Cascade, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.9 °C (low) to 15.1 °C (high). Annual precipitation averages 399.8 Millimeters. Cascade is located in USDA Plant Hardiness Zone 4a. 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 | -8.3 °C | 3.2 °C | 13.21 mm |
| February | -7.9 °C | 4.4 °C | 13.21 mm |
| March | -4.4 °C | 9 °C | 18.8 mm |
| April | -0.1 °C | 13.9 °C | 49.78 mm |
| May | 4.3 °C | 18.9 °C | 66.55 mm |
| June | 8.4 °C | 23.3 °C | 74.93 mm |
| July | 11.1 °C | 29.6 °C | 28.96 mm |
| August | 10.1 °C | 29.2 °C | 32.51 mm |
| September | 6.3 °C | 23.4 °C | 39.88 mm |
| October | 1.8 °C | 15.6 °C | 30.23 mm |
| November | -3.3 °C | 7.8 °C | 17.02 mm |
| December | -7.7 °C | 3.2 °C | 14.73 mm |
| Annual | 0.9 °C | 15.1 °C | 399.81 mm |
| 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |