Y-O Ranch, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.5 °C (low) to 16.7 °C (high). Annual precipitation averages 366.3 Millimeters. 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 | -8.5 °C | 4.7 °C | 7.62 mm |
| February | -7.4 °C | 5.6 °C | 12.7 mm |
| March | -3.5 °C | 10.8 °C | 20.07 mm |
| April | 0.1 °C | 14.6 °C | 41.66 mm |
| May | 5.2 °C | 19.8 °C | 70.61 mm |
| June | 10.3 °C | 26.2 °C | 53.85 mm |
| July | 13.6 °C | 31.1 °C | 41.15 mm |
| August | 12.4 °C | 30.4 °C | 30.48 mm |
| September | 7.1 °C | 25.6 °C | 30.73 mm |
| October | 0.7 °C | 17.5 °C | 33.27 mm |
| November | -4.3 °C | 9.6 °C | 12.95 mm |
| December | -7.7 °C | 4.6 °C | 11.18 mm |
| Annual | 1.5 °C | 16.7 °C | 366.27 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |