Platteville, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.2 °C (low) to 17.9 °C (high). Annual precipitation averages 344.9 Millimeters. Platteville is located in USDA Plant Hardiness Zone 5b. 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 | -10.2 °C | 5.4 °C | 8.13 mm |
| February | -8.7 °C | 6.8 °C | 10.41 mm |
| March | -3.8 °C | 13 °C | 24.89 mm |
| April | 0.2 °C | 16.7 °C | 43.94 mm |
| May | 5.9 °C | 21.6 °C | 61.21 mm |
| June | 11.2 °C | 28.3 °C | 39.12 mm |
| July | 14.1 °C | 31.6 °C | 36.83 mm |
| August | 12.7 °C | 30.4 °C | 36.58 mm |
| September | 7.8 °C | 26.2 °C | 32.51 mm |
| October | 0.8 °C | 18.4 °C | 25.91 mm |
| November | -5.2 °C | 11.1 °C | 14.73 mm |
| December | -10.2 °C | 5.3 °C | 10.67 mm |
| Annual | 1.2 °C | 17.9 °C | 344.93 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |