Fernan Lake Village, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 2.7 °C (low) to 14.6 °C (high). Annual precipitation averages 684.5 Millimeters. Fernan Lake Village is located in USDA Plant Hardiness Zone 7a. 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 | 2.2 °C | 91.19 mm |
| February | -3.8 °C | 4.6 °C | 58.93 mm |
| March | -1.6 °C | 9.2 °C | 67.56 mm |
| April | 1.4 °C | 13.8 °C | 54.1 mm |
| May | 5.4 °C | 19.3 °C | 56.64 mm |
| June | 8.7 °C | 22.5 °C | 50.55 mm |
| July | 11.5 °C | 28.4 °C | 18.29 mm |
| August | 11.2 °C | 28.8 °C | 20.07 mm |
| September | 6.9 °C | 23.3 °C | 24.13 mm |
| October | 2.3 °C | 14.7 °C | 58.67 mm |
| November | -1.2 °C | 6.6 °C | 87.88 mm |
| December | -4.1 °C | 1.9 °C | 96.52 mm |
| Annual | 2.7 °C | 14.6 °C | 684.53 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |