| 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 | 2,031 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 60 (High) | 0 (Low) | 8 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| February | 236 (Very high) | 0 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 55 (High) | 1 (Low) | 16 (Medium) | 0 (Low) | 6 (Low) | 3 (Low) | 9 (Low) | 6 (Low) | 0 | 0 |
| March | 1,194 (Very high) | 986 (Very high) | 11 (Low) | 4 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 57 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 48 (Medium) | 29 (Medium) | 41 (Medium) | 4 (Low) | 151 (Very high) | 0 (Low) | 88 (High) | 3 (Low) | 17 (Medium) | 12 (Low) | 1 | 0 |
| April | 9 (Low) | 1,306 (Very high) | 21 (Low) | 28 (Medium) | 7 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 11 (Low) | 209 (Very high) | 3 (Low) | 75 (High) | 6 (Low) | 3 (Low) | 869 (Very high) | 6 (Low) | 5 (Low) | 35 (Medium) | 1 | 0 |
| May | 32 (Medium) | 3 (Low) | 465 (Very high) | 62 (High) | 303 (High) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 14 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 135 (Very high) | 0 (Low) | 19 (Medium) | 1,582 (Very high) | 36 (Medium) | 0 (Low) | 20 (Medium) | 5 | 0 |
| June | 14 (Low) | 1 (Low) | 121 (High) | 11 (Low) | 49 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 7 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 165 (Very high) | 40 (Medium) | 7 (Low) | 196 (Very high) | 15 (Medium) | 0 (Low) | 12 (Low) | 6 | 2 |
| July | 1 (Low) | 1 (Low) | 42 (Medium) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 3 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 35 (Medium) | 2 (Low) | 0 (Low) | 10 (Low) | 12 | 5 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 0 |
| October | 3 (Low) | 1 (Low) | 2 (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) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| November | 264 (Very high) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| December | 194 (High) | 0 (Low) | 3 (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) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |