Lockwood, Montana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.2 °C (low) to 16.6 °C (high). Annual precipitation averages 373.1 Millimeters. Lockwood is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.9 °C | 3.1 °C | 11.94 mm |
| February | -8.4 °C | 5.2 °C | 12.7 mm |
| March | -4.2 °C | 11.1 °C | 21.34 mm |
| April | 0.6 °C | 15.6 °C | 48.01 mm |
| May | 5.7 °C | 20.7 °C | 58.67 mm |
| June | 10.3 °C | 26.2 °C | 60.71 mm |
| July | 13.6 °C | 31.6 °C | 30.99 mm |
| August | 12.3 °C | 30.9 °C | 25.91 mm |
| September | 7.2 °C | 25 °C | 37.59 mm |
| October | 0.9 °C | 16.8 °C | 38.61 mm |
| November | -4.7 °C | 9.2 °C | 12.95 mm |
| December | -9.2 °C | 3.6 °C | 13.72 mm |
| Annual | 1.2 °C | 16.6 °C | 373.14 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |