Mendota, California has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 48.5 °F (low) to 75.6 °F (high). Annual precipitation averages 8.8 Inches. Mendota is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.6 °F | 55.5 °F | 1.81 in. |
| February | 39.9 °F | 61.6 °F | 1.66 in. |
| March | 42.6 °F | 67.5 °F | 1.52 in. |
| April | 45.9 °F | 73.4 °F | 0.7 in. |
| May | 51.8 °F | 82.0 °F | 0.42 in. |
| June | 57.0 °F | 89.7 °F | 0.06 in. |
| July | 61.8 °F | 94.1 °F | 0.0 in. |
| August | 60.9 °F | 93.2 °F | 0.0 in. |
| September | 57.2 °F | 89.2 °F | 0.06 in. |
| October | 49.7 °F | 79.1 °F | 0.42 in. |
| November | 41.1 °F | 65.7 °F | 0.69 in. |
| December | 35.9 °F | 56.0 °F | 1.44 in. |
| Annual | 48.5 °F | 75.6 °F | 8.78 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |