| 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 | 525 (Very high) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 180 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 6 | 2 |
| February | 699 (Very high) | 1 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 97 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 236 (Very high) | 0 (Low) | 340 (Very high) | 2 (Low) | 5 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 21 (Medium) | 2 | 4 |
| March | 241 (Very high) | 2,600 (Very high) | 8 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 12 (Low) | 55 (High) | 26 (Medium) | 221 (Very high) | 0 (Low) | 11 (Low) | 6 (Low) | 6 (Low) | 46 (Medium) | 6 | 3 |
| April | 21 (Low) | 2,705 (Very high) | 9 (Low) | 79 (High) | 13 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 72 (High) | 20 (Medium) | 36 (Medium) | 61 (High) | 6 (Low) | 343 (Very high) | 8 (Low) | 7 (Low) | 86 (High) | 11 | 11 |
| May | 15 (Low) | 135 (High) | 582 (Very high) | 124 (Very high) | 267 (High) | 10 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 274 (Very high) | 0 (Low) | 242 (Very high) | 6 (Low) | 4 (Low) | 821 (Very high) | 57 (High) | 7 (Low) | 41 (Medium) | 38 | 12 |
| June | 22 (Low) | 23 (Low) | 404 (Very high) | 50 (High) | 563 (Very high) | 8 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 6 (Low) | 16 (Medium) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 323 (Very high) | 0 (Low) | 7 (Low) | 290 (Very high) | 48 (Medium) | 0 (Low) | 15 (Medium) | 24 | 10 |
| July | 4 (Low) | 9 (Low) | 95 (High) | 7 (Low) | 15 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 19 (Medium) | 4 (Low) | 0 (Low) | 1 (Low) | 65 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 23 (Medium) | 0 (Low) | 8 (Low) | 13 (Low) | 4 (Low) | 0 (Low) | 11 (Low) | 33 | 6 |
| August | 2 (Low) | 3 (Low) | 11 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 13 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 29 | 4 |
| September | 2 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 10 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 | 2 |
| October | 10 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| November | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 1 |
| December | 17 (Low) | 2 (Low) | 2 (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) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |