Jackson, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 22.9 °F (low) to 50.3 °F (high). Annual precipitation averages 11.9 Inches. Jackson is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Aug. 1 - Aug. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.5 °F | 28.2 °F | 0.69 in. |
| February | 7.5 °F | 30.6 °F | 0.54 in. |
| March | 14.7 °F | 38.8 °F | 0.73 in. |
| April | 22.3 °F | 47.3 °F | 1.18 in. |
| May | 29.9 °F | 57.1 °F | 1.5 in. |
| June | 36.5 °F | 65.6 °F | 2.0 in. |
| July | 40.8 °F | 76.8 °F | 0.95 in. |
| August | 38.3 °F | 76.3 °F | 0.76 in. |
| September | 32.2 °F | 66.1 °F | 0.99 in. |
| October | 24.0 °F | 51.8 °F | 1.05 in. |
| November | 14.2 °F | 37.0 °F | 0.81 in. |
| December | 6.4 °F | 27.7 °F | 0.65 in. |
| Annual | 22.9 °F | 50.3 °F | 11.85 in. |
| Average First Frost Date | Aug. 1 - Aug. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |