Redstone, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.7 °C (low) to 14.4 °C (high). Annual precipitation averages 567.7 Millimeters. Redstone is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.9 °C | 1.2 °C | 51.05 mm |
| February | -11.3 °C | 3.6 °C | 54.36 mm |
| March | -6.8 °C | 8.7 °C | 51.05 mm |
| April | -3 °C | 13.1 °C | 46.74 mm |
| May | 1 °C | 18.4 °C | 46.99 mm |
| June | 4.9 °C | 24.8 °C | 28.7 mm |
| July | 8.5 °C | 28.2 °C | 49.53 mm |
| August | 7.6 °C | 26.8 °C | 26.92 mm |
| September | 3.6 °C | 22.7 °C | 56.9 mm |
| October | -2.1 °C | 15.8 °C | 51.31 mm |
| November | -7.8 °C | 7.8 °C | 58.42 mm |
| December | -13.2 °C | 1.1 °C | 45.72 mm |
| Annual | -2.7 °C | 14.4 °C | 567.69 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Exceptional Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |