Woods Bay, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 13 °C (high). Annual precipitation averages 594.1 Millimeters. Woods Bay is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 0.3 °C | 51.31 mm |
| February | -6.6 °C | 2.3 °C | 35.31 mm |
| March | -3.4 °C | 7.2 °C | 39.88 mm |
| April | 0.1 °C | 12.4 °C | 52.83 mm |
| May | 4.2 °C | 18.1 °C | 58.67 mm |
| June | 7.8 °C | 21.5 °C | 95.5 mm |
| July | 10.3 °C | 27.6 °C | 34.8 mm |
| August | 9.4 °C | 27.4 °C | 26.67 mm |
| September | 5.4 °C | 21.3 °C | 44.2 mm |
| October | 0.7 °C | 12.9 °C | 52.58 mm |
| November | -3 °C | 5 °C | 52.58 mm |
| December | -6.3 °C | 0.3 °C | 49.78 mm |
| Annual | 1 °C | 13 °C | 594.11 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |