| 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 | 557 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 30 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 2 | 4 |
| February | 400 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 1 (Low) | 116 (Very high) | 5 (Low) | 66 (High) | 0 (Low) | 7 (Low) | 7 (Low) | 0 (Low) | 26 (Medium) | 1 | 10 |
| March | 153 (High) | 584 (Very high) | 7 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 37 (Medium) | 0 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 40 (Medium) | 12 (Low) | 25 (Medium) | 83 (High) | 0 (Low) | 16 (Medium) | 5 (Low) | 7 (Low) | 27 (Medium) | 3 | 15 |
| April | 7 (Low) | 3,486 (Very high) | 27 (Low) | 46 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 99 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 185 (Very high) | 17 (Medium) | 56 (High) | 27 (Medium) | 1 (Low) | 155 (Very high) | 16 (Medium) | 10 (Low) | 28 (Medium) | 9 | 26 |
| May | 29 (Low) | 21 (Low) | 496 (Very high) | 75 (High) | 387 (High) | 4 (Low) | 2 (Low) | 0 (Low) | 181 (Very high) | 0 (Low) | 1 (Low) | 29 (Medium) | 0 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 22 (Medium) | 10 (Low) | 57 (High) | 0 (Low) | 16 (Medium) | 361 (Very high) | 51 (High) | 51 (High) | 42 (Medium) | 55 | 40 |
| June | 36 (Medium) | 0 (Low) | 536 (Very high) | 42 (Medium) | 1,080 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 136 (Very high) | 0 (Low) | 5 (Low) | 24 (Medium) | 0 (Low) | 18 (Medium) | 5 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 284 (Very high) | 0 (Low) | 24 (Medium) | 134 (Very high) | 90 (High) | 0 (Low) | 22 (Medium) | 23 | 58 |
| July | 2 (Low) | 0 (Low) | 118 (High) | 3 (Low) | 21 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 15 (Medium) | 16 (Medium) | 2 (Low) | 0 (Low) | 9 (Low) | 5 | 12 |
| August | 1 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 20 (Medium) | 18 (Medium) | 2 (Low) | 0 (Low) | 3 (Low) | 4 | 8 |
| September | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 23 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 6 |
| October | 11 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 2 | 6 |
| November | 6 (Low) | 0 (Low) | 1 (Low) | 0 (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) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 3 |
| December | 26 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 | 3 |