Garland, Wyoming has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 0.1 °C (low) to 15.2 °C (high). Annual precipitation averages 175.5 Millimeters. Garland is located in USDA Plant Hardiness Zone 5a. 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 | -12.4 °C | 0.8 °C | 4.32 mm |
| February | -10.2 °C | 3.2 °C | 4.83 mm |
| March | -4.8 °C | 10 °C | 5.59 mm |
| April | -0.3 °C | 14.8 °C | 16.76 mm |
| May | 5.2 °C | 19.9 °C | 33.27 mm |
| June | 9.7 °C | 25.7 °C | 29.72 mm |
| July | 13.2 °C | 30.8 °C | 21.59 mm |
| August | 11.8 °C | 30 °C | 12.19 mm |
| September | 6.6 °C | 23.9 °C | 22.61 mm |
| October | 0.2 °C | 15.3 °C | 16.76 mm |
| November | -6.2 °C | 7.1 °C | 4.32 mm |
| December | -11.4 °C | 1.2 °C | 3.56 mm |
| Annual | 0.1 °C | 15.2 °C | 175.52 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 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 | BWk - Cold Desert Climate |