Lost Springs, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.1 °F (low) to 60.1 °F (high). Annual precipitation averages 14.9 Inches. 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 | 13.1 °F | 37.3 °F | 0.49 in. |
| February | 14.6 °F | 39.1 °F | 0.66 in. |
| March | 22.9 °F | 49.2 °F | 1.0 in. |
| April | 29.6 °F | 56.4 °F | 1.91 in. |
| May | 39.2 °F | 66.3 °F | 2.68 in. |
| June | 48.0 °F | 77.9 °F | 2.04 in. |
| July | 55.5 °F | 86.8 °F | 1.48 in. |
| August | 53.0 °F | 85.7 °F | 1.22 in. |
| September | 43.4 °F | 76.6 °F | 1.1 in. |
| October | 31.3 °F | 61.3 °F | 1.27 in. |
| November | 20.8 °F | 47.5 °F | 0.56 in. |
| December | 13.2 °F | 37.4 °F | 0.47 in. |
| Annual | 32.1 °F | 60.1 °F | 14.88 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |