Rocky Ford, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.7 °C (low) to 21.1 °C (high). Annual precipitation averages 312.9 Millimeters. Rocky Ford is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.6 °C | 8.6 °C | 7.62 mm |
| February | -7.6 °C | 10.4 °C | 8.89 mm |
| March | -3.1 °C | 16.3 °C | 18.03 mm |
| April | 1.7 °C | 20.3 °C | 33.53 mm |
| May | 7.6 °C | 25.5 °C | 40.64 mm |
| June | 13.5 °C | 31.7 °C | 38.86 mm |
| July | 16.2 °C | 34.1 °C | 54.36 mm |
| August | 15.2 °C | 32.8 °C | 49.28 mm |
| September | 9.9 °C | 29.1 °C | 18.03 mm |
| October | 2.1 °C | 21.9 °C | 23.88 mm |
| November | -4.5 °C | 14.4 °C | 11.18 mm |
| December | -9.3 °C | 8.6 °C | 8.64 mm |
| Annual | 2.7 °C | 21.1 °C | 312.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | BSk - Cold Semi-Arid Climate |