| 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 | 698 (Very high) | 8 (Low) | 8 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 33 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 70 (High) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 | 4 |
| February | 2,208 (Very high) | 0 (Low) | 15 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 109 (Very high) | 0 (Low) | 200 (Very high) | 1 (Low) | 14 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 3 | 6 |
| March | 1,011 (Very high) | 7,111 (Very high) | 17 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 84 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 46 (Medium) | 161 (Very high) | 44 (Medium) | 55 (High) | 73 (High) | 1 (Low) | 12 (Low) | 5 (Low) | 5 (Low) | 19 (Medium) | 10 | 14 |
| April | 92 (High) | 991 (Very high) | 18 (Low) | 19 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 386 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 107 (Very high) | 2 (Low) | 68 (High) | 14 (Low) | 2 (Low) | 288 (Very high) | 10 (Low) | 14 (Low) | 42 (Medium) | 8 | 15 |
| May | 86 (Medium) | 25 (Low) | 171 (Very high) | 99 (High) | 173 (Medium) | 3 (Low) | 1 (Low) | 0 (Low) | 285 (Very high) | 1 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 195 (Very high) | 0 (Low) | 8 (Low) | 535 (Very high) | 31 (Medium) | 19 (Medium) | 11 (Low) | 33 | 14 |
| June | 11 (Low) | 2 (Low) | 56 (Medium) | 16 (Low) | 147 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 16 (Medium) | 12 (Low) | 0 (Low) | 9 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 93 (High) | 0 (Low) | 8 (Low) | 246 (Very high) | 9 (Low) | 0 (Low) | 5 (Low) | 14 | 6 |
| July | 3 (Low) | 1 (Low) | 7 (Low) | 5 (Low) | 9 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 35 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 9 | 10 |
| August | 2 (Low) | 2 (Low) | 4 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 22 (Medium) | 10 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 9 | 2 |
| September | 2 (Low) | 5 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 14 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 | 4 |
| October | 26 (Low) | 35 (Medium) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 14 | 2 |
| November | 6 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 | 1 |
| December | 46 (Medium) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 1 | 3 |