Purple Sage, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1 °C (low) to 14.7 °C (high). Annual precipitation averages 247.1 Millimeters. Purple Sage 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. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.8 °C | 0.8 °C | 13.46 mm |
| February | -10.6 °C | 2.7 °C | 12.45 mm |
| March | -5.4 °C | 8.3 °C | 18.03 mm |
| April | -1.7 °C | 13.5 °C | 29.21 mm |
| May | 2.8 °C | 18.9 °C | 43.43 mm |
| June | 7.1 °C | 25.3 °C | 23.37 mm |
| July | 10.8 °C | 30.2 °C | 14.48 mm |
| August | 9.9 °C | 29.1 °C | 15.24 mm |
| September | 4.9 °C | 23.8 °C | 25.4 mm |
| October | -0.7 °C | 15.7 °C | 24.13 mm |
| November | -6.4 °C | 7.1 °C | 15.75 mm |
| December | -11.4 °C | 0.9 °C | 12.19 mm |
| Annual | -1 °C | 14.7 °C | 247.14 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |