Cascade, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 27.8 °F (low) to 55.9 °F (high). Annual precipitation averages 23.9 Inches. Cascade is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.0 °F | 32.1 °F | 2.98 in. |
| February | 14.2 °F | 37.4 °F | 2.29 in. |
| March | 20.5 °F | 44.8 °F | 2.72 in. |
| April | 26.7 °F | 52.8 °F | 2.06 in. |
| May | 34.0 °F | 62.8 °F | 2.16 in. |
| June | 39.6 °F | 71.1 °F | 1.68 in. |
| July | 45.2 °F | 82.8 °F | 0.47 in. |
| August | 43.3 °F | 82.5 °F | 0.46 in. |
| September | 35.8 °F | 72.9 °F | 0.84 in. |
| October | 27.9 °F | 58.1 °F | 1.8 in. |
| November | 20.9 °F | 41.6 °F | 2.79 in. |
| December | 13.1 °F | 31.5 °F | 3.6 in. |
| Annual | 27.8 °F | 55.9 °F | 23.85 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |