| 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 | 282 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 3 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 62 (High) | 0 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 1 | 8 |
| February | 275 (Very high) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 45 (Medium) | 0 (Low) | 138 (Very high) | 2 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 7 (Low) | 3 | 10 |
| March | 428 (Very high) | 2,852 (Very high) | 10 (Low) | 16 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 44 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 6 (Low) | 141 (Very high) | 185 (Very high) | 41 (Medium) | 357 (Very high) | 1 (Low) | 32 (Medium) | 11 (Low) | 5 (Low) | 38 (Medium) | 26 | 22 |
| April | 22 (Low) | 1,135 (Very high) | 20 (Low) | 22 (Medium) | 137 (Medium) | 11 (Low) | 1 (Low) | 0 (Low) | 38 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 10 (Low) | 82 (High) | 4 (Low) | 116 (Very high) | 20 (Medium) | 2 (Low) | 562 (Very high) | 6 (Low) | 18 (Medium) | 52 (High) | 47 | 22 |
| May | 23 (Low) | 7 (Low) | 33 (Medium) | 27 (Medium) | 473 (Very high) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 151 (Very high) | 0 (Low) | 3 (Low) | 223 (Very high) | 3 (Low) | 9 (Low) | 17 (Medium) | 36 | 13 |
| June | 3 (Low) | 1 (Low) | 16 (Low) | 56 (High) | 4 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 46 (Medium) | 5 (Low) | 0 (Low) | 6 (Low) | 5 | 2 |
| July | 2 (Low) | 0 (Low) | 31 (Medium) | 34 (Medium) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 75 (High) | 8 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 14 (Low) | 10 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 111 | 2 |
| August | 2 (Low) | 1 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 17 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 49 | 3 |
| September | 7 (Low) | 34 (Medium) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 12 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 5 | 1 |
| October | 10 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 14 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 6 (Low) | 1 | 1 |
| November | 1,105 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 | 16 |
| December | 384 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 | 1 |