Ten Sleep, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.5 °C (low) to 16.3 °C (high). Annual precipitation averages 315.5 Millimeters. Ten Sleep 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.6 °C | 1.8 °C | 16.26 mm |
| February | -11.3 °C | 3.9 °C | 20.57 mm |
| March | -5.2 °C | 10.5 °C | 19.3 mm |
| April | -0.6 °C | 15.6 °C | 37.85 mm |
| May | 4.9 °C | 20.9 °C | 52.07 mm |
| June | 9.5 °C | 27 °C | 33.27 mm |
| July | 13.1 °C | 32.1 °C | 23.62 mm |
| August | 11.1 °C | 31.1 °C | 17.53 mm |
| September | 5.9 °C | 25.4 °C | 35.31 mm |
| October | -0.4 °C | 16.4 °C | 33.27 mm |
| November | -6.8 °C | 8.3 °C | 17.27 mm |
| December | -12.1 °C | 2.4 °C | 9.14 mm |
| Annual | -0.5 °C | 16.3 °C | 315.46 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |