Meridian, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.2 °C (low) to 17.9 °C (high). Annual precipitation averages 465.3 Millimeters. Meridian is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 7.4 °C | 16.51 mm |
| February | -7.1 °C | 7.9 °C | 18.54 mm |
| March | -2.9 °C | 12.6 °C | 41.66 mm |
| April | 0.4 °C | 15.8 °C | 60.96 mm |
| May | 5.6 °C | 20.7 °C | 60.45 mm |
| June | 10.9 °C | 27.4 °C | 52.07 mm |
| July | 14.4 °C | 30.8 °C | 52.32 mm |
| August | 13.4 °C | 29.5 °C | 57.15 mm |
| September | 8.8 °C | 25.6 °C | 36.83 mm |
| October | 2.1 °C | 18.4 °C | 30.48 mm |
| November | -3.3 °C | 12.1 °C | 22.1 mm |
| December | -7.7 °C | 7.1 °C | 16.26 mm |
| Annual | 2.2 °C | 17.9 °C | 465.33 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |