McCall, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 26.8 °F (low) to 53.9 °F (high). Annual precipitation averages 25.8 Inches. McCall is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.4 °F | 31.5 °F | 3.11 in. |
| February | 13.0 °F | 36.0 °F | 2.52 in. |
| March | 19.0 °F | 42.6 °F | 2.8 in. |
| April | 25.8 °F | 49.6 °F | 2.26 in. |
| May | 33.2 °F | 60.3 °F | 2.39 in. |
| June | 38.7 °F | 68.5 °F | 2.14 in. |
| July | 44.0 °F | 80.8 °F | 0.59 in. |
| August | 42.3 °F | 80.5 °F | 0.55 in. |
| September | 34.8 °F | 70.5 °F | 1.08 in. |
| October | 27.2 °F | 55.6 °F | 1.84 in. |
| November | 19.8 °F | 40.5 °F | 2.79 in. |
| December | 11.9 °F | 30.7 °F | 3.7 in. |
| Annual | 26.8 °F | 53.9 °F | 25.77 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |