Genoa, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1 °C (low) to 17 °C (high). Annual precipitation averages 416.6 Millimeters. Genoa is located in USDA Plant Hardiness Zone 5b. 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 | -9.4 °C | 5.8 °C | 6.86 mm |
| February | -8.4 °C | 6.4 °C | 10.16 mm |
| March | -4.3 °C | 11.8 °C | 16.76 mm |
| April | -0.9 °C | 15.3 °C | 35.31 mm |
| May | 4.8 °C | 20.6 °C | 61.72 mm |
| June | 10.5 °C | 27.1 °C | 66.04 mm |
| July | 13.6 °C | 30.2 °C | 78.23 mm |
| August | 12.7 °C | 28.8 °C | 77.22 mm |
| September | 7.8 °C | 24.8 °C | 25.15 mm |
| October | 0.4 °C | 17.5 °C | 23.62 mm |
| November | -5.7 °C | 10.7 °C | 9.65 mm |
| December | -9.7 °C | 5.4 °C | 5.84 mm |
| Annual | 1 °C | 17 °C | 416.56 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |