Guffey, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -3.5 °C (low) to 12.8 °C (high). Annual precipitation averages 378.2 Millimeters. Guffey is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.3 °C | 2.1 °C | 11.43 mm |
| February | -12.9 °C | 3.1 °C | 14.22 mm |
| March | -8.4 °C | 7.2 °C | 25.4 mm |
| April | -4.9 °C | 10.9 °C | 36.83 mm |
| May | -0.3 °C | 16.1 °C | 40.89 mm |
| June | 4.6 °C | 22.6 °C | 29.46 mm |
| July | 7.5 °C | 24.9 °C | 68.33 mm |
| August | 6.9 °C | 23.4 °C | 71.37 mm |
| September | 2.9 °C | 20.2 °C | 33.53 mm |
| October | -3 °C | 14.3 °C | 21.84 mm |
| November | -8.2 °C | 7.2 °C | 12.95 mm |
| December | -13.1 °C | 2 °C | 11.94 mm |
| Annual | -3.5 °C | 12.8 °C | 378.19 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |