San Jose, Arizona has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 48.6 °F (low) to 81.4 °F (high). Annual precipitation averages 8.7 Inches. 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 | 30.8 °F | 61.6 °F | 0.75 in. |
| February | 34.2 °F | 66.3 °F | 0.75 in. |
| March | 39.2 °F | 73.5 °F | 0.51 in. |
| April | 44.6 °F | 81.6 °F | 0.25 in. |
| May | 53.3 °F | 90.5 °F | 0.14 in. |
| June | 62.7 °F | 99.3 °F | 0.23 in. |
| July | 70.0 °F | 99.0 °F | 1.52 in. |
| August | 68.6 °F | 96.7 °F | 1.45 in. |
| September | 62.0 °F | 92.6 °F | 0.98 in. |
| October | 49.0 °F | 83.9 °F | 0.66 in. |
| November | 37.7 °F | 71.2 °F | 0.53 in. |
| December | 30.9 °F | 60.5 °F | 0.88 in. |
| Annual | 48.6 °F | 81.4 °F | 8.65 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |