Pryor, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.1 °F (low) to 59.3 °F (high). Annual precipitation averages 15.7 Inches. Pryor is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.2 °F | 37.0 °F | 0.49 in. |
| February | 14.8 °F | 39.2 °F | 0.55 in. |
| March | 23.6 °F | 49.3 °F | 1.22 in. |
| April | 30.6 °F | 56.6 °F | 1.63 in. |
| May | 39.8 °F | 65.9 °F | 2.91 in. |
| June | 47.4 °F | 75.8 °F | 2.17 in. |
| July | 53.5 °F | 86.2 °F | 1.22 in. |
| August | 50.8 °F | 84.9 °F | 0.9 in. |
| September | 42.6 °F | 74.2 °F | 1.39 in. |
| October | 31.9 °F | 59.5 °F | 1.87 in. |
| November | 21.8 °F | 46.5 °F | 0.78 in. |
| December | 14.4 °F | 36.5 °F | 0.55 in. |
| Annual | 32.1 °F | 59.3 °F | 15.68 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |