Parkline, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 2.6 °C (low) to 14.9 °C (high). Annual precipitation averages 757.7 Millimeters. Parkline is located in USDA Plant Hardiness Zone 6b. 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 | -3.9 °C | 2.6 °C | 106.93 mm |
| February | -3.7 °C | 4.9 °C | 71.37 mm |
| March | -1.4 °C | 9.6 °C | 77.47 mm |
| April | 1.4 °C | 14.3 °C | 56.39 mm |
| May | 5.3 °C | 19.6 °C | 53.85 mm |
| June | 8.8 °C | 22.9 °C | 54.1 mm |
| July | 11.1 °C | 28.7 °C | 21.08 mm |
| August | 10.6 °C | 28.9 °C | 22.1 mm |
| September | 6.4 °C | 23.4 °C | 25.4 mm |
| October | 1.9 °C | 15 °C | 59.44 mm |
| November | -1.3 °C | 6.8 °C | 104.39 mm |
| December | -4.1 °C | 2.1 °C | 105.16 mm |
| Annual | 2.6 °C | 14.9 °C | 757.68 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |