Hyattville, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.8 °F (low) to 60.3 °F (high). Annual precipitation averages 11.5 Inches. Hyattville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.1 °F | 34.6 °F | 0.5 in. |
| February | 12.6 °F | 38.0 °F | 0.6 in. |
| March | 22.8 °F | 49.9 °F | 0.75 in. |
| April | 31.2 °F | 58.3 °F | 1.29 in. |
| May | 40.9 °F | 68.2 °F | 2.04 in. |
| June | 49.4 °F | 79.6 °F | 1.4 in. |
| July | 55.9 °F | 89.5 °F | 0.88 in. |
| August | 52.7 °F | 87.4 °F | 0.59 in. |
| September | 43.4 °F | 76.2 °F | 1.21 in. |
| October | 31.9 °F | 60.4 °F | 1.15 in. |
| November | 20.4 °F | 46.2 °F | 0.66 in. |
| December | 11.0 °F | 35.7 °F | 0.47 in. |
| Annual | 31.8 °F | 60.3 °F | 11.54 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |