Lynndyl, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.9 °C (low) to 18.7 °C (high). Annual precipitation averages 255.3 Millimeters. Lynndyl 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 | -8.8 °C | 3.7 °C | 22.61 mm |
| February | -6.1 °C | 7.2 °C | 22.35 mm |
| March | -2.4 °C | 13.3 °C | 26.67 mm |
| April | 0.3 °C | 17.3 °C | 31.5 mm |
| May | 5.1 °C | 23.1 °C | 27.43 mm |
| June | 9.7 °C | 29.7 °C | 14.22 mm |
| July | 14.8 °C | 34.4 °C | 10.41 mm |
| August | 14 °C | 33.2 °C | 14.99 mm |
| September | 8.1 °C | 27.6 °C | 19.81 mm |
| October | 1.3 °C | 19.6 °C | 25.91 mm |
| November | -4.3 °C | 11.1 °C | 19.3 mm |
| December | -8.9 °C | 4 °C | 20.07 mm |
| Annual | 1.9 °C | 18.7 °C | 255.27 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |