Wye, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.2 °F (low) to 57.6 °F (high). Annual precipitation averages 15 Inches. Wye is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.4 °F | 33.7 °F | 1.0 in. |
| February | 20.2 °F | 38.3 °F | 1.03 in. |
| March | 25.9 °F | 48.3 °F | 0.93 in. |
| April | 31.8 °F | 56.5 °F | 1.45 in. |
| May | 38.9 °F | 66.3 °F | 1.9 in. |
| June | 45.5 °F | 73.2 °F | 2.34 in. |
| July | 50.5 °F | 85.1 °F | 0.9 in. |
| August | 49.1 °F | 84.5 °F | 0.94 in. |
| September | 41.7 °F | 73.2 °F | 1.04 in. |
| October | 32.7 °F | 57.2 °F | 1.18 in. |
| November | 24.8 °F | 41.5 °F | 1.25 in. |
| December | 18.5 °F | 32.8 °F | 1.04 in. |
| Annual | 33.2 °F | 57.6 °F | 15 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |