| 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 | 526 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 89 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 | 1 |
| February | 1,159 (Very high) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 0 (Low) | 541 (Very high) | 1 (Low) | 64 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 | 2 |
| March | 697 (Very high) | 17,545 (Very high) | 9 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 73 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 9 (Low) | 210 (Very high) | 32 (Medium) | 120 (Very high) | 942 (Very high) | 2 (Low) | 12 (Low) | 0 (Low) | 5 (Low) | 21 (Medium) | 9 | 5 |
| April | 36 (Medium) | 22,056 (Very high) | 68 (Medium) | 12 (Low) | 6 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 491 (Very high) | 1 (Low) | 318 (Very high) | 29 (Medium) | 1 (Low) | 580 (Very high) | 5 (Low) | 6 (Low) | 46 (Medium) | 9 | 5 |
| May | 33 (Medium) | 80 (Medium) | 112 (High) | 32 (Medium) | 252 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 208 (Very high) | 0 (Low) | 11 (Low) | 1,652 (Very high) | 12 (Low) | 2 (Low) | 26 (Medium) | 23 | 16 |
| June | 9 (Low) | 18 (Low) | 74 (Medium) | 31 (Medium) | 49 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 25 (Medium) | 7 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 69 (High) | 11 (Low) | 6 (Low) | 118 (Very high) | 9 (Low) | 21 (Medium) | 14 (Low) | 10 | 4 |
| July | 15 (Low) | 8 (Low) | 34 (Medium) | 5 (Low) | 5 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 16 (Medium) | 7 (Low) | 1 (Low) | 2 (Low) | 9 (Low) | 11 | 5 |
| August | 2 (Low) | 3 (Low) | 4 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 19 (Medium) | 7 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 7 | 3 |
| September | 2 (Low) | 6 (Low) | 5 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 3 | 2 |
| October | 2 (Low) | 10 (Low) | 3 (Low) | 1 (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) | 2 (Low) | 0 (Low) | 9 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 8 | 3 |
| November | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 11 | 2 |
| December | 6 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 2 |