Girgaon boasts a year-around average temperature of 26.7°C, peaking at 29.1°C in May, its warmest month, and dipping to an average low of 24.0°C in January, February, the coolest. Rainfall averages at 184.2mm annually, with July seeing the heaviest showers and January, February, April, December being the driest month.
Month | Temperature (Celcius) | Rainfall (mm) |
| January | 24.0 | 0.0 |
| February | 24.0 | 0.0 |
| March | 25.8 | 3.3 |
| April | 27.8 | 0.0 |
| May | 29.1 | 75.2 |
| June | 28.5 | 589.8 |
| July | 27.2 | 675.6 |
| August | 26.9 | 482.3 |
| September | 27.0 | 301.2 |
| October | 27.7 | 60.5 |
| November | 26.9 | 22.9 |
| December | 25.3 | 0.0 |