Manti, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 16.9 °C (high). Annual precipitation averages 314 Millimeters. Manti is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.9 °C | 2.8 °C | 24.13 mm |
| February | -6.9 °C | 5.8 °C | 23.11 mm |
| March | -3.2 °C | 11.6 °C | 30.23 mm |
| April | -0.4 °C | 15.4 °C | 32.77 mm |
| May | 3.7 °C | 20.7 °C | 35.31 mm |
| June | 8.1 °C | 27.4 °C | 20.57 mm |
| July | 11.9 °C | 31.5 °C | 16.26 mm |
| August | 11.1 °C | 30.4 °C | 21.08 mm |
| September | 6.2 °C | 25.7 °C | 27.18 mm |
| October | 0.2 °C | 18.3 °C | 30.73 mm |
| November | -5.2 °C | 10.2 °C | 24.13 mm |
| December | -9.8 °C | 2.8 °C | 28.45 mm |
| Annual | 0.5 °C | 16.9 °C | 313.95 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |