Pleasanton, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 48.3 °F (low) to 72 °F (high). Annual precipitation averages 20 Inches. Pleasanton 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 | 39.9 °F | 57.4 °F | 3.72 in. |
| February | 41.8 °F | 61.2 °F | 3.91 in. |
| March | 43.9 °F | 64.9 °F | 3.06 in. |
| April | 46.3 °F | 68.3 °F | 1.45 in. |
| May | 50.5 °F | 73.8 °F | 0.72 in. |
| June | 54.0 °F | 80.9 °F | 0.14 in. |
| July | 56.9 °F | 86.7 °F | 0.0 in. |
| August | 56.9 °F | 86.3 °F | 0.03 in. |
| September | 55.4 °F | 84.3 °F | 0.08 in. |
| October | 50.7 °F | 77.0 °F | 0.99 in. |
| November | 43.9 °F | 65.4 °F | 2.01 in. |
| December | 39.7 °F | 57.6 °F | 3.84 in. |
| Annual | 48.3 °F | 72 °F | 19.95 in. |
| 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 : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |