Hulett, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.5 °F (low) to 58.5 °F (high). Annual precipitation averages 18.1 Inches. Hulett 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 | 10.1 °F | 34.2 °F | 0.61 in. |
| February | 12.8 °F | 37.1 °F | 0.69 in. |
| March | 21.6 °F | 47.1 °F | 1.14 in. |
| April | 29.4 °F | 55.8 °F | 1.83 in. |
| May | 39.5 °F | 65.2 °F | 2.87 in. |
| June | 49.0 °F | 76.6 °F | 3.16 in. |
| July | 55.1 °F | 85.5 °F | 2.06 in. |
| August | 53.0 °F | 85.0 °F | 1.35 in. |
| September | 43.0 °F | 74.8 °F | 1.2 in. |
| October | 31.5 °F | 59.5 °F | 1.77 in. |
| November | 20.5 °F | 45.5 °F | 0.84 in. |
| December | 12.2 °F | 35.5 °F | 0.6 in. |
| Annual | 31.5 °F | 58.5 °F | 18.12 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 4a : -30°F to -25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |