Gildford, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 29.5 °F (low) to 56.4 °F (high). Annual precipitation averages 11.1 Inches. Gildford is located in USDA Plant Hardiness Zone 3b. 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 | 6.4 °F | 29.0 °F | 0.36 in. |
| February | 9.3 °F | 33.0 °F | 0.26 in. |
| March | 18.8 °F | 43.5 °F | 0.33 in. |
| April | 29.6 °F | 56.6 °F | 0.94 in. |
| May | 39.2 °F | 66.7 °F | 1.69 in. |
| June | 47.6 °F | 74.7 °F | 2.56 in. |
| July | 52.6 °F | 84.8 °F | 1.2 in. |
| August | 51.0 °F | 84.1 °F | 1.07 in. |
| September | 41.7 °F | 72.3 °F | 1.14 in. |
| October | 30.0 °F | 57.7 °F | 0.77 in. |
| November | 18.8 °F | 42.2 °F | 0.49 in. |
| December | 9.3 °F | 31.8 °F | 0.3 in. |
| Annual | 29.5 °F | 56.4 °F | 11.11 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |