Carter, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 27.1 °F (low) to 56.6 °F (high). Annual precipitation averages 10.2 Inches. Carter is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.3 °F | 31.3 °F | 0.53 in. |
| February | 10.1 °F | 34.1 °F | 0.53 in. |
| March | 19.5 °F | 44.5 °F | 0.66 in. |
| April | 26.2 °F | 53.9 °F | 1.0 in. |
| May | 34.3 °F | 63.9 °F | 1.67 in. |
| June | 41.2 °F | 75.9 °F | 1.0 in. |
| July | 48.0 °F | 84.9 °F | 0.75 in. |
| August | 46.0 °F | 83.3 °F | 0.83 in. |
| September | 37.4 °F | 73.3 °F | 1.02 in. |
| October | 27.5 °F | 58.7 °F | 0.97 in. |
| November | 17.5 °F | 43.0 °F | 0.69 in. |
| December | 8.6 °F | 31.8 °F | 0.56 in. |
| Annual | 27.1 °F | 56.6 °F | 10.21 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |