Good Hope, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.7 °C (low) to 26.4 °C (high). Annual precipitation averages 283.5 Millimeters. Good Hope 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 | 4.6 °C | 18.9 °C | 66.8 mm |
| February | 4.7 °C | 19.1 °C | 79.25 mm |
| March | 6.3 °C | 21.2 °C | 36.07 mm |
| April | 7.8 °C | 23.8 °C | 18.29 mm |
| May | 10.8 °C | 27.1 °C | 6.6 mm |
| June | 12.9 °C | 31.3 °C | 1.27 mm |
| July | 16.2 °C | 35.2 °C | 1.02 mm |
| August | 16.6 °C | 35.9 °C | 2.03 mm |
| September | 14.8 °C | 33.6 °C | 3.81 mm |
| October | 10.9 °C | 28.2 °C | 9.14 mm |
| November | 6.8 °C | 23.2 °C | 18.03 mm |
| December | 3.8 °C | 18.7 °C | 41.15 mm |
| Annual | 9.7 °C | 26.4 °C | 283.46 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 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |