| 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 | 881 (Very high) | 5 (Low) | 15 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 30 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 12 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 5 |
| February | 2,096 (Very high) | 2 (Low) | 21 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 74 (High) | 0 (Low) | 1,926 (Very high) | 2 (Low) | 32 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 17 (Medium) | 2 | 3 |
| March | 793 (Very high) | 7,238 (Very high) | 20 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 79 (High) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 31 (Medium) | 146 (Very high) | 326 (Very high) | 89 (High) | 199 (Very high) | 2 (Low) | 61 (High) | 2 (Low) | 4 (Low) | 32 (Medium) | 42 | 6 |
| April | 46 (Medium) | 773 (Very high) | 9 (Low) | 16 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 93 (High) | 7 (Low) | 84 (High) | 19 (Medium) | 2 (Low) | 295 (Very high) | 7 (Low) | 6 (Low) | 15 (Medium) | 11 | 5 |
| May | 69 (Medium) | 20 (Low) | 113 (High) | 99 (High) | 72 (Medium) | 7 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 33 (Medium) | 2 (Low) | 253 (Very high) | 0 (Low) | 4 (Low) | 1,066 (Very high) | 20 (Medium) | 2 (Low) | 10 (Low) | 19 | 10 |
| June | 15 (Low) | 5 (Low) | 64 (Medium) | 13 (Low) | 166 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 12 (Low) | 0 (Low) | 18 (Medium) | 6 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 394 (Very high) | 0 (Low) | 17 (Medium) | 685 (Very high) | 17 (Medium) | 0 (Low) | 7 (Low) | 27 | 6 |
| July | 7 (Low) | 7 (Low) | 22 (Low) | 4 (Low) | 12 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 9 (Low) | 0 (Low) | 14 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 3 (Low) | 52 | 7 |
| August | 2 (Low) | 16 (Low) | 9 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 16 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 34 | 4 |
| September | 3 (Low) | 11 (Low) | 8 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 10 (Low) | 0 (Low) | 14 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 7 | 3 |
| October | 13 (Low) | 4 (Low) | 4 (Low) | 2 (Low) | 1 (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) | 4 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 11 | 3 |
| November | 4 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 | 1 |
| December | 37 (Medium) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 4 | 2 |