Terra Bella, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 10.2 °C (low) to 25.3 °C (high). Annual precipitation averages 256.8 Millimeters. Terra Bella is located in USDA Plant Hardiness Zone 9b. 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 | 3.6 °C | 14.3 °C | 52.32 mm |
| February | 4.9 °C | 17.2 °C | 44.96 mm |
| March | 6.8 °C | 20.6 °C | 42.67 mm |
| April | 8.5 °C | 23.7 °C | 24.64 mm |
| May | 12 °C | 28.5 °C | 9.91 mm |
| June | 15.3 °C | 33.3 °C | 2.79 mm |
| July | 18.7 °C | 36.2 °C | 0.76 mm |
| August | 17.9 °C | 35.7 °C | 0.76 mm |
| September | 15.4 °C | 33.1 °C | 2.03 mm |
| October | 10.7 °C | 26.9 °C | 12.19 mm |
| November | 5.8 °C | 19.4 °C | 22.35 mm |
| December | 2.9 °C | 14.2 °C | 41.4 mm |
| Annual | 10.2 °C | 25.3 °C | 256.78 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°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 |