Forest Hill Village, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 13.2 °C (high). Annual precipitation averages 413.8 Millimeters. Forest Hill Village 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.4 °C | 0.1 °C | 32.51 mm |
| February | -7 °C | 2.3 °C | 23.37 mm |
| March | -3.7 °C | 7.3 °C | 27.43 mm |
| April | -0.2 °C | 12.9 °C | 34.8 mm |
| May | 4.1 °C | 18.5 °C | 45.47 mm |
| June | 7.6 °C | 21.9 °C | 66.04 mm |
| July | 9.9 °C | 28.1 °C | 29.21 mm |
| August | 9 °C | 27.9 °C | 22.86 mm |
| September | 5.1 °C | 21.8 °C | 30.48 mm |
| October | 0.2 °C | 13 °C | 35.56 mm |
| November | -3.4 °C | 4.8 °C | 33.53 mm |
| December | -6.8 °C | 0 °C | 32.51 mm |
| Annual | 0.6 °C | 13.2 °C | 413.77 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |