Station | Parameter | Jan. | Feb. | Mar. | April | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Year |
Calabar | P | 40 | 71 | 161 | 222 | 306 | 419 | 449 | 411 | 421 | 325 | 188 | 50 | 3063 |
PET | 80 | 85 | 91 | 85 | 79 | 64 | 53 | 51 | 58 | 69 | 76 | 83 | 887 | |
P-PET | −40 | −14 | 70 | 137 | 227 | 355 | 396 | 360 | 363 | 256 | 112 | −33 | 2176 |