Idledale, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.2 °C (low) to 16.3 °C (high). Annual precipitation averages 538.2 Millimeters. Idledale is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | 6.9 °C | 21.08 mm |
| February | -8.7 °C | 6.9 °C | 27.18 mm |
| March | -4.7 °C | 10.9 °C | 53.85 mm |
| April | -1.4 °C | 13.8 °C | 74.42 mm |
| May | 3.3 °C | 18.6 °C | 74.42 mm |
| June | 8 °C | 25.2 °C | 45.72 mm |
| July | 11.5 °C | 28.6 °C | 53.85 mm |
| August | 10.6 °C | 27.3 °C | 56.13 mm |
| September | 6.1 °C | 23.3 °C | 45.47 mm |
| October | 0.1 °C | 16.6 °C | 36.83 mm |
| November | -5 °C | 10.7 °C | 26.92 mm |
| December | -9.1 °C | 6.7 °C | 22.35 mm |
| Annual | 0.2 °C | 16.3 °C | 538.22 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |