More often than not you can expect weather in Gampaha for the duration of September is 26 with a high of 30 with lows about 25. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 26 |
| High Temperature | 30 |
| Low Temperature | 25 |
Useful Links: Gampaha Weather: Average Weather & Yearly Climate