Hulett, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.3 °C (low) to 14.7 °C (high). Annual precipitation averages 460.3 Millimeters. 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 | -12.2 °C | 1.2 °C | 15.49 mm |
| February | -10.7 °C | 2.8 °C | 17.53 mm |
| March | -5.8 °C | 8.4 °C | 28.96 mm |
| April | -1.4 °C | 13.2 °C | 46.48 mm |
| May | 4.2 °C | 18.4 °C | 72.9 mm |
| June | 9.4 °C | 24.8 °C | 80.26 mm |
| July | 12.8 °C | 29.7 °C | 52.32 mm |
| August | 11.7 °C | 29.4 °C | 34.29 mm |
| September | 6.1 °C | 23.8 °C | 30.48 mm |
| October | -0.3 °C | 15.3 °C | 44.96 mm |
| November | -6.4 °C | 7.5 °C | 21.34 mm |
| December | -11 °C | 1.9 °C | 15.24 mm |
| Annual | -0.3 °C | 14.7 °C | 460.25 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |