| 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 | 909 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 70 (High) | 0 (Low) | 20 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 | 1 |
| February | 3,079 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 56 (High) | 0 (Low) | 661 (Very high) | 3 (Low) | 141 (Very high) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 12 (Low) | 1 | 5 |
| March | 3,076 (Very high) | 16,448 (Very high) | 11 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 121 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 30 (Medium) | 163 (Very high) | 333 (Very high) | 326 (Very high) | 366 (Very high) | 2 (Low) | 16 (Medium) | 4 (Low) | 11 (Low) | 34 (Medium) | 11 | 15 |
| April | 80 (Medium) | 2,045 (Very high) | 11 (Low) | 15 (Low) | 2 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 26 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 191 (Very high) | 5 (Low) | 225 (Very high) | 12 (Low) | 1 (Low) | 474 (Very high) | 4 (Low) | 8 (Low) | 25 (Medium) | 22 | 15 |
| May | 73 (Medium) | 87 (Medium) | 178 (Very high) | 63 (High) | 133 (Medium) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 22 (Medium) | 1 (Low) | 0 (Low) | 26 (Medium) | 1 (Low) | 1,200 (Very high) | 1 (Low) | 9 (Low) | 1,573 (Very high) | 41 (Medium) | 9 (Low) | 20 (Medium) | 24 | 19 |
| June | 67 (Medium) | 6 (Low) | 61 (Medium) | 20 (Medium) | 181 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 10 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 260 (Very high) | 0 (Low) | 20 (Medium) | 569 (Very high) | 14 (Low) | 2 (Low) | 13 (Low) | 11 | 11 |
| July | 5 (Low) | 1 (Low) | 18 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 0 (Low) | 6 (Low) | 35 (Medium) | 1 (Low) | 0 (Low) | 2 (Low) | 7 | 2 |
| August | 9 (Low) | 27 (Low) | 9 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 25 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 21 (Medium) | 30 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 5 | 1 |
| September | 3 (Low) | 2 (Low) | 9 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 6 (Low) | 0 (Low) | 15 (Medium) | 8 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 | 2 |
| October | 8 (Low) | 8 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 3 | 3 |
| November | 3 (Low) | 1 (Low) | 1 (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) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 | 2 |
| December | 36 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 1 | 1 |