Naco, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.4 °C (low) to 25.3 °C (high). Annual precipitation averages 326.4 Millimeters. Naco 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 16.1 °C | 19.05 mm |
| February | 1.2 °C | 17.8 °C | 19.3 mm |
| March | 3.6 °C | 21.1 °C | 13.46 mm |
| April | 6.3 °C | 25.4 °C | 6.6 mm |
| May | 10.6 °C | 29.7 °C | 6.6 mm |
| June | 16 °C | 34.4 °C | 10.67 mm |
| July | 18.4 °C | 33.4 °C | 88.65 mm |
| August | 17.7 °C | 32.1 °C | 68.83 mm |
| September | 14.8 °C | 30.7 °C | 29.46 mm |
| October | 9 °C | 26.8 °C | 21.34 mm |
| November | 3.4 °C | 20.8 °C | 18.03 mm |
| December | -0.2 °C | 15.8 °C | 24.38 mm |
| Annual | 8.4 °C | 25.3 °C | 326.37 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |