| ANNUAL RAINFALL - 1977 | |||||||||
| Sl. No. | Month | Pondicherry | Karaikal | Mahe | Yanam | ||||
| Days | Rainfall | Days | Rainfall | Days | Rainfall | Days | Rainfall | ||
| 1 | January | 3 | 16.60 | 2 | 15.50 | - | - | 1 | 16.00 |
| 2 | February | 3 | 6.80 | 3 | 20.90 | 2 | 27.00 | - | - |
| 3 | March | - | - | 3 | 17.80 | 1 | 10.00 | - | - |
| 4 | April | 2 | 2.20 | 2 | 14.60 | 2 | 4.80 | 1 | 4.00 |
| 5 | May | 5 | 63.20 | 6 | 73.30 | 16 | 273.60 | 4 | 37.60 |
| 6 | June | 6 | 38.60 | 4 | 101.60 | 28 | 799.20 | 5 | 135.90 |
| 7 | July | 9 | 25.40 | 5 | 27.80 | 30 | 1234.00 | 13 | 183.00 |
| 8 | August | 8 | 199.40 | 12 | 86.70 | 20 | 268.80 | 10 | 136.00 |
| 9 | September | 8 | 92.80 | 5 | 67.10 | 15 | 171.40 | 4 | 103.80 |
| 10 | October | 22 | 570.40 | 23 | 436.40 | 21 | 315.80 | 7 | 132.80 |
| 11 | November | 23 | 561.00 | 15 | 422.50 | 16 | 412.20 | 10 | 241.00 |
| 12 | December | 6 | 31.40 | 9 | 45.20 | - | - | - | - |
| Total | 95 | 1607.80 | 89 | 1329.40 | 151 | 3516.80 | 55 | 990.10 | |
| 1608 | 1329 | 3517 | 990 | ||||||
| REGIONWISE RAINFALL PARTICULARS OF PONDICHERRY REGION FOR THE YEAR 1977-78 | |||||||||
| Sl. No. | Month/ | Pondicherry | Karaikal | Mahe | Yanam | ||||
| Season | Days | Rainfall | Days | Rainfall | Days | Rainfall | Days | Rainfall | |
| 1 | June | 6 | 38.6 | 4 | 101.6 | 28 | 799.2 | 5 | 135.9 |
| 2 | July | 9 | 25.4 | 5 | 27.8 | 30 | 1234 | 13 | 183 |
| 3 | August | 8 | 199.4 | 12 | 86.7 | 20 | 268.8 | 10 | 136 |
| 4 | September | 8 | 92.8 | 5 | 67.1 | 15 | 171.4 | 4 | 103.8 |
| South West | 31 | 356.20 | 26 | 283.20 | 93 | 2473.40 | 32 | 558.70 | |
| Monsoon | |||||||||
| 5 | October | 22 | 570.4 | 23 | 436.4 | 21 | 315.8 | 7 | 132.8 |
| 6 | November | 23 | 561 | 15 | 422.5 | 16 | 412.2 | 10 | 241 |
| 7 | December | 6 | 31.4 | 9 | 45.2 | - | - | - | - |
| North East | 51 | 1162.80 | 47 | 904.10 | 37 | 728.00 | 17 | 373.80 | |
| Monsoon | |||||||||
| 8 | January | 1 | 3.6 | - | - | - | - | 3 | 0.5 |
| 9 | February | - | - | - | - | - | - | 1 | 3 |
| Winter | 1 | 3.60 | 0 | 0.00 | 0 | 0.00 | 4 | 3.50 | |
| Period | |||||||||
| 10 | March | - | - | - | - | - | - | - | - |
| 11 | April | 2 | 2.6 | 1 | 61.5 | - | - | 3 | 8.8 |
| 12 | May | 3 | 9.2 | 1 | 4.3 | 19 | 543.8 | 1 | 4.2 |
| Hot Weather | 5 | 11.80 | 2 | 65.80 | 19 | 543.80 | 4 | 13.00 | |
| Period | |||||||||
| Annual | 88 | 1534.40 | 75 | 1253.10 | 149 | 3745.20 | 57 | 949.00 | |
| Total | |||||||||
| 1534 | 1253 | 3745 | 949 | ||||||