Harrisville, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 4.6 °C (low) to 16.9 °C (high). Annual precipitation averages 473.2 Millimeters. 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 | -6.2 °C | 2.3 °C | 53.34 mm |
| February | -4.1 °C | 5.4 °C | 41.66 mm |
| March | 0.3 °C | 11.4 °C | 48.26 mm |
| April | 3.6 °C | 15.7 °C | 52.07 mm |
| May | 8.1 °C | 21.2 °C | 60.45 mm |
| June | 12.3 °C | 27.4 °C | 28.7 mm |
| July | 16.8 °C | 32.8 °C | 12.7 mm |
| August | 15.9 °C | 31.7 °C | 18.03 mm |
| September | 10.7 °C | 25.7 °C | 34.04 mm |
| October | 4.5 °C | 17.6 °C | 44.7 mm |
| November | -1.1 °C | 9.2 °C | 34.04 mm |
| December | -5.5 °C | 2.7 °C | 45.21 mm |
| Annual | 4.6 °C | 16.9 °C | 473.2 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |