Ramah, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.2 °C (low) to 16.9 °C (high). Annual precipitation averages 440.4 Millimeters. Ramah 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 | -10.3 °C | 6 °C | 7.11 mm |
| February | -9.2 °C | 6.7 °C | 11.68 mm |
| March | -5.2 °C | 11.6 °C | 26.42 mm |
| April | -1.4 °C | 15.1 °C | 46.48 mm |
| May | 4 °C | 20.2 °C | 64.52 mm |
| June | 9.2 °C | 26.6 °C | 59.94 mm |
| July | 12.6 °C | 29.7 °C | 64.26 mm |
| August | 11.7 °C | 28.2 °C | 78.23 mm |
| September | 6.8 °C | 24.4 °C | 25.91 mm |
| October | 0.1 °C | 17.5 °C | 30.23 mm |
| November | -5.8 °C | 10.8 °C | 14.48 mm |
| December | -10.2 °C | 5.8 °C | 11.18 mm |
| Annual | 0.2 °C | 16.9 °C | 440.44 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |