Pony, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 55.1 °F (high). Annual precipitation averages 17.6 Inches. Pony is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.2 °F | 34.4 °F | 0.55 in. |
| February | 15.1 °F | 37.3 °F | 0.67 in. |
| March | 22.0 °F | 45.0 °F | 1.27 in. |
| April | 28.1 °F | 52.1 °F | 2.31 in. |
| May | 36.3 °F | 61.1 °F | 2.74 in. |
| June | 42.6 °F | 69.5 °F | 3.0 in. |
| July | 48.5 °F | 80.4 °F | 1.38 in. |
| August | 47.1 °F | 79.6 °F | 1.26 in. |
| September | 40.3 °F | 69.8 °F | 1.28 in. |
| October | 31.0 °F | 55.9 °F | 1.55 in. |
| November | 20.9 °F | 42.5 °F | 0.94 in. |
| December | 13.5 °F | 34.1 °F | 0.62 in. |
| Annual | 30 °F | 55.1 °F | 17.57 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Dfb - Humid Continental Mild Summer, Wet All Year |