Harrisville, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 40.3 °F (low) to 62.5 °F (high). Annual precipitation averages 18.6 Inches. Harrisville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.8 °F | 36.1 °F | 2.1 in. |
| February | 24.6 °F | 41.7 °F | 1.64 in. |
| March | 32.6 °F | 52.6 °F | 1.9 in. |
| April | 38.5 °F | 60.2 °F | 2.05 in. |
| May | 46.6 °F | 70.2 °F | 2.38 in. |
| June | 54.1 °F | 81.3 °F | 1.13 in. |
| July | 62.3 °F | 91.0 °F | 0.5 in. |
| August | 60.7 °F | 89.1 °F | 0.71 in. |
| September | 51.3 °F | 78.3 °F | 1.34 in. |
| October | 40.1 °F | 63.7 °F | 1.76 in. |
| November | 30.0 °F | 48.6 °F | 1.34 in. |
| December | 22.1 °F | 36.9 °F | 1.78 in. |
| Annual | 40.3 °F | 62.5 °F | 18.63 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |