Lost Springs, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Annual precipitation averages 378 Millimeters. Lost Springs is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.5 °C | 2.9 °C | 12.45 mm |
| February | -9.7 °C | 3.9 °C | 16.76 mm |
| March | -5.1 °C | 9.6 °C | 25.4 mm |
| April | -1.3 °C | 13.6 °C | 48.51 mm |
| May | 4 °C | 19.1 °C | 68.07 mm |
| June | 8.9 °C | 25.5 °C | 51.82 mm |
| July | 13.1 °C | 30.4 °C | 37.59 mm |
| August | 11.7 °C | 29.8 °C | 30.99 mm |
| September | 6.3 °C | 24.8 °C | 27.94 mm |
| October | -0.4 °C | 16.3 °C | 32.26 mm |
| November | -6.2 °C | 8.6 °C | 14.22 mm |
| December | -10.4 °C | 3 °C | 11.94 mm |
| Annual | 0 °C | 15.6 °C | 377.95 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |