Idalia, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 36.8 °F (low) to 64.8 °F (high). Annual precipitation averages 19.2 Inches. Idalia 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 | 16.5 °F | 42.6 °F | 0.44 in. |
| February | 18.2 °F | 44.6 °F | 0.48 in. |
| March | 26.0 °F | 54.9 °F | 0.98 in. |
| April | 33.7 °F | 62.3 °F | 1.82 in. |
| May | 44.5 °F | 71.6 °F | 2.87 in. |
| June | 55.0 °F | 83.9 °F | 3.03 in. |
| July | 60.6 °F | 89.3 °F | 3.0 in. |
| August | 58.6 °F | 87.0 °F | 2.91 in. |
| September | 49.5 °F | 79.4 °F | 1.38 in. |
| October | 36.2 °F | 65.8 °F | 1.32 in. |
| November | 25.3 °F | 52.9 °F | 0.54 in. |
| December | 17.3 °F | 43.1 °F | 0.45 in. |
| Annual | 36.8 °F | 64.8 °F | 19.22 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |