| 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 | 94 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 38 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| February | 452 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1,284 (Very high) | 0 (Low) | 12 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 4 | 2 |
| March | 43 (Medium) | 4 (Low) | 7 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 50 (High) | 0 (Low) | 11 (Low) | 6 (Low) | 42 (Medium) | 0 (Low) | 10 (Low) | 5 (Low) | 5 (Low) | 17 (Medium) | 2 | 3 |
| April | 5 (Low) | 28 (Low) | 8 (Low) | 21 (Medium) | 0 (Low) | 14 (Low) | 0 (Low) | 2 (Low) | 45 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 32 (Medium) | 5 (Low) | 64 (High) | 14 (Low) | 2 (Low) | 48 (Medium) | 7 (Low) | 6 (Low) | 7 (Low) | 10 | 4 |
| May | 1 (Low) | 2 (Low) | 129 (High) | 55 (High) | 45 (Low) | 2 (Low) | 92 (High) | 0 (Low) | 518 (Very high) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 86 (High) | 0 (Low) | 3 (Low) | 1,327 (Very high) | 61 (High) | 1 (Low) | 4 (Low) | 18 | 2 |
| June | 250 (Very high) | 2 (Low) | 289 (Very high) | 109 (Very high) | 92 (Medium) | 11 (Low) | 148 (Very high) | 1 (Low) | 178 (Very high) | 1 (Low) | 3 (Low) | 36 (Medium) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1,007 (Very high) | 0 (Low) | 10 (Low) | 856 (Very high) | 124 (Very high) | 3 (Low) | 22 (Medium) | 19 | 5 |
| July | 21 (Low) | 1 (Low) | 90 (High) | 29 (Medium) | 33 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 21 (Medium) | 11 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 67 (High) | 0 (Low) | 5 (Low) | 76 (High) | 10 (Low) | 0 (Low) | 16 (Medium) | 55 | 3 |
| August | 2 (Low) | 0 (Low) | 52 (Medium) | 15 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 13 (Low) | 17 (Medium) | 3 (Low) | 0 (Low) | 4 (Low) | 3 | 1 |
| September | 0 (Low) | 0 (Low) | 59 (Medium) | 2 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 9 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 4 |
| October | 40 (Medium) | 0 (Low) | 250 (Very high) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 1 |
| November | 32 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| December | 25 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |