Slater, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.2 °F (low) to 61.5 °F (high). Annual precipitation averages 15.8 Inches. Slater 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.0 °F | 40.4 °F | 0.4 in. |
| February | 18.1 °F | 41.7 °F | 0.6 in. |
| March | 25.1 °F | 50.9 °F | 0.92 in. |
| April | 31.4 °F | 57.2 °F | 1.93 in. |
| May | 40.7 °F | 66.7 °F | 2.95 in. |
| June | 49.8 °F | 78.3 °F | 2.07 in. |
| July | 55.9 °F | 87.6 °F | 1.64 in. |
| August | 53.6 °F | 85.9 °F | 1.4 in. |
| September | 44.3 °F | 77.1 °F | 1.36 in. |
| October | 32.6 °F | 62.7 °F | 1.25 in. |
| November | 23.5 °F | 49.0 °F | 0.64 in. |
| December | 17.9 °F | 40.3 °F | 0.62 in. |
| Annual | 34.2 °F | 61.5 °F | 15.78 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |