Buttonwillow, California has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 10 °C (low) to 25.4 °C (high). Annual precipitation averages 151.6 Millimeters. Buttonwillow 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 Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.8 °C | 14 °C | 29.97 mm |
| February | 4.4 °C | 17.6 °C | 29.97 mm |
| March | 6.8 °C | 20.9 °C | 30.48 mm |
| April | 8.6 °C | 24.2 °C | 10.16 mm |
| May | 12.6 °C | 28.9 °C | 6.1 mm |
| June | 15.8 °C | 33.3 °C | 1.02 mm |
| July | 18.9 °C | 36.4 °C | 0 mm |
| August | 18 °C | 35.8 °C | 0 mm |
| September | 15.1 °C | 33.1 °C | 0.76 mm |
| October | 10 °C | 27.2 °C | 6.86 mm |
| November | 5.1 °C | 19.4 °C | 11.94 mm |
| December | 1.9 °C | 14.2 °C | 24.38 mm |
| Annual | 10 °C | 25.4 °C | 151.64 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| 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 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |