Gunnison, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 18.5 °C (high). Annual precipitation averages 234.2 Millimeters. Gunnison 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 | -9.6 °C | 4 °C | 21.08 mm |
| February | -6.6 °C | 7.1 °C | 16.26 mm |
| March | -3.1 °C | 12.9 °C | 23.37 mm |
| April | -0.6 °C | 17.1 °C | 28.19 mm |
| May | 3.7 °C | 22.7 °C | 25.15 mm |
| June | 8 °C | 29.4 °C | 13.21 mm |
| July | 12.3 °C | 33.5 °C | 11.18 mm |
| August | 11.6 °C | 32.3 °C | 13.21 mm |
| September | 6.2 °C | 27.4 °C | 20.07 mm |
| October | 0.1 °C | 19.7 °C | 24.13 mm |
| November | -5.3 °C | 11.2 °C | 18.03 mm |
| December | -9.5 °C | 4.1 °C | 20.32 mm |
| Annual | 0.6 °C | 18.5 °C | 234.2 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |