| 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 | 1,106 (Very high) | 4 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 85 (High) | 0 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 | 2 |
| February | 282 (Very high) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 109 (Very high) | 0 (Low) | 168 (Very high) | 2 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 19 (Medium) | 1 | 2 |
| March | 147 (High) | 30 (Medium) | 6 (Low) | 4 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 11 (Low) | 28 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 54 (High) | 13 (Low) | 147 (Very high) | 1 (Low) | 4 (Low) | 7 (Low) | 7 (Low) | 33 (Medium) | 8 | 5 |
| April | 16 (Low) | 919 (Very high) | 17 (Low) | 23 (Medium) | 4 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 5 (Low) | 49 (Medium) | 2 (Low) | 85 (High) | 27 (Medium) | 3 (Low) | 146 (Very high) | 8 (Low) | 23 (Medium) | 24 (Medium) | 36 | 9 |
| May | 22 (Low) | 57 (Medium) | 302 (Very high) | 111 (Very high) | 130 (Medium) | 7 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 2 (Low) | 40 (Medium) | 1 (Low) | 98 (High) | 3 (Low) | 2 (Low) | 314 (Very high) | 37 (Medium) | 5 (Low) | 6 (Low) | 35 | 9 |
| June | 73 (Medium) | 17 (Low) | 251 (Very high) | 28 (Medium) | 572 (Very high) | 1 (Low) | 59 (High) | 1 (Low) | 7 (Low) | 1 (Low) | 2 (Low) | 14 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 332 (Very high) | 0 (Low) | 7 (Low) | 138 (Very high) | 24 (Medium) | 1 (Low) | 10 (Low) | 58 | 5 |
| July | 29 (Low) | 19 (Low) | 68 (Medium) | 11 (Low) | 96 (Medium) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 10 (Low) | 0 (Low) | 2 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 61 (High) | 0 (Low) | 7 (Low) | 22 (Medium) | 3 (Low) | 0 (Low) | 13 (Low) | 39 | 4 |
| August | 1 (Low) | 12 (Low) | 10 (Low) | 3 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 15 (Medium) | 7 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 41 | 4 |
| September | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| October | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| November | 6 (Low) | 8 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 49 (Medium) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 1 |
| December | 42 (Medium) | 4 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 2 |