| 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 | 1,649 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 35 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 2 |
| February | 1,798 (Very high) | 0 (Low) | 15 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 0 (Low) | 436 (Very high) | 1 (Low) | 44 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 | 3 |
| March | 4,489 (Very high) | 3,623 (Very high) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 116 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 41 (Medium) | 64 (High) | 378 (Very high) | 94 (High) | 701 (Very high) | 0 (Low) | 56 (High) | 1 (Low) | 11 (Low) | 29 (Medium) | 5 | 19 |
| April | 43 (Medium) | 6,990 (Very high) | 56 (Medium) | 23 (Medium) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 55 (High) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 487 (Very high) | 1 (Low) | 500 (Very high) | 12 (Low) | 2 (Low) | 962 (Very high) | 10 (Low) | 4 (Low) | 56 (High) | 12 | 19 |
| May | 64 (Medium) | 21 (Low) | 437 (Very high) | 49 (Medium) | 247 (High) | 2 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 68 (High) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 601 (Very high) | 0 (Low) | 12 (Low) | 1,686 (Very high) | 15 (Medium) | 0 (Low) | 16 (Medium) | 24 | 24 |
| June | 18 (Low) | 0 (Low) | 105 (High) | 20 (Medium) | 59 (Medium) | 0 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 5 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 102 (Very high) | 0 (Low) | 9 (Low) | 167 (Very high) | 7 (Low) | 0 (Low) | 17 (Medium) | 10 | 8 |
| July | 8 (Low) | 0 (Low) | 46 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 20 (Medium) | 7 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 0 (Low) | 14 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 6 (Low) | 8 | 6 |
| August | 1 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 26 (Medium) | 9 (Low) | 1 (Low) | 0 (Low) | 11 (Low) | 6 | 2 |
| September | 3 (Low) | 2 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 16 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 6 | 2 |
| October | 7 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 1 |
| November | 128 (High) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 | 1 |
| December | 546 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |