| 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 | 1,319 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 39 (Medium) | 0 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 | 6 |
| February | 240 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 32 (Medium) | 9 (Low) | 312 (Very high) | 2 (Low) | 70 (High) | 1 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 3 | 5 |
| March | 808 (Very high) | 603 (Very high) | 9 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 214 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 15 (Medium) | 42 (Medium) | 55 (High) | 11 (Low) | 93 (High) | 0 (Low) | 18 (Medium) | 5 (Low) | 6 (Low) | 12 (Low) | 3 | 10 |
| April | 4 (Low) | 1,127 (Very high) | 37 (Medium) | 39 (Medium) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 863 (Very high) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 775 (Very high) | 2 (Low) | 94 (High) | 4 (Low) | 1 (Low) | 423 (Very high) | 12 (Low) | 3 (Low) | 13 (Low) | 45 | 25 |
| May | 18 (Low) | 0 (Low) | 444 (Very high) | 99 (High) | 218 (High) | 4 (Low) | 135 (Very high) | 0 (Low) | 957 (Very high) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 101 (Very high) | 0 (Low) | 8 (Low) | 378 (Very high) | 29 (Medium) | 14 (Low) | 12 (Low) | 25 | 30 |
| June | 6 (Low) | 0 (Low) | 94 (High) | 9 (Low) | 64 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 39 (Medium) | 1 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 82 (High) | 0 (Low) | 22 (Medium) | 43 (Medium) | 6 (Low) | 0 (Low) | 4 (Low) | 9 | 8 |
| July | 2 (Low) | 2 (Low) | 25 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 16 (Medium) | 13 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 4 | 7 |
| August | 2 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 17 (Medium) | 6 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 2 | 3 |
| September | 2 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 14 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 4 |
| October | 4 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 | 3 |
| November | 151 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 4 |
| December | 734 (Very high) | 0 (Low) | 3 (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) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 | 5 |