San Rafael, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.4 °C (low) to 19.7 °C (high). Annual precipitation averages 261.6 Millimeters. San Rafael 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.5 °C | 7.9 °C | 11.94 mm |
| February | -6.4 °C | 10.4 °C | 12.7 mm |
| March | -3.8 °C | 14.5 °C | 11.18 mm |
| April | -0.3 °C | 19.2 °C | 15.49 mm |
| May | 4.4 °C | 24.2 °C | 15.24 mm |
| June | 9.3 °C | 30.3 °C | 16.51 mm |
| July | 13.3 °C | 31.2 °C | 44.96 mm |
| August | 12.3 °C | 29.7 °C | 48.26 mm |
| September | 8.1 °C | 26.6 °C | 33.78 mm |
| October | 1.2 °C | 20.9 °C | 23.11 mm |
| November | -4.4 °C | 13.4 °C | 12.45 mm |
| December | -8.4 °C | 8.2 °C | 16 mm |
| Annual | 1.4 °C | 19.7 °C | 261.62 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 |