Normally, the average daily temperature in Arroyo Grande right-through August is 18 with a general average high of 26 and lows being 13. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 18 |
| High Temperature | 26 |
| Low Temperature | 13 |
Useful Links: Arroyo Grande Weather: Average Weather & Yearly Climate