Hanover, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.7 °C (low) to 20.8 °C (high). Annual precipitation averages 540.3 Millimeters. Hanover is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5 °C | 11.1 °C | 32.51 mm |
| February | -3.7 °C | 12.9 °C | 30.99 mm |
| March | -1.2 °C | 16.3 °C | 26.42 mm |
| April | 1.7 °C | 20.3 °C | 11.68 mm |
| May | 6.1 °C | 24.9 °C | 16.51 mm |
| June | 11 °C | 30.3 °C | 26.67 mm |
| July | 14.2 °C | 30.2 °C | 101.09 mm |
| August | 13.6 °C | 28.7 °C | 109.47 mm |
| September | 10.1 °C | 26.1 °C | 76.2 mm |
| October | 4.1 °C | 21.7 °C | 34.04 mm |
| November | -1.4 °C | 15.8 °C | 33.02 mm |
| December | -4.6 °C | 11.1 °C | 41.66 mm |
| Annual | 3.7 °C | 20.8 °C | 540.26 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |