Prunedale, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 8.6 °C (low) to 18.9 °C (high). Annual precipitation averages 453.7 Millimeters. Prunedale is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °C | 15.9 °C | 88.14 mm |
| February | 6.1 °C | 16.3 °C | 88.65 mm |
| March | 6.7 °C | 17.2 °C | 62.99 mm |
| April | 7.3 °C | 18.1 °C | 35.05 mm |
| May | 9.2 °C | 19.2 °C | 11.94 mm |
| June | 10.7 °C | 20.1 °C | 2.79 mm |
| July | 12.2 °C | 20.3 °C | 1.02 mm |
| August | 12.5 °C | 21.1 °C | 1.27 mm |
| September | 11.7 °C | 22.1 °C | 2.03 mm |
| October | 9.4 °C | 21.9 °C | 21.34 mm |
| November | 6.9 °C | 18.7 °C | 47.75 mm |
| December | 5 °C | 15.7 °C | 90.68 mm |
| Annual | 8.6 °C | 18.9 °C | 453.65 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |