| 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 | 358 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 81 (High) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 7 |
| February | 199 (High) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 56 (High) | 0 (Low) | 40 (Medium) | 1 (Low) | 17 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 4 |
| March | 234 (Very high) | 382 (Very high) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 21 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 43 (Medium) | 68 (High) | 254 (Very high) | 0 (Low) | 7 (Low) | 3 (Low) | 9 (Low) | 21 (Medium) | 3 | 4 |
| April | 9 (Low) | 245 (High) | 5 (Low) | 28 (Medium) | 0 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 269 (Very high) | 3 (Low) | 136 (Very high) | 43 (Medium) | 1 (Low) | 104 (Very high) | 5 (Low) | 17 (Medium) | 33 (Medium) | 8 | 18 |
| May | 4 (Low) | 11 (Low) | 73 (Medium) | 32 (Medium) | 80 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 50 (High) | 0 (Low) | 2 (Low) | 198 (Very high) | 13 (Low) | 1 (Low) | 7 (Low) | 13 | 12 |
| June | 9 (Low) | 0 (Low) | 77 (Medium) | 14 (Low) | 113 (Medium) | 1 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 84 (High) | 0 (Low) | 4 (Low) | 50 (High) | 6 (Low) | 0 (Low) | 8 (Low) | 9 | 31 |
| July | 2 (Low) | 0 (Low) | 23 (Low) | 2 (Low) | 17 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 10 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 5 | 23 |
| August | 1 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 17 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 19 |
| September | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 25 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 | 22 |
| October | 15 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 | 14 |
| November | 18 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 7 |
| December | 29 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 4 |