Coaldale, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.3 °C (low) to 17.8 °C (high). Annual precipitation averages 355.6 Millimeters. Coaldale is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.4 °C | 6.6 °C | 12.7 mm |
| February | -8.3 °C | 7.4 °C | 17.02 mm |
| March | -4.4 °C | 12.3 °C | 31.75 mm |
| April | -1.1 °C | 16.5 °C | 41.15 mm |
| May | 3.9 °C | 21.6 °C | 40.13 mm |
| June | 8.3 °C | 27.7 °C | 20.57 mm |
| July | 11.7 °C | 30 °C | 51.82 mm |
| August | 10.8 °C | 28.8 °C | 58.17 mm |
| September | 6.3 °C | 25.4 °C | 26.92 mm |
| October | 0.1 °C | 19.2 °C | 25.4 mm |
| November | -5.1 °C | 11.7 °C | 14.48 mm |
| December | -9.3 °C | 6.5 °C | 15.49 mm |
| Annual | 0.3 °C | 17.8 °C | 355.6 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |