Nephi, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.7 °C (low) to 17.5 °C (high). Annual precipitation averages 359.2 Millimeters. Nephi is located in USDA Plant Hardiness Zone 6b. 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 | -8.8 °C | 3 °C | 35.31 mm |
| February | -6.4 °C | 6.1 °C | 32.77 mm |
| March | -2.5 °C | 12.1 °C | 35.31 mm |
| April | 0.2 °C | 16.1 °C | 42.67 mm |
| May | 4.4 °C | 21.3 °C | 40.89 mm |
| June | 9.4 °C | 28.1 °C | 19.81 mm |
| July | 14.2 °C | 32.6 °C | 13.46 mm |
| August | 13.5 °C | 31.7 °C | 18.8 mm |
| September | 7.7 °C | 26.4 °C | 24.64 mm |
| October | 1.4 °C | 18.6 °C | 34.8 mm |
| November | -4 °C | 10.6 °C | 28.45 mm |
| December | -8.6 °C | 3.3 °C | 32.26 mm |
| Annual | 1.7 °C | 17.5 °C | 359.17 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |