San Acacio, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -3 °C (low) to 15 °C (high). Annual precipitation averages 243.6 Millimeters. San Acacio is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.2 °C | 1.6 °C | 9.4 mm |
| February | -11.9 °C | 4.6 °C | 8.38 mm |
| March | -6.9 °C | 10.3 °C | 16.51 mm |
| April | -3.4 °C | 14.3 °C | 19.3 mm |
| May | 1.5 °C | 19.4 °C | 23.37 mm |
| June | 5.9 °C | 25.5 °C | 17.27 mm |
| July | 9.2 °C | 27.3 °C | 38.1 mm |
| August | 8.1 °C | 26.1 °C | 35.56 mm |
| September | 3.9 °C | 22.8 °C | 28.7 mm |
| October | -2.4 °C | 16.7 °C | 20.07 mm |
| November | -9.2 °C | 9.1 °C | 13.72 mm |
| December | -15.1 °C | 2.2 °C | 13.21 mm |
| Annual | -3 °C | 15 °C | 243.59 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |