Generally, you can anticipate the weather in Monterey Bay during September is 16. You can expect highs around 24 with low temperatures being around 12. We have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 16 |
| High Temperature | 24 |
| Low Temperature | 12 |
Useful Links: Monterey Bay Weather: Average Weather & Yearly Climate