low) | 77 (High) | 1 (Low) | 8 (Low) | 7 (Low) | 212 (Very high) | 1 (Low) | 6 (Low) | 2 (Low) | 22 (Medium) | 15 (Medium) | 8 | 11 |
| April | 19 (Low) | 1,704 (Very high) | 16 (Low) | 47 (Medium) | 6 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 14 (Low) | 89 (High) | 1 (Low) | 62 (High) | 22 (Medium) | 6 (Low) | 1,706 (Very high) | 13 (Low) | 9 (Low) | 36 (Medium) | 29 | 28 |
| May | 43 (Medium) | 13 (Low) | 308 (Very high) | 90 (High) | 218 (High) | 5 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 23 (Medium) | 1 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 237 (Very high) | 0 (Low) | 4 (Low) | 1,960 (Very high) | 22 (Medium) | 7 (Low) | 14 (Low) | 19 | 56 |
| June | 24 (Low) | 2 (Low) | 68 (Medium) | 17 (Low) | 38 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 11 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 103 (Very high) | 0 (Low) | 6 (Low) | 93 (High) | 8 (Low) | 0 (Low) | 17 (Medium) | 15 | 17 |
| July | 3 (Low) | 1 (Low) | 63 (Medium) | 7 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 12 (Low) | 18 (Medium) | 4 (Low) | 0 (Low) | 11 (Low) | 6 | 24 |
| August | 2 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 11 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 4 | 13 |
| September | 1 (Low) | 2 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 | 7 |
| October | 26 (Low) | 3 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 | 4 |
| November | 345 (Very high) | 2 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 4 |
| December | 1,089 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 0 (Low) | 6 (Low) | 1 | 5 |