Finley Point, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 13.7 °C (high). Annual precipitation averages 433.8 Millimeters. Finley Point is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.5 °C | 0.8 °C | 33.02 mm |
| February | -6.1 °C | 2.7 °C | 25.65 mm |
| March | -3 °C | 7.9 °C | 29.72 mm |
| April | 0.4 °C | 13.3 °C | 40.89 mm |
| May | 4.5 °C | 18.6 °C | 49.53 mm |
| June | 8.1 °C | 22.2 °C | 65.53 mm |
| July | 10.7 °C | 28.4 °C | 24.89 mm |
| August | 9.9 °C | 28.3 °C | 19.56 mm |
| September | 5.9 °C | 22.1 °C | 32 mm |
| October | 1 °C | 13.5 °C | 42.42 mm |
| November | -2.8 °C | 5.4 °C | 34.54 mm |
| December | -6.1 °C | 0.8 °C | 36.07 mm |
| Annual | 1.3 °C | 13.7 °C | 433.82 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |