Normally, you can expect the weather in Santa Monica for the duration of September is 19 with a normal high in the month being 24 and lows being 17 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 19 |
| High Temperature | 24 |
| Low Temperature | 17 |
Useful Links: Santa Monica Weather: Average Weather & Yearly Climate