Alcova, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.8 °F (low) to 60.2 °F (high). Annual precipitation averages 11.6 Inches. Alcova is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.0 °F | 36.9 °F | 0.53 in. |
| February | 17.4 °F | 38.7 °F | 0.58 in. |
| March | 24.6 °F | 48.9 °F | 0.87 in. |
| April | 30.6 °F | 56.8 °F | 1.45 in. |
| May | 39.5 °F | 66.6 °F | 2.1 in. |
| June | 48.0 °F | 79.0 °F | 1.22 in. |
| July | 55.7 °F | 88.4 °F | 0.79 in. |
| August | 53.8 °F | 86.6 °F | 0.69 in. |
| September | 44.3 °F | 76.0 °F | 0.89 in. |
| October | 33.5 °F | 61.0 °F | 1.36 in. |
| November | 24.1 °F | 46.8 °F | 0.6 in. |
| December | 17.3 °F | 37.0 °F | 0.52 in. |
| Annual | 33.8 °F | 60.2 °F | 11.6 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |