| 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 | 197 (High) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 99 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |
| February | 313 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 57 (High) | 0 (Low) | 332 (Very high) | 24 (Medium) | 39 (Medium) | 0 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 7 (Low) | 1 | 9 |
| March | 484 (Very high) | 2,334 (Very high) | 8 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 144 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 182 (Very high) | 52 (High) | 62 (High) | 198 (Very high) | 0 (Low) | 65 (High) | 8 (Low) | 8 (Low) | 36 (Medium) | 6 | 15 |
| April | 13 (Low) | 1,554 (Very high) | 58 (Medium) | 31 (Medium) | 93 (Medium) | 10 (Low) | 12 (Low) | 0 (Low) | 973 (Very high) | 0 (Low) | 4 (Low) | 6 (Low) | 3 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 530 (Very high) | 17 (Medium) | 151 (Very high) | 3 (Low) | 4 (Low) | 438 (Very high) | 31 (Medium) | 9 (Low) | 6 (Low) | 23 | 24 |
| May | 13 (Low) | 0 (Low) | 112 (High) | 30 (Medium) | 611 (Very high) | 0 (Low) | 20 (Medium) | 1 (Low) | 30 (Medium) | 0 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 43 (Medium) | 90 (High) | 20 (Medium) | 187 (Very high) | 11 (Low) | 1 (Low) | 5 (Low) | 46 | 20 |
| June | 6 (Low) | 0 (Low) | 48 (Medium) | 6 (Low) | 50 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 18 (Medium) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 12 (Low) | 0 (Low) | 23 (Medium) | 38 (Medium) | 6 (Low) | 0 (Low) | 4 (Low) | 13 | 11 |
| July | 4 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 11 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 6 | 7 |
| August | 1 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 28 (Medium) | 8 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 3 | 4 |
| September | 6 (Low) | 0 (Low) | 17 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 22 (Medium) | 4 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 3 | 6 |
| October | 19 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 | 5 |
| November | 10 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 11 | 2 |
| December | 87 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 7 |