Big Piney, Wyoming has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 20.7 °F (low) to 53 °F (high). Annual precipitation averages 8.7 Inches. Big Piney is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around July 21 - July 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °F | 26.3 °F | 0.73 in. |
| February | 0.6 °F | 29.4 °F | 0.64 in. |
| March | 13.3 °F | 40.5 °F | 0.68 in. |
| April | 21.6 °F | 51.2 °F | 0.92 in. |
| May | 30.2 °F | 61.0 °F | 1.06 in. |
| June | 37.3 °F | 71.9 °F | 0.73 in. |
| July | 42.6 °F | 80.5 °F | 0.58 in. |
| August | 40.7 °F | 79.9 °F | 0.53 in. |
| September | 32.4 °F | 70.3 °F | 0.64 in. |
| October | 22.5 °F | 56.8 °F | 0.87 in. |
| November | 10.3 °F | 40.2 °F | 0.56 in. |
| December | -0.4 °F | 27.7 °F | 0.74 in. |
| Annual | 20.7 °F | 53 °F | 8.68 in. |
| Average First Frost Date | July 21 - July 31 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |