Topaz, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.1 °C (low) to 19.6 °C (high). Annual precipitation averages 234.2 Millimeters. Topaz is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 8.4 °C | 37.85 mm |
| February | -5.3 °C | 10.3 °C | 32.77 mm |
| March | -2.6 °C | 13.8 °C | 30.73 mm |
| April | -0.5 °C | 17.4 °C | 13.72 mm |
| May | 3.6 °C | 22.1 °C | 21.08 mm |
| June | 7.1 °C | 27.9 °C | 12.45 mm |
| July | 11.1 °C | 32.5 °C | 9.4 mm |
| August | 10.2 °C | 31.9 °C | 7.37 mm |
| September | 6.2 °C | 27.8 °C | 5.08 mm |
| October | 0.8 °C | 21 °C | 13.97 mm |
| November | -4.3 °C | 13.4 °C | 20.07 mm |
| December | -6.7 °C | 8.2 °C | 29.72 mm |
| Annual | 1.1 °C | 19.6 °C | 234.21 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |