| 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 | 99 (High) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 135 (Very high) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 1 | 4 |
| February | 489 (Very high) | 0 (Low) | 15 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 66 (High) | 0 (Low) | 48 (Medium) | 1 (Low) | 24 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 48 (Medium) | 8 | 4 |
| March | 39 (Medium) | 6,375 (Very high) | 9 (Low) | 5 (Low) | 22 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 36 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 39 (Medium) | 4 (Low) | 60 (High) | 54 (High) | 1 (Low) | 54 (High) | 3 (Low) | 4 (Low) | 45 (Medium) | 5 | 9 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | 12 (Low) | 6 (Low) | 72 (Medium) | 32 (Medium) | 747 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 172 (Very high) | 0 (Low) | 9 (Low) | 76 (High) | 9 (Low) | 2 (Low) | 14 (Low) | 32 | 10 |
| June | 3 (Low) | 16 (Low) | 119 (High) | 30 (Medium) | 56 (Medium) | 1 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 29 (Medium) | 30 (Medium) | 0 (Low) | 2 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 7 (Low) | 24 (Medium) | 11 (Low) | 1 (Low) | 9 (Low) | 21 | 7 |
| July | 6 (Low) | 14 (Low) | 45 (Medium) | 7 (Low) | 9 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 20 (Medium) | 11 (Low) | 2 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 15 (Medium) | 6 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 22 | 6 |
| August | 10 (Low) | 9 (Low) | 5 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 21 | 3 |
| September | 9 (Low) | 9 (Low) | 6 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 35 (Medium) | 2 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 | 2 |
| October | 10 (Low) | 72 (Medium) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 2 | 6 |
| November | 22 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 1 | 1 |
| December | 740 (Very high) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 1 | 3 |