Thoreau, New Mexico has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 18.2 °C (high). Annual precipitation averages 269.8 Millimeters. Thoreau is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.9 °C | 6.7 °C | 14.48 mm |
| February | -5.9 °C | 8.9 °C | 13.46 mm |
| March | -4.2 °C | 12.9 °C | 15.75 mm |
| April | -0.2 °C | 17.4 °C | 12.95 mm |
| May | 4.6 °C | 22.3 °C | 16.26 mm |
| June | 9.4 °C | 28.7 °C | 12.45 mm |
| July | 12.9 °C | 29.8 °C | 40.64 mm |
| August | 12.1 °C | 28.3 °C | 61.47 mm |
| September | 8.1 °C | 25.3 °C | 29.97 mm |
| October | 1.7 °C | 19.2 °C | 20.57 mm |
| November | -3.9 °C | 12.1 °C | 13.97 mm |
| December | -7.7 °C | 7.1 °C | 17.78 mm |
| Annual | 1.6 °C | 18.2 °C | 269.75 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 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 | Dfb - Humid Continental Mild Summer, Wet All Year |