Dubois, Wyoming has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 26.9 °F (low) to 53.5 °F (high). Annual precipitation averages 11.2 Inches. Dubois is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.9 °F | 33.3 °F | 0.28 in. |
| February | 11.2 °F | 35.0 °F | 0.48 in. |
| March | 18.7 °F | 42.7 °F | 0.55 in. |
| April | 25.1 °F | 49.7 °F | 1.35 in. |
| May | 32.7 °F | 58.9 °F | 1.96 in. |
| June | 39.5 °F | 69.5 °F | 1.57 in. |
| July | 44.9 °F | 79.1 °F | 1.01 in. |
| August | 43.3 °F | 77.8 °F | 0.85 in. |
| September | 36.4 °F | 67.7 °F | 1.38 in. |
| October | 28.2 °F | 54.5 °F | 0.87 in. |
| November | 18.9 °F | 40.9 °F | 0.57 in. |
| December | 12.1 °F | 32.7 °F | 0.37 in. |
| Annual | 26.9 °F | 53.5 °F | 11.24 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |