San Jose, Arizona has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 9.2 °C (low) to 27.4 °C (high). Annual precipitation averages 219.7 Millimeters. San Jose is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 16.4 °C | 19.05 mm |
| February | 1.2 °C | 19.1 °C | 19.05 mm |
| March | 4 °C | 23.1 °C | 12.95 mm |
| April | 7 °C | 27.6 °C | 6.35 mm |
| May | 11.8 °C | 32.5 °C | 3.56 mm |
| June | 17.1 °C | 37.4 °C | 5.84 mm |
| July | 21.1 °C | 37.2 °C | 38.61 mm |
| August | 20.3 °C | 35.9 °C | 36.83 mm |
| September | 16.7 °C | 33.7 °C | 24.89 mm |
| October | 9.4 °C | 28.8 °C | 16.76 mm |
| November | 3.2 °C | 21.8 °C | 13.46 mm |
| December | -0.6 °C | 15.8 °C | 22.35 mm |
| Annual | 9.2 °C | 27.4 °C | 219.7 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |