Helper, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.1 °F (low) to 62.1 °F (high). Annual precipitation averages 10.9 Inches. Helper is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.2 °F | 36.2 °F | 0.94 in. |
| February | 18.3 °F | 41.7 °F | 0.96 in. |
| March | 26.2 °F | 52.2 °F | 0.87 in. |
| April | 32.1 °F | 60.8 °F | 0.77 in. |
| May | 40.6 °F | 70.5 °F | 0.87 in. |
| June | 49.1 °F | 82.1 °F | 0.64 in. |
| July | 56.2 °F | 89.0 °F | 0.77 in. |
| August | 54.6 °F | 86.5 °F | 1.06 in. |
| September | 46.2 °F | 77.5 °F | 1.33 in. |
| October | 34.7 °F | 63.8 °F | 1.31 in. |
| November | 23.4 °F | 48.6 °F | 0.6 in. |
| December | 14.1 °F | 36.4 °F | 0.75 in. |
| Annual | 34.1 °F | 62.1 °F | 10.87 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |