Manassa, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -3.7 °C (low) to 15 °C (high). Annual precipitation averages 195.1 Millimeters. Manassa is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.7 °C | 1.4 °C | 5.33 mm |
| February | -12.8 °C | 4.7 °C | 5.33 mm |
| March | -7.7 °C | 10.6 °C | 10.92 mm |
| April | -3.9 °C | 14.8 °C | 13.21 mm |
| May | 1.1 °C | 19.7 °C | 16.51 mm |
| June | 5.1 °C | 25.3 °C | 9.91 mm |
| July | 8.5 °C | 26.9 °C | 30.73 mm |
| August | 7.4 °C | 25.7 °C | 37.59 mm |
| September | 3.3 °C | 22.8 °C | 27.69 mm |
| October | -3.2 °C | 16.9 °C | 17.78 mm |
| November | -9.7 °C | 9.3 °C | 11.68 mm |
| December | -15.9 °C | 2.1 °C | 8.38 mm |
| Annual | -3.7 °C | 15 °C | 195.06 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| 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 | BSk - Cold Semi-Arid Climate |