Wise River, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -4 °C (low) to 11.9 °C (high). Annual precipitation averages 313.7 Millimeters. Wise River is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around July 11 - July 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.6 °C | -0.3 °C | 13.21 mm |
| February | -12.1 °C | 1.3 °C | 13.72 mm |
| March | -8.1 °C | 6 °C | 16 mm |
| April | -4.2 °C | 10.3 °C | 24.38 mm |
| May | -0.2 °C | 15.6 °C | 45.97 mm |
| June | 3.4 °C | 20.3 °C | 50.8 mm |
| July | 5.8 °C | 26.7 °C | 32.26 mm |
| August | 4.7 °C | 26.2 °C | 25.4 mm |
| September | 1.1 °C | 20.7 °C | 28.45 mm |
| October | -3.5 °C | 12.6 °C | 25.65 mm |
| November | -8.7 °C | 4.4 °C | 20.57 mm |
| December | -13.1 °C | -1.1 °C | 17.27 mm |
| Annual | -4 °C | 11.9 °C | 313.68 mm |
| Average First Frost Date | July 11 - July 20 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |