Cowley, Wyoming has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 31.7 °F (low) to 59.4 °F (high). Annual precipitation averages 7 Inches. Cowley is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.4 °F | 32.1 °F | 0.23 in. |
| February | 12.9 °F | 37.4 °F | 0.27 in. |
| March | 22.8 °F | 50.0 °F | 0.28 in. |
| April | 31.3 °F | 58.4 °F | 0.73 in. |
| May | 41.1 °F | 67.9 °F | 1.19 in. |
| June | 49.5 °F | 78.8 °F | 1.2 in. |
| July | 55.6 °F | 88.5 °F | 0.72 in. |
| August | 52.9 °F | 86.7 °F | 0.35 in. |
| September | 43.2 °F | 75.1 °F | 0.81 in. |
| October | 31.9 °F | 59.4 °F | 0.72 in. |
| November | 20.5 °F | 44.6 °F | 0.25 in. |
| December | 10.6 °F | 33.6 °F | 0.2 in. |
| Annual | 31.7 °F | 59.4 °F | 6.95 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |