Outlook, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -2.2 °C (low) to 11.2 °C (high). Annual precipitation averages 391.9 Millimeters. Outlook is located in USDA Plant Hardiness Zone 3b. 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 | -17.4 °C | -6.3 °C | 10.92 mm |
| February | -15.1 °C | -3.8 °C | 7.87 mm |
| March | -8.9 °C | 2.8 °C | 14.73 mm |
| April | -2.2 °C | 12.1 °C | 29.97 mm |
| May | 3.8 °C | 18.5 °C | 52.32 mm |
| June | 9.3 °C | 23.1 °C | 87.12 mm |
| July | 11.9 °C | 27.2 °C | 68.07 mm |
| August | 10.8 °C | 27.5 °C | 40.39 mm |
| September | 5.6 °C | 21.7 °C | 30.73 mm |
| October | -1.3 °C | 12.6 °C | 24.64 mm |
| November | -8.6 °C | 2.6 °C | 13.21 mm |
| December | -14.7 °C | -4.1 °C | 11.94 mm |
| Annual | -2.2 °C | 11.2 °C | 391.91 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |