Kooskia, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 3.7 °C (low) to 17.3 °C (high). Annual precipitation averages 611.9 Millimeters. Kooskia is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 3.8 °C | 47.24 mm |
| February | -2 °C | 7.4 °C | 37.08 mm |
| March | -0.1 °C | 12.3 °C | 69.85 mm |
| April | 2.6 °C | 16.9 °C | 72.39 mm |
| May | 6.3 °C | 21.9 °C | 76.96 mm |
| June | 9.4 °C | 25.7 °C | 64.26 mm |
| July | 12 °C | 32.1 °C | 22.86 mm |
| August | 11.4 °C | 32.5 °C | 20.57 mm |
| September | 7.8 °C | 26.4 °C | 28.45 mm |
| October | 3.2 °C | 17.1 °C | 53.85 mm |
| November | -0.3 °C | 8.1 °C | 66.04 mm |
| December | -3 °C | 3.3 °C | 52.32 mm |
| Annual | 3.7 °C | 17.3 °C | 611.87 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |