Dublin, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 8.9 °C (low) to 22.5 °C (high). Annual precipitation averages 545.6 Millimeters. Dublin is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °C | 14.2 °C | 105.66 mm |
| February | 5.3 °C | 16.2 °C | 113.03 mm |
| March | 6.4 °C | 18.2 °C | 80.26 mm |
| April | 7.7 °C | 20.6 °C | 43.69 mm |
| May | 10.1 °C | 23.8 °C | 18.03 mm |
| June | 11.9 °C | 27.6 °C | 3.56 mm |
| July | 13.5 °C | 30.7 °C | 0 mm |
| August | 13.6 °C | 30.6 °C | 0.76 mm |
| September | 12.7 °C | 29.6 °C | 1.78 mm |
| October | 10.2 °C | 25.3 °C | 24.89 mm |
| November | 6.5 °C | 18.6 °C | 52.83 mm |
| December | 4.2 °C | 14.3 °C | 101.09 mm |
| Annual | 8.9 °C | 22.5 °C | 545.58 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| 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 |