Athol, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 34 °F (low) to 56.7 °F (high). Annual precipitation averages 28.5 Inches. Athol is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 34.7 °F | 3.83 in. |
| February | 22.4 °F | 38.7 °F | 2.22 in. |
| March | 26.6 °F | 47.1 °F | 2.95 in. |
| April | 31.7 °F | 55.3 °F | 2.24 in. |
| May | 38.9 °F | 65.3 °F | 2.3 in. |
| June | 44.8 °F | 71.2 °F | 2.04 in. |
| July | 49.2 °F | 81.9 °F | 0.74 in. |
| August | 48.2 °F | 82.4 °F | 0.96 in. |
| September | 41.1 °F | 71.9 °F | 1.03 in. |
| October | 33.2 °F | 56.4 °F | 2.47 in. |
| November | 27.5 °F | 42.2 °F | 3.61 in. |
| December | 22.3 °F | 33.7 °F | 4.09 in. |
| Annual | 34 °F | 56.7 °F | 28.48 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |