San Miguel, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 11.7 °C (low) to 29.4 °C (high). Annual precipitation averages 337.3 Millimeters. San Miguel is located in USDA Plant Hardiness Zone 9a. 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 | 2.6 °C | 19.5 °C | 24.64 mm |
| February | 4.2 °C | 21.1 °C | 21.59 mm |
| March | 6.6 °C | 24.5 °C | 19.81 mm |
| April | 8.9 °C | 28.4 °C | 6.35 mm |
| May | 13.3 °C | 33.4 °C | 4.57 mm |
| June | 18.7 °C | 38.6 °C | 7.37 mm |
| July | 22.9 °C | 38.7 °C | 73.91 mm |
| August | 22.3 °C | 37.6 °C | 73.15 mm |
| September | 19 °C | 35.8 °C | 38.1 mm |
| October | 12.4 °C | 31 °C | 18.29 mm |
| November | 6.4 °C | 24.6 °C | 14.22 mm |
| December | 2.5 °C | 19.1 °C | 35.31 mm |
| Annual | 11.7 °C | 29.4 °C | 337.31 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |