Franklin, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 7.4 °C (low) to 26.6 °C (high). Annual precipitation averages 268.5 Millimeters. Franklin is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 15.7 °C | 21.84 mm |
| February | -0.5 °C | 18.2 °C | 21.34 mm |
| March | 2.1 °C | 22.1 °C | 13.97 mm |
| April | 5.2 °C | 26.7 °C | 4.32 mm |
| May | 9.8 °C | 31.5 °C | 7.11 mm |
| June | 15.2 °C | 36.7 °C | 7.11 mm |
| July | 19.3 °C | 36.6 °C | 45.97 mm |
| August | 18.8 °C | 35.2 °C | 51.82 mm |
| September | 14.9 °C | 32.8 °C | 32.26 mm |
| October | 7.7 °C | 27.9 °C | 18.29 mm |
| November | 1.3 °C | 20.8 °C | 16.51 mm |
| December | -2.2 °C | 15.3 °C | 27.94 mm |
| Annual | 7.4 °C | 26.6 °C | 268.48 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |