Average temperatures within Surabaya during the time of September is 21 with the high being 28 and lows being 16. See our table below for a full breakdown:
| Month | Degrees Celsius |
|---|---|
| Temperature | 21 |
| High Temperature | 28 |
| Low Temperature | 16 |
| Sunshine Per Day | 9 |
Useful Links: Surabaya Weather: Average Weather & Yearly Climate