Delano, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 49.5 °F (low) to 77 °F (high). Annual precipitation averages 7.4 Inches. Delano 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 | 37.1 °F | 56.8 °F | 1.43 in. |
| February | 39.8 °F | 62.7 °F | 1.4 in. |
| March | 43.5 °F | 68.8 °F | 1.25 in. |
| April | 46.8 °F | 74.5 °F | 0.59 in. |
| May | 53.4 °F | 83.1 °F | 0.33 in. |
| June | 59.5 °F | 91.5 °F | 0.08 in. |
| July | 65.1 °F | 96.7 °F | 0.0 in. |
| August | 63.5 °F | 96.0 °F | 0.0 in. |
| September | 58.9 °F | 90.9 °F | 0.04 in. |
| October | 50.3 °F | 80.0 °F | 0.4 in. |
| November | 41.0 °F | 66.5 °F | 0.67 in. |
| December | 35.1 °F | 56.8 °F | 1.23 in. |
| Annual | 49.5 °F | 77 °F | 7.42 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 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |