Monument, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.1 °C (low) to 15.9 °C (high). Annual precipitation averages 519.7 Millimeters. Monument 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.3 °C | 5.7 °C | 17.78 mm |
| February | -8.5 °C | 6 °C | 16.51 mm |
| March | -5.1 °C | 10.5 °C | 37.85 mm |
| April | -1.7 °C | 13.7 °C | 69.6 mm |
| May | 3.3 °C | 18.7 °C | 67.56 mm |
| June | 8.3 °C | 25.3 °C | 49.53 mm |
| July | 11.7 °C | 28.2 °C | 73.15 mm |
| August | 10.9 °C | 26.9 °C | 74.17 mm |
| September | 6.4 °C | 23.3 °C | 40.13 mm |
| October | 0.2 °C | 16.5 °C | 30.99 mm |
| November | -5.4 °C | 10.1 °C | 24.13 mm |
| December | -9.2 °C | 5.6 °C | 18.29 mm |
| Annual | 0.1 °C | 15.9 °C | 519.69 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |