Wye, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 14.2 °C (high). Annual precipitation averages 381 Millimeters. 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 | -7.6 °C | 0.9 °C | 25.4 mm |
| February | -6.6 °C | 3.5 °C | 26.16 mm |
| March | -3.4 °C | 9.1 °C | 23.62 mm |
| April | -0.1 °C | 13.6 °C | 36.83 mm |
| May | 3.8 °C | 19.1 °C | 48.26 mm |
| June | 7.5 °C | 22.9 °C | 59.44 mm |
| July | 10.3 °C | 29.5 °C | 22.86 mm |
| August | 9.5 °C | 29.2 °C | 23.88 mm |
| September | 5.4 °C | 22.9 °C | 26.42 mm |
| October | 0.4 °C | 14 °C | 29.97 mm |
| November | -4 °C | 5.3 °C | 31.75 mm |
| December | -7.5 °C | 0.4 °C | 26.42 mm |
| Annual | 0.6 °C | 14.2 °C | 381.01 mm |
| 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 : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |