Mendota, California has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 9.2 °C (low) to 24.2 °C (high). Annual precipitation averages 223 Millimeters. 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 | 3.1 °C | 13.1 °C | 45.97 mm |
| February | 4.4 °C | 16.4 °C | 42.16 mm |
| March | 5.9 °C | 19.7 °C | 38.61 mm |
| April | 7.7 °C | 23 °C | 17.78 mm |
| May | 11 °C | 27.8 °C | 10.67 mm |
| June | 13.9 °C | 32.1 °C | 1.52 mm |
| July | 16.6 °C | 34.5 °C | 0 mm |
| August | 16.1 °C | 34 °C | 0 mm |
| September | 14 °C | 31.8 °C | 1.52 mm |
| October | 9.8 °C | 26.2 °C | 10.67 mm |
| November | 5.1 °C | 18.7 °C | 17.53 mm |
| December | 2.2 °C | 13.3 °C | 36.58 mm |
| Annual | 9.2 °C | 24.2 °C | 223.01 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |