Farmington, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 5 °C (low) to 17.7 °C (high). Annual precipitation averages 629.4 Millimeters. Farmington 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 3.5 °C | 67.56 mm |
| February | -3.4 °C | 6.4 °C | 56.64 mm |
| March | 0.7 °C | 12.2 °C | 68.33 mm |
| April | 3.7 °C | 16.1 °C | 78.74 mm |
| May | 8.2 °C | 21.7 °C | 81.28 mm |
| June | 12.6 °C | 28.1 °C | 35.05 mm |
| July | 17.6 °C | 33.4 °C | 14.73 mm |
| August | 16.6 °C | 32.4 °C | 22.61 mm |
| September | 11.3 °C | 26.7 °C | 38.35 mm |
| October | 4.7 °C | 18.6 °C | 52.32 mm |
| November | -1 °C | 10.1 °C | 53.09 mm |
| December | -5.2 °C | 3.7 °C | 60.71 mm |
| Annual | 5 °C | 17.7 °C | 629.41 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |