Bonners Ferry, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 36.2 °F (low) to 57.5 °F (high). Annual precipitation averages 21.2 Inches. Bonners Ferry 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 | 23.0 °F | 33.9 °F | 2.83 in. |
| February | 23.6 °F | 38.3 °F | 1.7 in. |
| March | 28.8 °F | 47.9 °F | 2.15 in. |
| April | 34.4 °F | 58.0 °F | 1.42 in. |
| May | 41.7 °F | 67.9 °F | 1.82 in. |
| June | 48.0 °F | 73.4 °F | 1.8 in. |
| July | 52.4 °F | 83.1 °F | 0.62 in. |
| August | 50.9 °F | 83.7 °F | 0.59 in. |
| September | 43.9 °F | 72.6 °F | 0.96 in. |
| October | 35.3 °F | 55.8 °F | 1.95 in. |
| November | 29.1 °F | 41.7 °F | 2.27 in. |
| December | 23.6 °F | 33.5 °F | 3.05 in. |
| Annual | 36.2 °F | 57.5 °F | 21.16 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |