Milan, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.3 °C (low) to 19.9 °C (high). Annual precipitation averages 255.5 Millimeters. Milan is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 8.1 °C | 11.18 mm |
| February | -6.4 °C | 10.6 °C | 12.7 mm |
| March | -3.8 °C | 14.7 °C | 10.41 mm |
| April | -0.4 °C | 19.3 °C | 15.75 mm |
| May | 4.4 °C | 24.2 °C | 15.24 mm |
| June | 9.2 °C | 30.4 °C | 14.22 mm |
| July | 13.3 °C | 31.3 °C | 43.43 mm |
| August | 12.3 °C | 29.9 °C | 46.48 mm |
| September | 8 °C | 26.8 °C | 34.29 mm |
| October | 1.2 °C | 21.1 °C | 23.62 mm |
| November | -4.6 °C | 13.6 °C | 12.19 mm |
| December | -8.6 °C | 8.3 °C | 16 mm |
| Annual | 1.3 °C | 19.9 °C | 255.51 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |