Generally, the weather in Whitsundays during September is 21. You can expect a high of 25 degrees and a low of 20 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 21 |
| High Temperature | 25 |
| Low Temperature | 20 |
Useful Links: Whitsundays Weather: Average Weather & Yearly Climate