McCall, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from -2.9 °C (low) to 12.2 °C (high). Annual precipitation averages 654.6 Millimeters. 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 °C | -0.3 °C | 78.99 mm |
| February | -10.6 °C | 2.2 °C | 64.01 mm |
| March | -7.2 °C | 5.9 °C | 71.12 mm |
| April | -3.4 °C | 9.8 °C | 57.4 mm |
| May | 0.7 °C | 15.7 °C | 60.71 mm |
| June | 3.7 °C | 20.3 °C | 54.36 mm |
| July | 6.7 °C | 27.1 °C | 14.99 mm |
| August | 5.7 °C | 26.9 °C | 13.97 mm |
| September | 1.6 °C | 21.4 °C | 27.43 mm |
| October | -2.7 °C | 13.1 °C | 46.74 mm |
| November | -6.8 °C | 4.7 °C | 70.87 mm |
| December | -11.2 °C | -0.7 °C | 93.98 mm |
| Annual | -2.9 °C | 12.2 °C | 654.57 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |