Alcova, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1 °C (low) to 15.7 °C (high). Annual precipitation averages 294.7 Millimeters. 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 | -8.3 °C | 2.7 °C | 13.46 mm |
| February | -8.1 °C | 3.7 °C | 14.73 mm |
| March | -4.1 °C | 9.4 °C | 22.1 mm |
| April | -0.8 °C | 13.8 °C | 36.83 mm |
| May | 4.2 °C | 19.2 °C | 53.34 mm |
| June | 8.9 °C | 26.1 °C | 30.99 mm |
| July | 13.2 °C | 31.3 °C | 20.07 mm |
| August | 12.1 °C | 30.3 °C | 17.53 mm |
| September | 6.8 °C | 24.4 °C | 22.61 mm |
| October | 0.8 °C | 16.1 °C | 34.54 mm |
| November | -4.4 °C | 8.2 °C | 15.24 mm |
| December | -8.2 °C | 2.8 °C | 13.21 mm |
| Annual | 1 °C | 15.7 °C | 294.65 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |