Banks, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 35.4 °F (low) to 62.8 °F (high). Annual precipitation averages 23.7 Inches. Banks is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.2 °F | 37.0 °F | 3.47 in. |
| February | 23.2 °F | 43.9 °F | 2.42 in. |
| March | 29.0 °F | 52.9 °F | 2.61 in. |
| April | 33.6 °F | 60.9 °F | 2.16 in. |
| May | 40.8 °F | 70.5 °F | 2.25 in. |
| June | 46.9 °F | 79.2 °F | 1.35 in. |
| July | 53.6 °F | 90.6 °F | 0.42 in. |
| August | 51.9 °F | 89.6 °F | 0.34 in. |
| September | 44.0 °F | 79.5 °F | 0.67 in. |
| October | 34.3 °F | 64.5 °F | 1.59 in. |
| November | 26.9 °F | 47.5 °F | 2.56 in. |
| December | 20.8 °F | 37.2 °F | 3.81 in. |
| Annual | 35.4 °F | 62.8 °F | 23.65 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |