Pismo Beach, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 9.9 °C (low) to 20.2 °C (high). Annual precipitation averages 402.1 Millimeters. Pismo Beach is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.6 °C | 18.1 °C | 78.49 mm |
| February | 7.8 °C | 18.1 °C | 90.17 mm |
| March | 8.2 °C | 18.7 °C | 72.64 mm |
| April | 8.7 °C | 20.1 °C | 21.08 mm |
| May | 9.8 °C | 19.9 °C | 9.65 mm |
| June | 11.2 °C | 21.2 °C | 2.54 mm |
| July | 12.7 °C | 21.2 °C | 2.03 mm |
| August | 12.7 °C | 21.6 °C | 0.51 mm |
| September | 12.1 °C | 22.3 °C | 2.03 mm |
| October | 11 °C | 22.3 °C | 17.78 mm |
| November | 9.2 °C | 20.4 °C | 38.1 mm |
| December | 7.2 °C | 18 °C | 67.06 mm |
| Annual | 9.9 °C | 20.2 °C | 402.08 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |