| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive |
|---|---|---|---|---|---|
| January | 858 (Very high) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) |
| February | 978 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) |
| March | 1,494 (Very high) | 929 (Very high) | 18 (Low) | 3 (Low) | 10 (Low) |
| April | 8 (Low) | 1,139 (Very high) | 29 (Low) | 35 (Medium) | 11 (Low) |
| May | 18 (Low) | 13 (Low) | 172 (Very high) | 62 (High) | 189 (Medium) |
| June | 21 (Low) | 30 (Medium) | 168 (Very high) | 31 (Medium) | 133 (Medium) |
| July | 2 (Low) | 0 (Low) | 63 (Medium) | 4 (Low) | 8 (Low) |
| August | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 3 (Low) |
| September | 1 (Low) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) |
| October | 43 (Medium) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) |
| November | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) |
| December | 151 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) |