Shafter, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.8 °C (low) to 25.2 °C (high). Annual precipitation averages 177.3 Millimeters. Shafter is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.9 °C | 14.1 °C | 35.05 mm |
| February | 4.4 °C | 17.5 °C | 32.77 mm |
| March | 6.6 °C | 20.7 °C | 32.51 mm |
| April | 8.3 °C | 23.8 °C | 14.48 mm |
| May | 11.9 °C | 28.4 °C | 7.11 mm |
| June | 15.3 °C | 32.8 °C | 1.52 mm |
| July | 18.4 °C | 35.8 °C | 0.25 mm |
| August | 17.6 °C | 35.5 °C | 0 mm |
| September | 14.9 °C | 32.8 °C | 1.02 mm |
| October | 10.1 °C | 26.9 °C | 7.37 mm |
| November | 4.9 °C | 19.3 °C | 14.99 mm |
| December | 1.9 °C | 14.2 °C | 30.23 mm |
| Annual | 9.8 °C | 25.2 °C | 177.3 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 20-30 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 | BSk - Cold Semi-Arid Climate |