San Leandro, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 50.2 °F (low) to 67.3 °F (high). Annual precipitation averages 20.6 Inches. San Leandro is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.4 °F | 58.0 °F | 3.91 in. |
| February | 45.1 °F | 60.8 °F | 3.87 in. |
| March | 46.7 °F | 63.4 °F | 3.04 in. |
| April | 48.2 °F | 65.4 °F | 1.45 in. |
| May | 51.5 °F | 68.1 °F | 0.73 in. |
| June | 54.0 °F | 72.1 °F | 0.18 in. |
| July | 56.4 °F | 73.6 °F | 0.01 in. |
| August | 57.0 °F | 74.2 °F | 0.03 in. |
| September | 56.4 °F | 75.9 °F | 0.11 in. |
| October | 53.3 °F | 72.8 °F | 0.88 in. |
| November | 47.2 °F | 64.5 °F | 2.13 in. |
| December | 43.1 °F | 58.3 °F | 4.25 in. |
| Annual | 50.2 °F | 67.3 °F | 20.59 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |