Delano, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.7 °C (low) to 25 °C (high). Annual precipitation averages 188.5 Millimeters. 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 | 2.8 °C | 13.8 °C | 36.32 mm |
| February | 4.3 °C | 17.1 °C | 35.56 mm |
| March | 6.4 °C | 20.4 °C | 31.75 mm |
| April | 8.2 °C | 23.6 °C | 14.99 mm |
| May | 11.9 °C | 28.4 °C | 8.38 mm |
| June | 15.3 °C | 33.1 °C | 2.03 mm |
| July | 18.4 °C | 35.9 °C | 0 mm |
| August | 17.5 °C | 35.6 °C | 0 mm |
| September | 14.9 °C | 32.7 °C | 1.02 mm |
| October | 10.2 °C | 26.7 °C | 10.16 mm |
| November | 5 °C | 19.2 °C | 17.02 mm |
| December | 1.7 °C | 13.8 °C | 31.24 mm |
| Annual | 9.7 °C | 25 °C | 188.47 mm |
| 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 : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |