San Pablo, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 10.1 °C (low) to 19.2 °C (high). Annual precipitation averages 600.5 Millimeters. San Pablo is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.6 °C | 13.6 °C | 119.63 mm |
| February | 7.4 °C | 15.6 °C | 123.19 mm |
| March | 8.3 °C | 17.3 °C | 85.85 mm |
| April | 9.2 °C | 18.7 °C | 36.32 mm |
| May | 10.7 °C | 20.4 °C | 18.8 mm |
| June | 12.2 °C | 22.3 °C | 4.57 mm |
| July | 13 °C | 22.4 °C | 0 mm |
| August | 13.4 °C | 22.9 °C | 1.02 mm |
| September | 13.1 °C | 23.7 °C | 2.03 mm |
| October | 11.5 °C | 22.4 °C | 24.38 mm |
| November | 8.9 °C | 17.7 °C | 60.2 mm |
| December | 6.6 °C | 13.8 °C | 124.46 mm |
| Annual | 10.1 °C | 19.2 °C | 600.45 mm |
| Average First Frost Date | No Frost |
| 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 |