Y-O Ranch, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.7 °F (low) to 62.1 °F (high). Annual precipitation averages 14.4 Inches. Y-O Ranch 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. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.7 °F | 40.4 °F | 0.3 in. |
| February | 18.6 °F | 42.0 °F | 0.5 in. |
| March | 25.7 °F | 51.4 °F | 0.79 in. |
| April | 32.1 °F | 58.3 °F | 1.64 in. |
| May | 41.3 °F | 67.7 °F | 2.78 in. |
| June | 50.5 °F | 79.1 °F | 2.12 in. |
| July | 56.4 °F | 87.9 °F | 1.62 in. |
| August | 54.3 °F | 86.8 °F | 1.2 in. |
| September | 44.8 °F | 78.0 °F | 1.21 in. |
| October | 33.3 °F | 63.5 °F | 1.31 in. |
| November | 24.2 °F | 49.2 °F | 0.51 in. |
| December | 18.2 °F | 40.3 °F | 0.44 in. |
| Annual | 34.7 °F | 62.1 °F | 14.42 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |