Conejos, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -3 °C (low) to 14.7 °C (high). Annual precipitation averages 231.9 Millimeters. Conejos is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.2 °C | 1.7 °C | 7.62 mm |
| February | -11.8 °C | 4.3 °C | 7.11 mm |
| March | -7.2 °C | 10 °C | 13.72 mm |
| April | -3.5 °C | 14.2 °C | 16 mm |
| May | 1.3 °C | 19.2 °C | 19.81 mm |
| June | 5.4 °C | 24.9 °C | 11.68 mm |
| July | 8.7 °C | 26.6 °C | 36.32 mm |
| August | 7.8 °C | 25.3 °C | 43.18 mm |
| September | 3.8 °C | 22.3 °C | 30.99 mm |
| October | -2.4 °C | 16.3 °C | 20.83 mm |
| November | -8.7 °C | 8.9 °C | 13.72 mm |
| December | -14.3 °C | 2.2 °C | 10.92 mm |
| Annual | -3 °C | 14.7 °C | 231.9 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |